Well: Ask Well: Squats for Aging Knees

You are already doing many things right, in terms of taking care of your aging knees. In particular, it sounds as if you are keeping your weight under control. Carrying extra pounds undoubtedly strains knees and contributes to pain and eventually arthritis.

You mention weight training, too, which is also valuable. Sturdy leg muscles, particularly those at the front and back of the thighs, stabilize the knee, says Joseph Hart, an assistant professor of kinesiology and certified athletic trainer at the University of Virginia, who often works with patients with knee pain.

An easy exercise to target those muscles is the squat. Although many of us have heard that squats harm knees, the exercise is actually “quite good for the knees, if you do the squats correctly,” Dr. Hart says. Simply stand with your legs shoulder-width apart and bend your legs until your thighs are almost, but not completely, parallel to the ground. Keep your upper body straight. Don’t bend forward, he says, since that movement can strain the knees. Try to complete 20 squats, using no weight at first. When that becomes easy, Dr. Hart suggests, hold a barbell with weights attached. Or simply clutch a full milk carton, which is my cheapskate’s squats routine.

Straight leg lifts are also useful for knee health. Sit on the floor with your back straight and one leg extended and the other bent toward your chest. In this position, lift the straight leg slightly off the ground and hold for 10 seconds. Repeat 10 to 20 times and then switch legs.

You can also find other exercises that target the knees in this video, “Increasing Knee Stability.”

Of course, before starting any exercise program, consult a physician, especially, Dr. Hart says, if your knees often ache, feel stiff or emit a strange, clicking noise, which could be symptoms of arthritis.

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U.S. Durable Goods Orders Exceed Estimates

WASHINGTON — Orders for durable goods jumped 4.6 percent in December, while a gauge of future business spending also rose, a sign that corporate worries over tighter fiscal policy at the end of 2012 may not have held back investment plans as much as feared.

The Commerce Department said on Monday that overall durable goods orders jumped 4.6 percent, more than expected.

In addition, nondefense capital goods orders excluding aircraft, a closely watched proxy for investment plans, edged higher 0.2 percent. The government also revised higher its estimate for November.

Analyst estimates for goods orders averaged around 2 percent.

Separately, the National Association of Realtors said contracts to buy previously owned homes in the United States unexpectedly fell in December after three months of gains.

The trade group said its Pending Home Sales Index, based on contracts signed last month, dropped 4.3 percent to 101.7.

The drop in contracts, which the Realtors group blamed on the tightening stock of homes, suggested resales could fall again in January after slipping in December.

“The supply limitation appears to be the main factor holding back contract signings in the past month,” said Lawrence Yun, the group’s chief exonomist. “Supplies of homes costing less than $100,000 are tight in much of the country, so first-time buyers have fewer options.”

The NAR expects sales of previously owned homes to increase 9 percent this year after a similar gain in 2012.

Home resale contracts were down in three of the country’s four regions last month. They increased in the Midwest.

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North Korean Leader Vows ‘High-Profile’ Retaliation

SEOUL, South Korea — Kim Jong-un, the North Korean leader, has ordered his top military and party officials to take “substantial and high-profile important state measures” to retaliate against American-led United Nations sanctions on the country, the North’s official media reported Sunday.

North Korea did not clarify what those measures might be, but it referred to a series of earlier statements in which Mr. Kim’s government has threatened to launch more long-range rockets and conduct a third nuclear test to build an ability to “target” the United States.

Mr. Kim threw his weight behind his government’s escalating standoff with Washington when he called a meeting of top security and foreign affairs officials and gave an instruction in his name. He inherited the posts of supreme party and military leaders from his father, Kim Jong-il, who died in December 2011.

By calling such a meeting and having it reported in state news media, Mr. Kim appeared to be asserting his leadership in what his country called an “all-out action” against the United States, unlike his father, who tended to remain reclusive during similar confrontations.

“At the consultative meeting, Kim Jong-un expressed the firm resolution to take substantial and high-profile important state measures in view of the prevailing situation,” said the North’s Korean Central News Agency, or K.C.N.A. “He advanced specific tasks to the officials concerned.”

The K.C.N.A. dispatch, which was distributed on Sunday, was dated Saturday, indicating that the meeting in Pyongyang, the capital, took place then. That was the same day on which the North’s main party newspaper, Rodong Sinmun, said that the United Nations Security Council’s resolution last Tuesday calling for tightening sanctions against the North left it with “no other option” but a nuclear test.

“A nuclear test is what the people demand,” it said in a commentary.

The resolution was adopted unanimously — with the support of the North’s traditional protector, China — as punishment for its Dec. 12 rocket launching. The Security Council determined that the launching was a cover for testing intercontinental ballistic missile technology and a violation of its earlier resolutions banning North Korea from conducting such tests.

The North rejected the old resolutions, as well as the latest one, insisting that launching rockets to put satellites into orbit was its sovereign right. Its successful rocket launching in December, coming after a failure last April, was the most visible achievement Mr. Kim’s government could present to its people, who have suffered decades of poverty and isolation. In North Korean propaganda, defending the rocket program is likened to protecting national pride and independence — even if the country has to pay a high economic price.

Last Thursday, North Korea said that its drive to rebuild its moribund economy and its rocket program, until now billed as a peaceful space project, would be adjusted and redirected toward efforts to foil hostilities by the United States. On Sunday, it said the Security Council’s action “has thrown a grave obstacle” in the way of its efforts to focus on “economic construction so that the people may not tighten their belts any longer.”

Still, it said it had to “defend its sovereignty by itself” because “different countries concerned” failed to “fairly solve the problem.” In the past few days, North Korea, without citing China by name, expressed bitterness and defiance against its longtime Communist ally for endorsing the American-led Security Council resolution. On Saturday, the Rodong Sinmun reaffirmed its dislike of “sadae,” or toadying big countries, including China.

China provides all of North Korea’s fuel and remains its biggest trading partner, but analysts believe that its influence is limited on the recalcitrant government in Pyongyang. Beijing has been thus far reluctant to use its economic leverage, fearing that it would only drive its neighbor into more provocations, which would be a blow to China’s interest in maintaining stability in the region.

International attention has focused on the Punggye nuclear test site in northeastern North Korea, where the country conducted its two previous underground nuclear tests, in 2006 and 2009. Enough preparations have been made there recently that a third test could happen on short notice from the North Korean leadership, South Korean officials said.

In a report issued Sunday, the Institute for National Security Strategy, a research organization affiliated with South Korea’s main intelligence service, said that North Korea might use provocations this year to tame the incoming government of President-elect Park Geun-hye, who will be sworn in next month.

“It will wait and see until the new government’s North Korea policy shapes up,” it said. “If the policy is not favorable, the North may lash out with provocations.”

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Djokovic beats Murray for 3rd straight Aust. title

MELBOURNE, Australia (AP) — Novak Djokovic became the first man in the Open era to win three consecutive Australian titles when he beat Andy Murray 6-7 (2), 7-6 (3), 6-3, 6-2 in Sunday's final.

Little wonder he loves Rod Laver Arena.

"It's definitely my favorite Grand Slam," he said. "It's an incredible feeling winning this trophy once more. I love this court."

Djokovic has won four of his six major titles at Melbourne Park, where he is now unbeaten in 21 matches.

Nine other men had won back-to-back titles in Australia over 45 years, but none were able to claim three in a row.

Only two other men, American Jack Crawford (1931-33) and Australian Roy Emerson (1963-67), have won three or more consecutive Australian championships.

Born a week apart in May 1987 and friends since their junior playing days, Djokovic and Murray played like they knew each other's game very well in a rematch of last year's U.S. Open final. There were no service breaks until the eighth game of the third set, when Djokovic finally broke through and then held at love to lead by two sets to one.

Djokovic earned two more service breaks in the fourth set, including one to take a 4-1 lead when U.S. Open champion Murray double-faulted on break point.

"It's been an incredible match as we could have expected," Djokovic said. "When we play each other, it's always, we push each other to the limit and I think those two sets went over two hours, 15 minutes, physically I was just trying to hang in there. Play my game and focus on every point."

The 25-year-old Serb didn't rip his shirt off this time, as he did to celebrate his epic 5-hour, 53-minute win over Rafael Nadal in last year's final. He just did a little dance, looked up to the sky and then applauded the crowd after the 3-hour, 40-minute match.

Murray's win over Djokovic in the U.S. Open final last year ended a 76-year drought for British men at the majors, but he still is yet to make a breakthrough in Australia after losing a third final here in the last four years.

Djokovic's win went against the odds of recent finals at Melbourne Park. In four of the past five years, the player who won the second of the semifinals has finished on top in the championship match. But this year, Djokovic played his semifinal on Thursday — an easy 89-minute minute win over No. 4-seeded David Ferrer. Murray needed five energy sapping sets to beat 17-time major winner Roger Federer on Friday night.

"You don't wake up the next day and feel perfect, obviously," Murray said of the Federer match. "It's the longest match I played in six months probably. It obviously wasn't an issue today. I started the match well. I thought I moved pretty good throughout."

The win consolidated Djokovic's position as the No. 1-ranked player in the world, while Federer and Murray will be second and third when the ATP rankings are released Monday.

Their last two matches in Grand Slams — Murray's five-set win at last year's U.S. Open and Djokovic's victory here last year in five in the semifinals — had a total of 35 service breaks.

It was a vastly different, more tactical battle on Sunday, with the first two tight sets decided in tiebreakers.

"All our matches in last three years have been decided in a very few points, so it's really hard to say if I've done anything different," Djokovic said. "I tried to be more aggressive. So I went for my shots, especially in the third and fourth; came to the net quite often. I was quite successful in that percentage, so it worked well for me."

Murray, who called for a trainer to retape blisters on his right foot at the end of the second set, was visibly annoyed by noise from the crowd during his service games in the third set, stopping his service motion twice until the crowd quieted down. After dropping the third set, he complained about the noise to chair umpire John Blom.

"It's just a bit sore when you're running around," Murray said. "It's not like pulling a calf muscle or something. It just hurts when you run."

Djokovic came from 0-40 down in the second game of the second set to hold his serve, something he called "definitely one of the turning points."

"He missed an easy backhand and I think mentally I just relaxed after that," Djokovic said. "I just felt I'm starting to get into the rhythm that I wanted to. I was little more aggressive and started to dictate the play."

Although Djokovic went into the match with a 10-7 lead in head-to-heads, Murray had beaten Djokovic five out of eight times in tiebreakers, and that improved to six of nine after four unforced errors by Djokovic to end the first set.

Djokovic pegged back that edge in the second set, when Murray also didn't help his cause by double-faulting to give Djokovic a 3-2 lead, and the Serbian player didn't trail again in the tiebreaker.

On the double-fault, Murray had to stop as he was about to serve to pick up a feather that had fallen on the court.

"I could have served, it just caught my eye before I served ... I thought it was a good idea to move it," he said.

"Maybe it wasn't because I obviously double faulted. At this level it can come down to just a few points here or there. My probably biggest chance was at the beginning of the second set; (I) didn't quite get it. When Novak had his chance at the end of the third, he got his."

Djokovic will have little time to savor the win — he's playing Davis Cup for Serbia next weekend against Belgium.

"It's going to be a lot of fun ... to see how I can adjust to clay court in indoor conditions, playing away Davis Cup, which is always tricky," he said.

Andre Agassi was among those in the capacity crowd — the four-time Australian champion's first trip Down Under in nearly 10 years — and he later presented the trophy to Djokovic.

Victoria Azarenka, who won Saturday's women's singles final over Li Na, was also there with her boyfriend rapper Redfoo. Actor Kevin Spacey met in the dressing room with both players ahead of the match and later tweeted a photo of himself with them.

In the earlier mixed doubles final Sunday, wild-card entrants Jarmila Gajdosova and Matthew Ebden of Australia beat the Czech pair of Lucie Hradecka and Frantisek Cermak 6-3, 7-5.

Read More..

Well: Ask Well: Squats for Aging Knees

You are already doing many things right, in terms of taking care of your aging knees. In particular, it sounds as if you are keeping your weight under control. Carrying extra pounds undoubtedly strains knees and contributes to pain and eventually arthritis.

You mention weight training, too, which is also valuable. Sturdy leg muscles, particularly those at the front and back of the thighs, stabilize the knee, says Joseph Hart, an assistant professor of kinesiology and certified athletic trainer at the University of Virginia, who often works with patients with knee pain.

An easy exercise to target those muscles is the squat. Although many of us have heard that squats harm knees, the exercise is actually “quite good for the knees, if you do the squats correctly,” Dr. Hart says. Simply stand with your legs shoulder-width apart and bend your legs until your thighs are almost, but not completely, parallel to the ground. Keep your upper body straight. Don’t bend forward, he says, since that movement can strain the knees. Try to complete 20 squats, using no weight at first. When that becomes easy, Dr. Hart suggests, hold a barbell with weights attached. Or simply clutch a full milk carton, which is my cheapskate’s squats routine.

Straight leg lifts are also useful for knee health. Sit on the floor with your back straight and one leg extended and the other bent toward your chest. In this position, lift the straight leg slightly off the ground and hold for 10 seconds. Repeat 10 to 20 times and then switch legs.

You can also find other exercises that target the knees in this video, “Increasing Knee Stability.”

Of course, before starting any exercise program, consult a physician, especially, Dr. Hart says, if your knees often ache, feel stiff or emit a strange, clicking noise, which could be symptoms of arthritis.

Read More..

J. Richard Hackman, an Expert in Team Dynamics, Dies at 72

J. Richard Hackman, a Harvard psychology professor whose fieldwork sometimes took him to the cockpit of an airliner to observe the crew in a nearly five-decade quest to determine the dynamics of teamwork and effective leadership, died on Jan. 8 in Boston. He was 72.

The cause was lung cancer, his wife, Judith Dozier Hackman, said.

Dr. Hackman, the author or co-author of 10 books on group dynamics, was the Edgar Pierce professor of social and organizational psychology at Harvard.

In one of his best-known books, “Leading Teams: Setting the Stage for Great Performances” (2002), he replaced the popular image of the powerful “I can do it all” team leader with that of someone who, as he wrote, had the subtle skills “to get a team established on a good trajectory, and then to make small adjustments along the way to help members succeed.”

The conditions for a successful team effort — among them “a compelling direction, an enabling team structure, a supportive organizational context and expert team coaching” — “are easy to remember,” Dr. Hackman wrote.

“The challenge,” he continued, “comes in developing an understanding of those conditions that is deep and nuanced enough to be useful in guiding action, and in devising strategies for creating them even in demanding or team-unfriendly organizational circumstances.”

Besides tracking the interplay of pilots, co-pilots and navigators aboard civilian and military planes, Dr. Hackman observed corporate boards, sports teams, orchestra players, telephone-line repair crews, hospital workers and restaurant kitchen staff members.

And in recent years, for his 2011 book, “Collaborative Intelligence,” he was allowed to observe interactions within the American intelligence, defense, law-enforcement and crisis-management communities.

“Although my main aspiration has been to provide guidance that will be useful to team leaders and members,” he wrote, “there are no ‘one-minute’ prescriptions here — creating, leading and serving on teams is not that simple.”

Anita Woolley, a professor of organizational behavior and theory at the Tepper School of Business at Carnegie Mellon University in Pittsburgh, said, “The key thing about Dr. Hackman’s work is that it stands in contrast to some of the more popular models of leadership that focused very much on style or how leaders behave, versus what they do.”

Rather than viewing pay as a prime motivator for good performance, she continued, “he focused on features of people’s jobs that made them more intrinsically satisfied: the freedom to determine how they conduct their work, having a variety of tasks, having knowledge of the ultimate outcomes of their work, knowing how their work affects or is received by other people.”

He also liked to overturn some of the received wisdom about teamwork. In a 2011 article for The Harvard Business Review, Dr. Hackman listed “Six Common Misperceptions About Teamwork.” Among them was this:

“Misperception No. 2: It’s good to mix it up. New members bring energy and fresh ideas to a team. Without them, members risk becoming complacent, inattentive to changes in the environment, and too forgiving of fellow members’ misbehavior.

“Actually: The longer members stay together as an intact group, the better they do. As unreasonable as this may seem, the research evidence is unambiguous. Whether it is a basketball team or a string quartet, teams that stay together longer play together better.”

John Richard Hackman was born in Joliet, Ill., on June 14, 1940, the only child of J. Edward and Helen Hackman. His father was an oil pipeline engineer, his mother a schoolteacher.

Dr. Hackman received a bachelor’s degree in mathematics from MacMurray College in Jacksonville, Ill., in 1962, and a doctorate in psychology from the University of Illinois in 1966. He soon joined the psychology and administrative sciences department faculties at Yale, where he taught until 1986, when he moved to the psychology and business departments at Harvard.

Besides his wife, who is an associate dean at Yale, he is survived by two daughters, Julia Beth Proffitt and Laura Dianne Codeanne, and four grandchildren.

After Dr. Hackman died, The Harvard Crimson wrote that for years he had “devoted countless hours to improving one team in particular — the Harvard women’s basketball squad, for which he volunteered as an honorary coach.”

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The Lede Blog: A 'Black Bloc' Emerges in Egypt

Last Updated, Saturday, 10:17 a.m. While using Twitter to narrate events in Tahrir Square on Friday, people in Egypt described tires burning in the street, protesters blocking traffic and hurling rocks, and police officers launching tear gas in an effort to break up crowds that had gathered to protest against the Muslim Brotherhood and the country’s new Islamist president.

Many of the actions described on Friday appeared to hew to a script that has become familiar over the past two years, but some in the crowds of protesters appeared to be using new tactics, dressing from head to toe in black, covering their faces with bandannas or kerchiefs and brandishing black flags as they skirmished with security forces.

Egypt’s newly formed Black Bloc anarchist group had members act as Tahrir security, even imitating new CSF uniforms: http://t.co/czWd5Je8

— Ghazala Irshad (@ghazalairshad) 25 Jan 13

“Asked one of them who they are they said we don’t talk to media but we are black bloc,” wrote ‏the British-Egyptian journalist Sarah Carr, adding that a member of the group had “mentioned anarchism.”

Shubra march is full of young men wearing wrestling masks.

— أبو كار (@Sarahcarr) 25 Jan 13

Saw a winning ski mask and spectacles combination. We’re banned from photographing them.

— أبو كار (@Sarahcarr) 25 Jan 13

Asked one of them who they are they said we dont talk to media but we are black bloc. Mentioned anarchism.

— أبو كار (@Sarahcarr) 25 Jan 13

An article filed on Thursday by The Associated Press reported the presence of a “previously unknown group calling itself the black block.” The article continued, “Wearing black masks and waving black banners, it warned the Muslim Brotherhood of using its ‘military wing’ to put down protests.”

Although largely new in Cairo, the term “black bloc” has been used for years in the United States and Europe to describe a tactic commonly used by anarchists and anticapitalists during large-scale political demonstrations that occasionally devolve into street fights with the authorities.

Participants in the bloc typically dress in black to foster a sense of unity and to make it difficult for witnesses to differentiate between individuals. Members of the bloc often blend in with larger groups of protesters, then break away, linking arms as they rush down streets.

In the United States, at least, black bloc members usually eschew violence against people but have few compunctions about damaging property.

The tactic received attention during the 1999 protests in Seattle against the World Trade Organization, when youths dressed in black broke windows and spray-painted graffiti on buildings.

In St. Paul, during the 2008 Republican National Convention, black bloc members roamed through the city smashing bank windows and using hammers to batter a police car.

It is unclear whether there are any connections between American and Egyptian black bloc participants, but the site anarchistnews.org posted a message about occurrences in Cairo, quoting the blog Even If Your Voice Shakes.

Last night, anarchism left the graffitied walls, small conversations, and online forums of Egypt, and came to life in Cairo, declaring itself a new force in the ongoing social revolution sparked two years ago with multiple firebombings against Muslim Brotherhood offices. Later, the government shutdown the “Black Blocairo” and “Egyptian Black Bloc” Facebook pages, but they were soon re-launched.

The site went on to say that Egyptian anarchists had firebombed the Shura Council.

As my colleague Robert Mackey reports, an Egyptian journalist, Sarah El Sirgany, wrote on Twitter, “Vendors tell me it was the Black Block group that attempted to storm the Ikhwan Online building sparking the fight.”

Later, she added, “Now those who had continued the fight are heading to Tahrir, flag of Black Block flying high.”

This week, a video was uploaded to an Egyptian YouTube channel titled “Black Bloc Egypt.” Accompanied by driving music the video shows masked people marching while holding aloft black banners, a black flag with an anarchy symbol and an Egyptian flag.

Egyptian journalists and bloggers wondered what to make of the black bloc in Egypt. In a place where sexual assaults and gropings remain common, one journalist, Ghazala Irshad, reported from Cairo that the “self-proclaimed” anti-Muslim-Brotherhood militia “has female members.”

Egypt’s new Black Bloc (self-proclaimed anti-MB militia) has female members too–just saw one running wearing niqab & angle-length skirt.

— Ghazala Irshad (@ghazalairshad) 25 Jan 13

The activist bloggers Gigi Ibrahim, Adel Abdel Ghafar, Bassem Sabry and Egyptocracy wrote that they were troubled by the development.

This black bloc is just trouble even if they have good revolutionary intentions but it definitely will be used against the revolution

— Gigi Ibrahim (@Gsquare86) 25 Jan 13

Black Bloc: anarchist revolutionaries or 18 year olds who live with their moms & wear black masks thinking life is a video game ? #egypt

— Adel Abdel Ghafar (@dooolism) 25 Jan 13

The formation of a group like the “Black Bloc” is a natural result of events in #Egypt. I expect more groups like that, which worries me.

— Bassem Sabry باسم (@Bassem_Sabry) 25 Jan 13

Black Bloc might have started by youth trying to fight the unjust regime, but they could easily be infiltrated and tarnished. #Egypt

— Egyptocracy (@Egyptocracy) 26 Jan 13

This post was revised after publication to reflect comments on Twitter by the journalist Ghazala Irshad, who asked us to clarify that she was merely reporting on the presence of the Black Bloc, not admiring them as we first reported.

Additional reporting was contributed by Robert Mackey.

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4 tips for creating a successful Twitter parody account

The guy behind @GowanusDolphin learned his lesson the hard way

A chorus of Twitter elite got really angry on Friday when an opportunistic user decided to register @GowanusDolphin, a horrible account that premised itself on a dolphin trapped in New York‘s murky Gowanus Canal. 

Not sure how I feel about parody account @gowanusdolphin. Poor guy. Don’t find funny at all.

SEE MORE: Connecticut massacre suspect: How the media IDed the wrong guy [Updated]

— Craig Kanalley (@ckanal) January 25, 2013

I don’t think I’m exaggerating when I say that this @gowanusdolphin account is far worse than the Holocaust.

— Joel Johnson (@joeljohnson) January 25, 2013

It’s because we all laughed at the fake Rahm Emanuel guy that these fucking things exist. We brought @gowanusdolphin on ourselves.

SEE MORE: The 17 most memorable tweets of 2012

— Cord Jefferson (@cordjefferson) January 25, 2013

The offender, who has since apologized for being a jerk, learned his lesson the hard way. Don’t let the same fate befall you. Here, four helpful tips for creating a successful* Twitter parody account should the opportunity ever arise again:

1. Don’t use animals
Remember @BronxZooCobra fondly? Neither do we. Predicating your shiny new Twitter handle on a headline-grabbing animal is difficult for two reasons: (a) Animals don’t talk. You’re creating its voice from scratch; and (b) People tend to like animals more than they like other people, so as a rule of thumb, you should probably be making fun of actual human beings.

SEE MORE: Social media masters, ninjas, and gurus: How Twitter pros describe themselves

2. Don’t base it on news
When a mild 5.9-magnitude earthquake rattled New York in 2010, Twitter exploded with parody accounts. (“Boom!” and “Whoa!” and that sort of nonsense.) None of them were funny. None of them were sustainable. Take a lesson from Bloomberg social media director (and the web’s leading voice in parody account hatred) Jared Keller:

If you create a parody account within fifteen minutes of a news event you are the worst person on the planet and I hate you.

SEE MORE: Instagram vs. Twitter: Why their beef is bad news for you

— Jared Keller (@jaredbkeller) January 25, 2013

3. Be funny
Ha ha, you have to actually be funny, which is easier said than done. And “humor,” as we all know, is 100 percent subjective and varies from person to person, NOT TO MENTION it requires constant mental dexterity that 99.99 percent of the population simply isn’t cut out for. So make it easy for yourself. Self-impose some parameters and employ a weird spin like @NYTOnIt or @__MICHAELJ0RDAN. Maybe you’ll even get a book deal! (Probably not.)

4. You probably shouldn’t make a parody account
Ignore everything I just said. Don’t make one. Sorry.

SEE MORE: Should Twitter be forced to reveal racist users?

*Just kidding.

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Azarenka wins back-to-back Australian titles

MELBOURNE, Australia (AP) — Victoria Azarenka won her second consecutive Australian Open title, beating Li Na 4-6, 6-4, 6-3 in a final that included a break for fireworks, two medical timeouts and a nasty fall to the court by Li.

The Chinese star first tumbled to the court after twisting her left ankle in the fifth game of the second set and had it taped.

On the first point after a 10-minute pause in the third set while fireworks boomed overhead from nearby Australia Day celebrations, Li fell over again and slammed the back of her head on the court. The 2011 French Open champion was treated and had another timeout before being allowed to resume the match.

Azarenka, who broke down in tears and sobbed into her towel when the match ended, won five of the next six games to claim her second major title and retain the No. 1 ranking.

"Unfortunately, you have to go through some rough patches to achieve great things. That's what makes it so special for me," she said. "I went through that, and I'm still able to kiss that beautiful trophy."

Serena Williams, who lost in the quarterfinals, will become the new No. 2 in the rankings.

Americans Mike and Bob Bryan won their record 13th Grand Slam doubles title, defeating the Dutch team of Robin Haase and Igor Sijsling 6-3, 6-4. They had been tied with the Australian greats John Newcombe and Tony Roche with 12 major titles.

The women's 2-hour, 40-minute match featured 16 service breaks, with Li losing her service nine times.

On a crisp Saturday night, Azarenka won the coin toss and elected to receive, a ploy that seemed to work when a nervous Li was broken to start the match. After a double fault on the first point, Li's forehand long gave Azarenka the early lead.

When she first injured her ankle, Li was trailing 3-1 in the second set. When she came back, she won three of the next four games to tie it 4-4, but Azarenka broke back and then held her serve.

Azarenka broke in the opening game of the final set, just two games before the match was suspended for the fireworks, a planned stoppage of play that both players were notified about before the match.

While Azarenka jogged around and practiced her serving motion during the 10-minute fireworks break, Li sat on her courtside chair for most of the stoppage.

It was on the first point that she again fell to the court.

Li said she went "totally black" for two seconds after her head hit the court, and when a medical official asked her to follow her finger, "I started laughing, thinking 'This is a tennis court, not like a hospital.'"

Li said the tournament doctor saw her after the match and checked out her head and neck.

"I should be OK,' Li said.

From the outset, the capacity crowd at Rod Laver Arena was firmly behind Li, cheering loudly when she was introduced. Meanwhile, Azarenka's errors were applauded, and one spectator even mocked the loud hooting sound she makes when she hits a shot.

The chill from the crowd was a remnant of Azarenka's semifinal win over American teenager Sloane Stephens, when Azarenka was criticized for taking a questionable 10-minute medical timeout near the end of the match. She was accused of taking the time out to compose herself after she'd wasted five match points while serving for the match against Stephens. Azarenka said she needed the time out because a rib injury was making it difficult for her to breathe and she had a knee injury.

In the second set Saturday, a few fans heckled Azarenka. One man yelled, "Take a deep breath, Vicky."

By the end of the match, she appeared to have won some of the fans back. Azarenka's friend, rapper Redfoo, yelled down to her from the player box "You deserve it," and she later blew kisses to the crowd. Someone else in the crowd shouted "Victoria, we love you."

Azarekna appeared to quickly forgive the crowd, saying during the trophy presentations that she wanted to thank the fans for their support.

"I will always keep very special memories of this court and it will be in my heart forever," she said, pausing several times to find the right words. "Of course, I (almost) forgot to say congratulations to Li Na, she's had a terrific start to the year ... hope to see you in many, many more finals."

Later, Azarenka said she expected a "way worse" reception from the crowd.

"You just have to go out there and try to play tennis in the end of the day," she said. "The things what happened in the past, I did the best thing I could to explain, to do everything I could, and it was left behind me already."

Azarenka and Li had met twice before in Grand Slam tournaments, with Li winning both times — in the fourth round of the 2011 Australian Open and quarterfinals at the French Open. Li lost the 2011 Australian Open final to Kim Clijsters but won her first Grand Slam title at Roland Garros a few months later, beating Francesca Schiavone.

But after failing to advance past the fourth round at any major in 2012, Li hired Carlos Rodriguez, Justine Henin's former coach. The hard training he's put her through in the past four months appears to be paying dividends.

Li won a WTA tournament in China before travelling to Australia, where she advanced to the semifinals at the Sydney International.

In the men's final on Sunday, Novak Djokovic will attempt to win his third consecutive Australian Open against U.S. Open champion Andy Murray. Djokovic has had the benefit of an extra day off after an easy three-set win over David Ferrer on Thursday night, while Murray needed a tough five-setter to defeat Roger Federer.

Murray has predicted a tough match with long rallies against Djokovic, the player he beat in the final at Flushing Meadows in September.

"I'm ready for the pain," he said. "I hope it's a painful match, that will mean it will be a good one."

The Bryan brothers have six Australian Open doubles titles to go along with four at the U.S. Open, two at Wimbledon and one at the French Open.

In the other final Sunday to end the year's first Grand Slam, the unseeded pairs of Jarmila Gajdosova and Matthew Ebden of Australia and the Czech Republic's Lucie Hradecka and Frantisek Cermak play for the mixed doubles championship.

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Diner’s Journal Blog: PepsiCo Will Halt Use of Additive in Gatorade

PepsiCo announced on Friday that it would no longer use an ingredient in Gatorade after consumers complained.

The ingredient, brominated vegetable oil, which was used in citrus versions of the sports drink to prevent the flavorings from separating, was the object of a petition started on Change.org by Sarah Kavanagh, a 15-year-old from Hattiesburg, Miss., who became concerned about the ingredient after reading about it online. Studies have suggested there are possible side effects, including neurological disorders and altered thyroid hormones.

The petition attracted more than 200,000 signatures, and this week, Ms. Kavanagh was in New York City to tape a segment for “The Dr. Oz Show.” She visited The New York Times on Wednesday and while there said, “I just don’t understand why they can’t use something else instead of B.V.O.”

“I was in algebra class and one of my friends kicked me and said, ‘Have you seen this on Twitter?’ ” Ms. Kavanagh said in a phone interview on Friday evening. “I asked the teacher if I could slip out to the bathroom, and I called my mom and said, ‘Mom, we won.’ ”

Molly Carter, a spokeswoman for Gatorade, said the company had been testing alternatives to the chemical for roughly a year “due to customer feedback.” She said Gatorade initially was not going to make an announcement, “since we don’t find a health and safety risk with B.V.O.”

Because of the petition, though, Ms. Carter said the company had changed its mind, and an unidentified executive there gave Beverage Digest, a trade publication, the news for its Jan. 25 issue.

Previously, a spokesman for PepsiCo had said in an e-mail, “We appreciate Sarah as a fan of Gatorade, and her concern has been heard.”

Brominated vegetable oil will be replaced by sucrose acetate isobutyrate, an emulsifier that is “generally recognized as safe” as a food additive by the Food and Drug Administration. The new ingredient will be added to orange, citrus cooler and lemonade Gatorade, as well Gatorade X-Factor orange, Gatorade Xtremo citrus cooler and a powdered form of the drink called “glacier freeze.”

Ms. Carter said consumers would start seeing the new ingredient over the next few months as existing supplies of Gatorade sell out and are replaced.

Health advocates applauded the company’s move. “Kudos to PepsiCo for doing the responsible thing on its own and not waiting for the F.D.A. to force it to,” said Michael Jacobson, executive director of the Center for Science in the Public Interest.

Mr. Jacobson has championed the removal of brominated vegetable oil from foods and beverages for the last several decades, but the F.D.A. has left it in a sort of limbo, citing budgetary constraints that it says keep it from going through the process needed to formally ban the chemical or declare it safe once and for all.

Brominated vegetable oil is banned as a food ingredient in Japan and the European Union. About 10 percent of drinks sold in the United States contain it, including Mountain Dew, which is also made by PepsiCo; some flavors of Powerade and Fresca from Coca-Cola; and Squirt and Sunkist Peach Soda, made by the Dr Pepper Snapple Group.

PepsiCo said it had no plans to remove the ingredient from Mountain Dew and Diet Mountain Dew, both of which generate more than $1 billion in annual sales.

Heather White, executive director at the Environmental Working Group, said of PepsiCo’s decision, “We can only hope that other companies will follow suit.” She added, “We need to overhaul how F.D.A. keeps up with the latest science on food additives to better protect public health.”

Ms. Kavanagh agreed. “I’ve been thinking about ways to take this to the next level, and I’m thinking about taking it to the F.D.A. and asking them why they aren’t doing something about it,” she said. “I’m not sure yet, but I think that’s where I’d like to go with this.”

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This post has been revised to reflect the following correction:

Correction: January 26, 2013

An earlier version of this article misspelled the surname of the 15-year-old who started a petition on Change.org to end the use of brominated vegetable oil in Gatorade. She is Sarah Kavanagh, not Kavanaugh.

A version of this article appeared in print on 01/26/2013, on page B1 of the NewYork edition with the headline: PepsiCo Will Halt Additive Use In Gatorade.

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