F.D.A. Panel to Vote on Restricting Hydrocodone Products Like Vicodin

Labels:




Trying to stem the scourge of prescription drug abuse in the United States, an advisory panel of experts to the Food and Drug Administration plans to vote Friday on whether to toughen restrictions on hydrocodone products like Vicodin, the most widely used narcotic painkillers in the country.




The recommendation, which the F.D.A. would likely follow, would limit access to the drugs by making them harder to prescribe, a major policy change that advocates said could help ease the growing problem of addiction to painkillers.


The change would have sweeping consequences for doctors, pharmacists and patients. Under the new rules, refills without a new prescription would be forbidden, as would faxed prescriptions and those called in by phone. Only written prescriptions from a doctor would be allowed and pharmacists and distributors would be required to store the drugs in special vaults. The vote comes after similar legislation in Congress failed last year, after intense lobbying by pharmacists and drugstores.


Prescription drugs account for about three-quarters of all drug overdoses in the United States, with the number of deaths more than tripling since 1999, according to federal data. Since 2008, deaths from overdoses have outpaced deaths from car accidents.


The F.D.A. convened the panel, made up of scientists and other experts, after a request by the Drug Enforcement Administration, which contends that the drugs are among the most frequently abused painkillers in the country.


“This is the federal government saying, ‘we need to tighten the reins on this drug,'” said Scott R. Drab, associate professor of pharmacy and therapeutics at the University of Pittsburgh. “Pulling in the rope is a way to rein in abuse, and consequently, addiction.”


At a two-day hearing at F.D.A. headquarters in Silver Spring, Md., many speakers opposed the change, including advocates for nursing home patients, who said older, frail residents needing pain medication would be required to make the arduous trip to a doctor’s office to continue using hydrocodone products. Other experts questioned how effective the change would be. Oxycodone, another highly abused painkiller, has been in the more restrictive category since it came on the market, but the limited access does not seem to have stemmed abuse, they said.


But others including parents who had lost their children to prescription drug abuse, as well as doctors and pharmacists, testified, sometimes emotionally. Senator Joe Manchin III, a Democrat of West Virginia, where the scourge has been particularly deadly, made an impassioned plea for tougher restrictions.


“When I go back to West Virginia, I hear how easy it is for anybody to get their hands on hydrocodone drugs,” Mr. Manchin said on Friday. “For underage children, these drugs are easier to get than beer or cigarettes.”


He added that the current, less restrictive status “is fueling the prescription drug epidemic today.”


Dr. James P. Rathmell, chief of the division of pain medicine at Massachusetts General Hospital, said hydrocodone products have similar biological effects as oxycodone products, and should unquestionably be in the same category of restrictiveness.


“Knowing what we know today, it was a mistake,” Dr. Rathmell said, referring to hydrocodone products being placed in the looser category when they came to market. “It should be corrected.”


Dr. Timothy Deer, chief doctor at the Center for Pain Relief in Charleston, W.Va., said that he feared for older patients, particularly in rural areas, who would have to drive great distances to get prescriptions renewed. But, he said, hydrocodone products have been by far the most widely prescribed painkiller because the restrictions were so loose. And on balance, particularly in a hard-hit state like his, the public health benefits of a recommendation to toughen restrictions on the drug probably outweigh the harm of additional burdens on legitimate pain patients.


“At the end of the day, the benefits of reducing abuse will outweigh the harm to legitimate pain patients,” he said. “This will likely reduce the amount of drug falling into the wrong hands.”


Read More..

DealBook: Rumble on Basic Cable, as Ackman Takes On Icahn Live

Labels:

For about 15 minutes on Friday afternoon, all of Wall Street was tuned into the battle that everyone wanted to see: William A. Ackman taking on Carl C. Icahn, live on air.

And the battle proved even stranger than anyone would have expected: Profanities were dropped; old battles were refought; taunts were slung.

Years of bad blood between the two hedge fund magnates spilled publicly onto CNBC’s airwaves, with Mr. Icahn deriding his younger counterpart as a “crybaby,” and Mr. Ackman declaring the veteran investor a “bully.” It was a smackdown that regularly prompted whoops from traders on the New York Stock Exchange floor, especially on the occasions that Mr. Icahn flung an occasional reference to bovine excrement.

Nominally, the two were set to talk about Herbalife, the health supplements company in which Mr. Ackman has publicly bet against. Speculation has ripped across Wall Street that Mr. Icahn has taken a contrary bullish bet on the company.

Of course, that’s not all that they argued about.

Instead, the two men squabbled over a nearly decade-old court case involving a real estate company, where Mr. Ackman sold his investment to Mr. Icahn. (You can read all about the lengthy battle here.) Mr. Ackman to this day alleges that Mr. Icahn reneged on a deal to share profits from a stock sale; the elder investor sees things differently.

How did that shape the battle between the two rich men? It became perhaps the financial world’s most-watched schoolyard match, in which Mr. Icahn shouted repeatedly and Mr. Ackman passionately argued his position at length.

Mr. Icahn dubbed Mr. Ackman “the crybaby in the schoolyard” and called his opponent “the quintessential example of on Wall Street, if you want a friend get a dog.” Clearly the more inflamed combatant, Mr. Icahn declared to his foe, “I wouldn’t want to invest with you if you were the last man on Earth.” He even picked a fight with CNBC host Scott Wapner, declaring him the bully. “I don’t give a damn what you want to know, I came on to talk about what I want to talk about,” the investor thundered, refusing to declare his position on Herbalife. [That said, Mr. Icahn mused that Herbalife could be "the mother of all short squeezes."]

For his part, Mr. Ackman repeatedly argued that Mr. Icahn was a bully who had taken advantage of a young investor stumbling in the early part of his career. The younger hedge fund manager repeatedly defended his bet against Herbalife, positing himself as the target of a major campaign by the health products marketer.

“He’s not an honest guy, he doesn’t live up to his word, and he takes advantage of little people,” Mr. Ackman flatly declared of Mr. Icahn.

Later in the exchange, Mr. Icahn sneered to his opponent, “I appreciate you called me a great investor.” Then he added, “I can’t say the same about you.”

And based on the reaction on Twitter, viewers could not get enough:

Read More..

India Ink: India Rape Trial Starts With Renewed Ban on Media Coverage

Labels:

The trial of five men accused in the gang rape of a 23-year-old woman in a moving bus in New Delhi is being watched closely as a symbol of India’s commitment to justice for women, but information about the ongoing court proceedings may be scarce.

As court proceedings began Thursday, the presiding judge said  there would be a blanket ban on reporting on the trial. The judge, Yogesh Khanna,  also warned defense lawyers, who have been openly speaking about the case, not to provide information about the proceedings to the press.

The five men accused in the Dec. 16 rape and murder of a physiotherapy student were ushered into the special fast-track court in South Delhi on Thursday at noon, flanked by policemen, with their faces were covered with gray woolen caps. During the two-hour court proceedings, the prosecution used the opening arguments to lay out charges against the men, which include gang rape, murder, robbery and destruction of evidence.

The police allege that the five accused men and a sixth teenager, who is being tried as a juvenile, committed a premeditated, vicious crime that included plans to kill their victim. The woman died nearly two weeks after the rape from injuries suffered during the attack, which included an assault with an iron rod. Her companion, a 29-year-old man, was also beaten, and is expected to testify  at the trial.

The court proceedings took place in room 305 of the Saket District Court complex, a small wood-paneled chamber. The next hearing will be on Monday, when the defendants’ lawyers will respond to the charges the prosecution has laid out.

Separately on Thursday, India’s Juvenile Justice Board rejected a plea that the juvenile, who according to school records is 17 years old, be tried as an adult. The petition, filed by Subramanian Swamy, president of the Janata Party, claimed that the extreme malice of the alleged actions of the juvenile showed that he was not of the “tender age and mind” of a juvenile.

Indian law requires that rape cases be held “in-camera,” allowing only those directly connected with the case to be present in the courtroom, to protect the victim’s identity, and bans publishing of information about the proceedings. The victim has not been named by the media, but her family has spoken openly to the press about her life and their willingness to let her name be used if it were for something that benefitted the public, like new legislation to protect women.

Some are agitating for the proceedings of this trial to be made public, because of the high profile nature of the case. “In this case, what is on trial is the criminal justice system — investigating agencies, the administration and the judiciary,” said Meenakshi Lekhi, a Delhi-based lawyer who has filed a petition in the Delhi High Court challenging the media ban.  The case has “brought women’s rights to the center stage of public discourse,” she said. “This would not have been possible without the media,” she said.

The High Court will hear the petition on February 13.

The new fast-track court will try only cases related to crimes against women, and once trials have started, they will not adjourn for weeks or months, as is common in other courts. Several fast-track courts have already  been set up in Delhi to hear crimes against women in the wake of the Delhi gang rape, which brought thousands of protesters to the streets demanding justice for the victim and other victims of sexual assault.

Judge Khanna ordered  Monday that all court proceedings in ths current case would take place “in camera,” allowing only those directly connected with the case to be present in the courtroom, reiterating an earlier magistrate’s order on the case. He also renewed a blanket ban Monday on the printing or publishing of any information relating to the case’s proceedings.

Defense lawyers were instructed by the court during the proceedings to “honor the spirit” of the gag order, they said, after the special public prosecutor Dayan Krishnan said he would file a petition of contempt of court if lawyers for the defendants continued to brief the media on developments.

V. K. Anand, the lawyer for Ram Singh, one of the accused, confirmed Thursday that he would now also represent Mr. Singh’s brother Mukesh. Mr. Anand and Vivek Sharma, a second lawyer for accused, told the media after Thursday’s court proceedings that they could not answer any further questions.

Read More..

Media Decoder Blog: A Resurgent Netflix Beats Projections, Even Its Own

Labels:

1:51 p.m. | Updated For all those who have doubted its business acumen, Netflix had a resounding answer on Wednesday: 27.15 million.

That’s the number of American homes that were subscribers to the streaming service by the end of 2012, beating the company’s own projections for the fourth quarter after a couple of quarters of underwhelming results.

Netflix’s growth spurt in streaming — up by 2.05 million customers in the United States, from 25.1 million in the third quarter — was its biggest in nearly three years, and helped the company report net income of $7.9 million, surprising many analysts who had predicted a loss.

The results reflected just how far Netflix has come since the turbulence of mid-2011, when its botched execution of a new pricing plan for its services — streaming and DVDs by mail — resulted in an online flogging by angry customers. Investors battered its stock price, sending it from a high of around $300 in 2011 to as low as $53 last year.

“It’s risen from the ashes,” said Barton Crockett, a senior analyst at Lazard Capital Markets. “A lot of investors have been very skeptical that Netflix will work. With this earnings report, they’re making a strong argument that the business is real, that it will work.”

Investors, cheered by the results, sent Netflix shares soaring. By Thursday afternoon the shares were up more than 37 percent to $141.49.

Netflix’s fourth-quarter success was a convenient reminder to the entertainment and technology industries that consumers increasingly want on-demand access to television shows and movies. Streaming services by Amazon, Hulu and Redbox are all competing on the same playing field, but for now Netflix remains the biggest such service, and thus a pioneer for all the others.

“Our growth and our competitors’ growth shows just how large the opportunity is for Internet TV, where people get to control their viewing experience,” Netflix’s chief executive, Reed Hastings, said in a telephone interview Wednesday evening.

Questions persist, though, about whether Netflix will be able to attract enough subscribers to keep paying its ever-rising bills to content providers, which total billions of dollars in the years to come. The company said on Wednesday that it might take on more debt to finance more original programs, the first of which, the political thriller “House of Cards,” will have its premiere on the service on Feb. 1. Netflix committed about $100 million to make two seasons of “House of Cards,” one of five original programs scheduled to come out on the service this year.

“The virtuous cycle for us is to gain more subscribers, get more content, gain more subscribers, get more content,” Mr. Hastings said in an earnings conference call.

The company’s $7.9 million profit for the quarter represented 13 cents a share, surprising analysts who had expected a loss of 12 cents a share. The company said revenue of $945 million, up from $875 million in the quarter in 2011, was driven in part by holiday sales of new tablets and television sets.

Netflix added nearly two million new subscribers in other countries, though it continued to lose money overseas, as expected, and said it would slow its international expansion plans in the first part of this year.

The “flix” in Netflix, its largely forgotten DVD-by-mail business, fared a bit better than the company had projected, posting a loss of just 380,000 subscribers in the quarter, to 8.22 million. The losses have slowed for four consecutive quarters, indicating that the homes that still want DVDs really want DVDs.

On the streaming side, Netflix’s retention rate improved in the fourth quarter, suggesting growing customer satisfaction.

Asked whether the company’s reputation had fully recovered after its missteps in 2011, Mr. Hastings said, “We’re on probation at this point, but we’re not out of jail.”

He has emphasized subscriber happiness, even going so far as to say on Wednesday that “we really want to make it easy to quit” Netflix. If the exit door is well marked, he asserted, subscribers will be more likely to come back.

The hope is that original programs like “House of Cards” and “Arrested Development” will lure both old and new subscribers to the service. Those programs, plus the film output deal with the Walt Disney Company announced in December, affirm that Netflix cares more and more about being a gallery — with showy pieces that cannot be seen anywhere else — and less about being a library of every film and TV show ever made.

“They’re morphing into something that people understand,” said Mr. Crockett of Lazard Capital.

Mr. Hastings said this had been happening for years, but that it was becoming more apparent now to consumers and investors.

Mr. Hastings’s letter to investors brought up the elephant in the room, the activist investor Carl C. Icahn, who acquired nearly 10 percent of the company’s stock last October. Mr. Icahn, known for his campaigns for corporate sales and revampings, stated then that Netflix “may hold significant strategic value for a variety of significantly larger companies.”

Netflix subsequently put into place a shareholder rights plan, known as a poison pill, to protect itself against a forced sale by Mr. Icahn.

The company said on Wednesday, “We have no further news about his intentions, but have had constructive conversations with him about building a more valuable company.”

Factoring in the stock’s 30 percent rise since November and the after-hours action on Wednesday, Mr. Icahn’s stake has now more than doubled in value, to more than $700 million from roughly $320 million.

A version of this article appeared in print on 01/24/2013, on page B1 of the NewYork edition with the headline: A Resurgent Netflix Beats Projections, Even Its Own.
Read More..

Question Mark: Why Am I Making So Many Pit Stops?

Labels:




There are those who have suggested that this feature appears to take an unseemly delight in the decline of the human body: ears that don't hear as well, spines that compress and curve, nose sensors that fade. And did we mention those hairs that start growing out of places other than the head? So we are happy to report on one thing baby boomers may find they do as well as well as ever: urinating. In fact, not only are they still doing it, they may well be doing it more often than ever. A lot more often.







Herman Wouters

Older men may feel more affinity for this  famous fountain in Brussels than they'd like.







O.K. It turns out this may be another one of those decline-of-the-human body pieces. Because for many people, their bedtime routine may now consist of reading, a strategic dash to the bathroom right before lights out, and a plea to Neptune to hold back the waters so they will make it through the night without having to get up.


Even if they do manage to do that, they may feel chagrined if they are parents and see their children roll out of bed, eat breakfast and head off to school without making a single pit stop. Your children may not be better people. But they may have better kidneys, said Dr. Sharon A. Brangman, a professor of medicine at SUNY Upstate Medical University.


People may urinate more as they get older for a number of reasons, including medical problems like hypertension or diabetes. It may also be a symptom of infection. “That’s often the first thing we look at when people complain of frequent urination,” said Dr. Tomas Griebling, vice chairman of urology at the University of Kansas and a spokesman for the American Urological Association. Some medicines can also be the cause.


Getting older, Dr. Griebling said, does not necessarily mean more trips to the bathroom. But many people do notice that they have to go more often, and often the explanation lies with normal changes in the body.


As people age, their kidneys may become less adept at concentrating urine and may draw in more water from elsewhere in the body, said Dr. Brangman, a past president of the American Geriatrics Society. This means more urine is produced and sent on to the bladder which, as it happens, is not getting any younger, either, and may be losing some storage capacity. The urethra, through which the urine exits the body, may also be shortening and its lining thinning.


Adding to the problem is that as people age, their bodies produce less of a hormone that lets them retain fluid. In women, estrogen levels also drop, a change associated with increased urination. And in men, as the prostate gets bigger, it may become harder to urinate, or to do so completely. (Men and women may also develop some incontinence, especially common in women who have borne children.)


Increased urination knows no time of day, but people seem to notice it more at night. The National Sleep Foundation says that when it surveyed people ages 55 to 84, two-thirds reported losing sleep at least a few times a week because of the problem.


Questions about aging? E-mail boomerwhy@nytimes.com


Booming: Living Through the Middle Ages offers news and commentary about baby boomers, anchored by Michael Winerip. You can follow Booming via RSS here or visit nytimes.com/booming. You can reach us by e-mail at booming@nytimes.com.


Read More..

The N.T.S.B. Sees Lengthy Inquiry Into 787 Dreamliner

Labels:


Deborah A.P. Hersman, chairwoman of the board, said a battery that caught fire in a 787 parked at a gate at Logan Airport in Boston showed signs of short-circuiting and of a “thermal runaway,” in which a chemical reaction begins to overheat the battery and speeds up as the temperature increases. But Ms. Hersman described these as “symptoms,” and pointedly declined to say whether those problems were the cause of the incident, which, combined with a similar event in Japan, has led to the grounding of all 50 of the planes in service.


     “These are all symptoms that something’s  wrong,” she said. “Understanding what came first and what triggered the next thing, that’s information we are working to identify.”


     While there were no deaths or injuries, she said, “These events should not happen.”


“There are multiple systems to prevent against a battery event like this,” she said. “Those systems did not work as intended. We need to understand why.”


Ms. Hersman highlighted the seriousness of the problems more bluntly than other officials have, and her comments made clear that Boeing will not be able to get its planes back in the air anytime soon.


The battery damage was so significant, she said, that investigators are having difficulty retrieving information from the battery control system.


Japanese aviation authorities are leading the investigation into the second battery incident, which occurred earlier this month on a 787 flown by All Nippon Airways. It made an emergency landing in Japan after its pilot reported a burning smell in the cockpit while smoke alarms rang.


Ms. Hersman’s briefing, the first by the safety board on the batteries, fleshed out some of the questions facing the forensic engineers but did not identify any cause as particularly likely, or rule any out. And some of the tests on the design of the battery take a week to conduct, she said.


With 50 airplanes grounded and Boeing’s marquee new product in limbo, engineers working for Boeing, its suppliers and government agencies in this country and in Japan are scrambling to determine what happened. But Ms. Hersman was not making any promises.


“It is really very hard to tell at this point how long the investigation will take,” she said. “What I can tell you is we have all hands on deck. We are working hard to determine what the failure mode here is and what actions have to be taken.”


“Lithium-ion” is a vague term that is used in the battery industry to describe a variety of chemistries. This particular battery was built specifically for the 787 and, according to the safety board on Thursday, used an aluminum strip coated in lithium cobalt oxide in its positive electrode. That is an older technology and is more prone to thermal runaway; it also generates oxygen as it heats, making combustion more likely.


 


Hiroko Tabuchi in Tokyo contributed reporting, and Christopher Drew and Jad Mouawad in New York.



Read More..

The Lede Blog: Clinton Testifies on Benghazi Attacks

Labels:

Visit NBCNews.com for breaking news, world news, and news about the economy

The Lede is following Secretary of State Hillary Rodham Clinton’s testimony Wednesday before the House Foreign Affairs Committee about the Sept. 11, 2012, attacks on the American Consulate in the eastern city of Benghazi, Libya, that killed Ambassador Chris Stevens and three other Americans. Earlier today, she testified before the Senate Foreign Relations Committee .

At a House Committee hearing last October investigating the attack, as reported on The Lede, State Department officials and security experts who served on the ground offered conflicting assessments about what resources were requested and made available to deal with growing security concerns in Tripoli and Benghazi.

Mrs. Clinton had been scheduled to testify before Congress last month, but an illness, a concussion and a blood clot near her brain forced her to postpone her appearance.

As our colleagues Michael R. Gordon and Eric Schmitt reported, four State Department officials were removed from their posts on last month after an independent panel criticized the “grossly inadequate” security at a diplomatic compound in Benghazi.

Read More..

Gadgetwise Blog: Sustainable Living in Your Headphones

Labels:

These days, the look of headphones is as important as the sound they produce, and the House of Marley knows it.

The company, which was founded on the vision of the reggae musician Bob Marley, tries to incorporate earth-friendly materials and craftsmanship in its latest line of over-ear headphones, called Rise Up.

The new collection, which was revealed at the recent Consumer Electronics Show in Las Vegas, uses materials like canvas and bamboo fiber over a frame of aluminum and steel. The headphones, which sell for $160, have a comfortable, yet durable feel, as if they would outlast their plastic competitors.

The headphones have a standard mic with a three-button controller that is integrated into a four-foot-long, tangle-free fabric cord secured to the right cup. They are relatively light, weighing about 2½ pounds, and come with a canvas carrying case.

One of the models bears a resemblance to the bright Rastafarian flag, but the one I tested, called the Saddle, was of a more muted brown and gray. The Saddle includes Rewind fabric, the House of Marley’s brand of textile that uses recycled materials like reclaimed hemp and organic cotton combined with fibers of recycled water bottles.

But the appeal of Rise Up headphones is more than their appearance; they sound great, too. The headphones are not noise-canceling, but they do use 50-mm dynamic drivers, which offer a rich, bass-heavy sound.

So, you can sit on the couch and listen to your music, smug in the belief that you’re saving the earth while you enjoy your tunes.

Read More..

Phys Ed: Is There an Ideal Running Form?

Labels:

In recent years, many barefoot running enthusiasts have been saying that to reduce impact forces and injury risk, runners should land near the balls of their feet, not on their heels, a running style that has been thought to mimic that of our barefoot forebears and therefore represent the most natural way to run. But a new study of barefoot tribespeople in Kenya upends those ideas and, together with several other new running-related experiments, raises tantalizing questions about just how humans really are meant to move.

For the study, published this month in the journal PLoS One, a group of evolutionary anthropologists turned to the Daasanach, a pastoral tribe living in a remote section of northern Kenya. Unlike some Kenyan tribes, the Daasanach have no tradition of competitive distance running, although they are physically active. They also have no tradition of wearing shoes.

Humans have run barefoot, of course, for millennia, since footwear is quite a recent invention, in evolutionary terms. And modern running shoes, which typically feature well-cushioned heels that are higher than the front of the shoe, are newer still, having been introduced widely in the 1970s.

The thinking behind these shoes’ design was, in part, that they should reduce injuries. When someone runs in a shoe with a built-up heel, he or she generally hits the ground first with the heel. With so much padding beneath that portion of the foot, the thinking went, pounding would be reduced and, voila, runners wouldn’t get hurt.

But, as many researchers and runners have noted, running-related injuries have remained discouragingly common, with more than half of all runners typically being felled each year.

So, some runners and scientists began to speculate a few years ago that maybe modern running shoes are themselves the problem.

Their theory was buttressed by a influential study published in 2010 in Nature, in which Harvard scientists examined the running style of some lifelong barefoot runners who also happened to be from Kenya. Those runners were part of the Kalenjin tribe, who have a long and storied history of elite distance running. Some of the fastest marathoners in the world have been Kalenjin, and many of them grew up running without shoes.

Interestingly, when the Harvard scientists had the Kalenjin runners stride over a pressure-sensing pad, they found that, as a group, they almost all struck the ground near the front of their foot. Some were so-called midfoot strikers, meaning that their toes and heels struck the ground almost simultaneously, but many were forefoot strikers, meaning that they landed near the ball of their foot.

Almost none landed first on their heels.

What the finding seemed to imply was that runners who hadn’t grown up wearing shoes deployed a noticeably different running style than people who had always worn shoes.

And from that idea, it was easy to conjecture that this style must be better for you than heel-striking, since presumably it was more natural, echoing the style that early, shoeless cavemen would have used.

But the new study finds otherwise. When the researchers had the 38 Daasanach tribespeople run unshod along a track fitted, as in the Harvard study, with a pressure plate, they found that these traditionally barefoot adults almost all landed first with their heels, especially when they were asked to run at a comfortable, distance-running pace. For the group, that pace averaged about 8 minutes per mile, and 72 percent of the volunteers struck with their heels while achieving it. Another 24 percent struck with the midfoot. Only 4 percent were forefoot strikers.

When the Daasanach volunteers were asked to sprint along the track at a much faster speed, however, more of them landed near their toes with each stride, a change in form that is very common during sprints, even in people who wear running shoes. But even then, 43 percent still struck with their heels.

This finding adds to a growing lack of certainty about what makes for ideal running form. The forefoot- and midfoot-striking Kalenjin were enviably fast; during the Harvard experiment, their average pace was less than 5 minutes per mile.

But their example hasn’t been shown to translate to other runners. In a 2012 study of more than 2,000 racers at the Milwaukee Lakefront Marathon, 94 percent struck the ground with their heels, and that included many of the frontrunners.

Nor is it clear that changing running form reduces injuries. In a study published in October scientists asked heel-striking recreational runners to temporarily switch to forefoot striking, they found that greater forces began moving through the runners’ lower backs; the pounding had migrated from the runners’ legs to their lumbar spines, and the volunteers reported that this new running form was quite uncomfortable.

But the most provocative and wide-ranging implication of the new Kenyan study is that we don’t know what is natural for human runners. If, said Kevin G. Hatala, a graduate student in evolutionary anthropology at George Washington University who led the new study, ancient humans “regularly ran fast for sustained periods of time,” like Kalenjin runners do today, then they were likely forefoot or midfoot strikers.

But if their hunts and other activities were conducted at a more sedate pace, closer to that of the Daasanach, then our ancestors were quite likely heel strikers and, if that was the case, wearing shoes and striking with your heel doesn’t necessarily represent a warped running form.

At the moment, though, such speculation is just that, Mr. Hatala said. He and his colleagues plan to collaborate with the Harvard scientists in hopes of better understanding why the various Kenyan barefoot runners move so differently and what, if anything, their contrasting styles mean for the rest of us.

“Mostly what we’ve learned” with the new study, he said, “is how much still needs to be learned.”

Read More..

Phys Ed: Is There an Ideal Running Form?

Labels:

In recent years, many barefoot running enthusiasts have been saying that to reduce impact forces and injury risk, runners should land near the balls of their feet, not on their heels, a running style that has been thought to mimic that of our barefoot forebears and therefore represent the most natural way to run. But a new study of barefoot tribespeople in Kenya upends those ideas and, together with several other new running-related experiments, raises tantalizing questions about just how humans really are meant to move.

For the study, published this month in the journal PLoS One, a group of evolutionary anthropologists turned to the Daasanach, a pastoral tribe living in a remote section of northern Kenya. Unlike some Kenyan tribes, the Daasanach have no tradition of competitive distance running, although they are physically active. They also have no tradition of wearing shoes.

Humans have run barefoot, of course, for millennia, since footwear is quite a recent invention, in evolutionary terms. And modern running shoes, which typically feature well-cushioned heels that are higher than the front of the shoe, are newer still, having been introduced widely in the 1970s.

The thinking behind these shoes’ design was, in part, that they should reduce injuries. When someone runs in a shoe with a built-up heel, he or she generally hits the ground first with the heel. With so much padding beneath that portion of the foot, the thinking went, pounding would be reduced and, voila, runners wouldn’t get hurt.

But, as many researchers and runners have noted, running-related injuries have remained discouragingly common, with more than half of all runners typically being felled each year.

So, some runners and scientists began to speculate a few years ago that maybe modern running shoes are themselves the problem.

Their theory was buttressed by a influential study published in 2010 in Nature, in which Harvard scientists examined the running style of some lifelong barefoot runners who also happened to be from Kenya. Those runners were part of the Kalenjin tribe, who have a long and storied history of elite distance running. Some of the fastest marathoners in the world have been Kalenjin, and many of them grew up running without shoes.

Interestingly, when the Harvard scientists had the Kalenjin runners stride over a pressure-sensing pad, they found that, as a group, they almost all struck the ground near the front of their foot. Some were so-called midfoot strikers, meaning that their toes and heels struck the ground almost simultaneously, but many were forefoot strikers, meaning that they landed near the ball of their foot.

Almost none landed first on their heels.

What the finding seemed to imply was that runners who hadn’t grown up wearing shoes deployed a noticeably different running style than people who had always worn shoes.

And from that idea, it was easy to conjecture that this style must be better for you than heel-striking, since presumably it was more natural, echoing the style that early, shoeless cavemen would have used.

But the new study finds otherwise. When the researchers had the 38 Daasanach tribespeople run unshod along a track fitted, as in the Harvard study, with a pressure plate, they found that these traditionally barefoot adults almost all landed first with their heels, especially when they were asked to run at a comfortable, distance-running pace. For the group, that pace averaged about 8 minutes per mile, and 72 percent of the volunteers struck with their heels while achieving it. Another 24 percent struck with the midfoot. Only 4 percent were forefoot strikers.

When the Daasanach volunteers were asked to sprint along the track at a much faster speed, however, more of them landed near their toes with each stride, a change in form that is very common during sprints, even in people who wear running shoes. But even then, 43 percent still struck with their heels.

This finding adds to a growing lack of certainty about what makes for ideal running form. The forefoot- and midfoot-striking Kalenjin were enviably fast; during the Harvard experiment, their average pace was less than 5 minutes per mile.

But their example hasn’t been shown to translate to other runners. In a 2012 study of more than 2,000 racers at the Milwaukee Lakefront Marathon, 94 percent struck the ground with their heels, and that included many of the frontrunners.

Nor is it clear that changing running form reduces injuries. In a study published in October scientists asked heel-striking recreational runners to temporarily switch to forefoot striking, they found that greater forces began moving through the runners’ lower backs; the pounding had migrated from the runners’ legs to their lumbar spines, and the volunteers reported that this new running form was quite uncomfortable.

But the most provocative and wide-ranging implication of the new Kenyan study is that we don’t know what is natural for human runners. If, said Kevin G. Hatala, a graduate student in evolutionary anthropology at George Washington University who led the new study, ancient humans “regularly ran fast for sustained periods of time,” like Kalenjin runners do today, then they were likely forefoot or midfoot strikers.

But if their hunts and other activities were conducted at a more sedate pace, closer to that of the Daasanach, then our ancestors were quite likely heel strikers and, if that was the case, wearing shoes and striking with your heel doesn’t necessarily represent a warped running form.

At the moment, though, such speculation is just that, Mr. Hatala said. He and his colleagues plan to collaborate with the Harvard scientists in hopes of better understanding why the various Kenyan barefoot runners move so differently and what, if anything, their contrasting styles mean for the rest of us.

“Mostly what we’ve learned” with the new study, he said, “is how much still needs to be learned.”

Read More..

Subscribe to: Posts (Atom)