Posts Tagged ‘running’

By Donna Lu

High-tech shoes are making running more efficient – eventually, they could help us run more than 50 per cent faster.

David Braun and Amanda Sutrisno at Vanderbilt University in the US, modelled the energy used during running and the factors that can affect that – including air resistance, the limited power of a human leg, and the losses that occur each time a foot hits the ground.

They found that the leg only supplies energy about 20 per cent of the time that a person’s foot is on the ground. To improve upon that, they have conceptualised a spring-powered device that would increase the amount of power a person’s legs generate while running.

An exoskeleton connected to each foot that contains a programmable spring would allow the leg to supply energy 96 per cent of that time, according to their analysis.

The device would store energy created as the leg bends in the air, compressing the spring, and release it when the runner takes a step. It would also lessen collisional energy loss. “I would compare this to a catapult that is pulled up in the air and then released on the ground,” says Bruan.

The stiffness of the spring in the envisioned device would need to be changeable. “The faster the running motion is, the stiffer the leg should be,” says Braun. The simplest way to do this would be to build in a way to change the active length of the spring, he says.

The researchers analysed the running style of 100-metre sprint world record holder Usain Bolt, who runs at a top speed of 12.3 metres per second. The device would in theory boost Bolt’s top speed to 20.9 metres per second.

Even if the device increased the proportion of time the legs are generating power to only 60 rather than 96 per cent, it would still enable a theoretical speed of 18 metres per second, says Braun.

The researchers are currently building a prototype. Braun says the device could eventually be used by the military, but also for recreational purposes. “People love things that allow them to move faster,” he says.

Journal reference: Science Advances, DOI: 10.1126/sciadv.aay1950

Read more: https://www.newscientist.com/article/2238609-spring-powered-shoes-could-help-us-run-more-than-50-per-cent-faster/#ixzz6HnsLNJ3H


A US Coast Guard helicopter hovers as it lowers a rescue basket to hoist the runner out of the park.

By Madeline Holcombe

A runner crawled for nearly eight hours to find help after injuring his leg in a national park in Washington, authorities said.

“Carrying a charged cell phone and displaying incredible grit and determination to self-rescue likely prevented more serious injury in this case,” Jefferson County Search and Rescue said in a statement posted on Facebook.

Around 5 p.m. Friday, the runner was injured on the Duckabush River Trail in the Olympic National Park, Washington, according to the release. He was about 10 miles from the trailhead and his cell phone did not have a signal so he couldn’t call for help.

“I wasn’t counting on my phone ever working I just figured this is my only chance I’m going to crawl all the way there,” Joseph Oldendorf told CNN affiliate KIRO. Oldendorf said his tibia became detached, keeping him on his hands and knees. Crawling on the trail made his knees so raw, he said he put his shoes over them for a level of protection.

Temperatures were below freezing, and he was wearing only light running clothes as he crawled for several miles, the release said. At 12:45 a.m. on Saturday, he realized his phone had a signal because he received a text message.

He called 911 and kept crawling, the release said.

Oldendorf told the station that he tried lying down to wait, but he was too cold and believed that if he didn’t keep moving he could die. Thoughts of his family kept him going, he said.
“I don’t want my family to hear I died in the wilderness. I think it’d be unbearable,” Oldendorf told the station.

A crew from the Brinnon Fire Department along with Jefferson Search and Rescue volunteers responded and started up the trail to find the injured runner. A Jefferson County Sheriff’s deputy managed coordination and communication at the trailhead, the release said.

The runner was located by his voice five to six miles from the spot where he was injured, the release said. Fire department EMT’s treated him for a leg injury and exposure to the cold.

The rescuers then moved the runner to a spot where be hoisted by a US Coast Guard helicopter and flown to Harborview Medical Center in Seattle. The trail is on the east side of the Olympic Peninsula, about 50 miles west of Seattle.

The incident renewed his respect for nature, Oldendorf told KIRO, and he hopes to one day return to the trails.

https://www.cnn.com/2020/02/23/us/washington-runner-injured-crawled-eight-hours/index.html


Carissa Liebowitz (at right, in the purple shirt)

‘Running is a safe space… we can scrape the barrel of our souls and go back to our regular lives without repercussion.’

If left to our own devices with free time and adequate resources, what would we choose to do?

While in Nepal recently, en route to reach the starting line of the Everest Marathon, I found such happiness in trekking daily, falling asleep at 7:30 p.m., and no agenda other than to take in the beautiful scenery and move my body.

It helped, of course, to be led by someone else. To not have to give any thoughts about where I was going, how I was going to find food or shelter, or what I needed to do to prepare for the next day.

But if I shake away the potential complications, I am left with how I like living. Using my body for moderate work pretty much all day with periods of adequate rest, time for reflection, minimal internet connectivity, and at peace.

I think about the things that some people would find moderately uncomfortable and those are the things I enthusiastically embraced. Crawling into my sleeping bag with a layer of dust. Surprise meals prepared in a traditional way. Rest days with light hiking.

In much of the first world, we have evolved to live in a 72° environment with infrequent activity. Our biggest challenges are keeping our inboxes clear and deciding what’s for dinner.

I like the idea of hiking for a long period of time. As a sense of accomplishment, yes, but also, as a sense of being in nature for extended periods of time. And of course, the reality of not dealing with the day-to-day is ultimately appealing. No bills, no housework and no commuting.

I wonder about the lack of communication if I were solo. I came to truly enjoy the camaraderie of breaking bread or unpacking a life story during a shared experience.

Snippets of dark life moments came out and these are the kind of things that you trust to people that you share a close and physical experience with. I heard more recently that these are evolutionary behaviors — the strenuousness of the physical breaks down the filters of social norms.

When we sit in a comfortable space without struggle, our inclination is to hide these things away. Even in our close friendship circles or family, our darker secrets are not shared. Perhaps because of the fragility of the relationship?

But if there is nothing to lose, it becomes easy to unload the burdens on a stranger. Our relationship could be nothing at best and that wouldn’t change the state of affairs. But it could strengthen our bond and push us to outcomes we’ve only dreamed of.

Friendships forged over miles of running are built on the same foundation. The higher the level of suffering, the more it seems we are willing to open up and offer the true versions of ourselves.

I’ve found that I’m the most authentic version of myself in the midst of a long training run or deep into a tough race. The things I might caution myself from sharing with a non-running friend over coffee suddenly fall easily out of my mouth when my legs are tired and my heart rate is high.

While running, I might be more apt to open up about my struggles with my husband’s multiple sclerosis battle or share my very undecided thoughts on spirituality.

I’ll give you all the details about my eating disorder in high school and losing my job, 15 years into my career. Running is my safe space. There is an unspoken notion that we can scrape the barrel of our souls and go back to our regular lives without repercussion.

It’s not just me either. The skeletons (and treasures!) slip out of my running friends’ closets too. Many of them I know on a more personal level after just a few runs than some friends I’ve known half of their lifetimes.

As we dig a little deeper physically, we dig a little deeper psychologically and in the discomfort of our bodies, we somehow find our comfort zone.

https://halfmarathons.substack.com/p/carissa-liebowitz-on-how-running?token=eyJ1c2VyX2lkIjozNzY4NzIsInBvc3RfaWQiOjE3MjE1NSwiXyI6InVnNEVTIiwiaWF0IjoxNTc0MDAwMDEyLCJleHAiOjE1NzQwMDM2MTIsImlzcyI6InB1Yi0xMzczIiwic3ViIjoicG9zdC1yZWFjdGlvbiJ9.K0w17guN-6eemVW90j3BDXEIef7AHDveH6OOzqgxsGw

By Jonathan Lambert

If you’re looking for motivation to take up running, perhaps this will help. A new study finds that people who run as little as once a week have a lower risk of early death compared with people who don’t run at all.

In fact, any amount of running was associated with a 27 percent lower risk of premature death. And researchers found no evidence that running more alters that number significantly, according to a new meta-analysis published November 4 in the British Journal of Sports Medicine.

“This is good news for the many adults who find it hard to find time for exercise,” says Elaine Murtagh, an exercise physiologist at Mary Immaculate College in Limerick, Ireland, who was not involved in the study. “Any amount of running is better than none.”

While this conclusion might seem obvious to runners, the science has been fairly mixed, says public health researcher Željko Pedišić of Victoria University in Melbourne, Australia. “Some studies found a significant benefit of running, but others did not,” he says.

Also unclear was whether the duration or intensity of running mattered. Researchers who study the effects of running think about the activity in terms of doses, as though it were itself a medicine. Pedišić says that while it might make sense that more running would yield greater health benefits, some studies have sparked debate by suggesting that higher levels of running — more than 250 minutes a week — could actually negate any benefits in terms of mortality.

Pedišić and his colleagues tried to make sense of these conflicting findings by pooling and reanalyzing data from previous studies, an approach known as a meta-analysis. They settled on 14 previously published studies, which collectively asked 232,149 participants about their running habits and then tracked their health over a period of time from 5 ½ to 35 years.

Over the course of each study a total of 25,951 participants died, allowing the researchers to look for statistical associations between running and risk of death.

The researchers found that runners, even those who reported running as infrequently as once a month, had a 27 percent reduced risk of death from any cause compared with non-runners. Each study differed slightly in how they defined a runner, making it difficult to say exactly how little running is necessary for a benefit, though Pedišić says taking just a few strides a week is almost certainly not enough.

Still, the lower risk of early death was more or less the same across all running doses, from running no more than once a week for less than 50 minutes to running every day for a weekly total of 250 minutes. “All these doses of running are significantly associated with lower risk of death,” Pedišić says. “There was no significant difference between frequency, duration or pace,”

“Not finding a trend does not mean that the trend does not exist,” Pedišić cautions. A trend could be too small to be detected within the sample size. Studying the health effects of heavy running can be difficult because there aren’t many people who run that much, he says.

While more evidence is needed to determine if there is an upper limit to how much running is beneficial, this study fits with other research finding health benefits for any level of activity, says Angelique Brellenthin, a kinesiologist at Iowa State University in Ames who was not involved in the study, “Any amount of physical activity that you can fit into your schedule is good for you,” she says.

Running just once a week may help you outpace an early death

ATHLETICS-MARATHON-BERLIN

 

Kenyan Eliud Kipchoge set a new world record for the men’s marathon on Sunday, clocking 2hr 01min 39sec to improve the previous world mark by more than a minute.

Below is a list of the last 10 men’s world records for the marathon, held over a distance of 42.195 km (26 miles).

2:01:39: Eliud Kipchoge (KEN) on 16/9/19 in Berlin

2:02:57: Dennis Kimetto (KEN) on 28/09/2014 in Berlin

2:03:23: Wilson Kipsang (KEN) on 29/09/2013 in Berlin

2:03:38: Patrick Makau (KEN) on 25/09/2011 in Berlin

2:03:59: Haile Gebreselassie (ETH) on 28/09/2008 in Berlin

2:04:26: Haile Gebreselassie (ETH) on 30/09/2007 in Berlin

2:04:55: Paul Tergat (KEN) on 28/09/2003 in Berlin

2:05:38: Khalid Khannouchi (USA) 14/04/2002 in London

2:05:42: Khalid Khannouchi (USA) 24/10/1999 in Chicago

2:06:05: Ronaldo da Costa (BRA) 20/09/1998 in Berlin

Every hour you run extends your life span by seven hours, a new study has revealed.

Scientists say that running just one hour a week is the most effective exercise to increase life expectancy.

This holds true no matter how many miles or how fast you run, the researchers claim.
For those that take this advice to heart and run regularly, they say you can extend your life span by up to three years.

The study, conducted at Iowa State University, reanalyzed data from The Cooper Institute, in Texas, and also examined results from a number of other recent studies that looked at the link between exercise and mortality.

Scientists found that the new review reinforced the findings of earlier research.
At whatever pace or mileage, a person’s risk of premature death dropped by 40 percent when he or she took up running.

This applied even when researchers controlled for smoking, drinking or a history of health problems such as obesity.

Three years ago, the same team conducted a study that analyzed more than 55,000 adults, and determined that running for just seven minutes a day could help slash the risk of dying from heart disease.

They followed participants over a period of 15 years, and found that of the more than 3,000 who died, only one-third of deaths were from heart disease.

Co-author Dr Duck-chul High-mileage runners also questioned if they were overperforming and if, at some point, running would actually contribute to premature mortality.
After analyzing the data in the new study, scientists determined that hour for hour, running statistically returns more time to people’s lives than it consumes.
In The Cooper Institute study, participants reported an average of two hours running per week.
The amount ran over the course of 40 years would add up to fewer than six months, but it could increase life expectancy by more than three years.

The researchers also determined that if every non-runner who had been part of the reviewed studies took up the sport, there would have been 16 percent fewer deaths over all, and 25 percent fewer fatal heart attacks.

Other types of exercise were also found to be beneficial. Walking and cycling dropped the risk of premature death by about 12 percent.

Dr Lee says scientists remain uncertain as to why running helps with longevity.

But he says it’s likely because the sport combats many common risk factors for early death, including high blood pressure and extra body fat, especially around the middle.

It also raises aerobic fitness, one of the best-known indicators for long-term health.
Running, however, does not make you immortal and the life expectancy rates don’t increase beyond three years.

Improvements in life expectancy generally plateaued at about four hours of running per week, Dr Lee said. But they did not decline.

Read more: http://www.dailymail.co.uk/health/article-4405252/Every-hour-run-adds-7-hours-lifespan.html#ixzz4e5eSXAzj

by JENN SAVEDGE

A new study has found that slower runners live longer than those who push the pace

For the study, which was published recently in the Journal of the American College of Cardiology, researchers surveyed about 5,000 people, including 1,100 runners and 4,000 people who identified themselves as “non-runners.” Participants in the non-running group did not engage in any type of regular exercise or strenuous activity.

Those in the “running” group were split into three groups depending upon how far, how fast and how often they ran. The study participants were men and women of various ages who were considered relatively healthy.

Researchers checked back with the group after 10 years and found (not surprisingly) that the runners had longer lifespans than their sedentary peers. But what was surprising was the longevity difference among the runners. Those with the lowest rate of death were the light joggers, folks who ran roughly two to three times per week for about 1 to 2.4 miles per session at a speed self-described as “slow.”

Next in line in terms of lifespan were the moderate runners, followed by the speedsters, who tied with the non-runners for highest mortality rate. That’s right, those who ran hard and fast had the same lifespan as those who never left the couch.

http://www.mnn.com/health/fitness-well-being/blogs/slow-running-better-for-your-health