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Health

Exoskeleton Fits: A New System to Assist You Stroll and Run Higher

Lower body exoskeletons and exo-suits are already being used in some rehabilitation facilities and laboratories to improve walking ability in stroke patients, elderly and young people with cerebral palsy or other disabilities. But perhaps the most compelling and annoying science today is about exoskeletons for the rest of us, including young and healthy people. In this research area, scientists are developing exoskeletons to reduce the energy costs of running and walking, and to make these activities less tiring, more physiologically efficient, and possibly more enjoyable.

So far, the first results seem promising. In a series of studies conducted at Stanford University’s Biomechatronics Lab last year (and funded in part by Nike, Inc.), researchers found that college students were able to run about 15 percent more efficiently than normal on a treadmill when they wore a customizable prototype version of a lower leg exoskeleton. These exoskeletons feature a motorized, lightweight frame that straps around the runners’ shins and ankles and a carbon fiber rod that is inserted into the soles of the shoes. Together, these elements reduce the amount of force that runners’ leg muscles need to use to move them forward. The authors of the study estimate that we could run at least 10 percent faster on real paths and trails with the devices than on our own.

A slightly optimized device also increased the speed of young people walking, according to a separate experiment by the Stanford Laboratory published in April. In this study, students walked about 40 percent faster on average when wearing a powered exoskeleton prototype, while burning about 2 percent less energy.

In essence, exoskeleton technology could be thought of as “analogous to e-bikes,” but for walking, not pedaling, said Steven Collins, professor of mechanical engineering at Stanford and senior author of the new studies. By reducing the amount of exercise, the powered machines could theoretically encourage us to move around more, perhaps commuting on foot, hanging out or dropping by with naturally faster spouses or friends, and reaching places that might otherwise seem dauntingly hilly or far away.

They might even allow our muscles to power our cell phones, according to one of the more surprising new exoskeleton studies. In this experiment, published in Science in May, healthy young volunteers from Queen’s University in Kingston, Ontario wore an exoskeleton that contained a backpack with a small generator attached to cables that ran to their ankles.

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Health

Need a Coronavirus Vaccine? U.S. Pharmacies Say Stroll Proper In

Just a few weeks ago, people were sneaking across state lines, designing websites to search the internet, and even trying to pay for coronavirus vaccination appointments.

In much of the US, getting vaccinated can be as simple as entering a pharmacy.

Earlier this week, President Biden urged pharmacies to provide walk-in vaccinations to encourage reluctant people to get the shot. He also announced a new federal website and phone number that will help people find the website that is closest to them.

“We’re going to make it easier than ever to get vaccinated,” Biden said on Tuesday.

Chains like Walmart, Walgreens, Safeway, and Stop & Shop have announced that they are now offering vaccinations for walk-in customers in some locations or in mobile clinics. Other pharmacies preceded the president’s announcement. Rite Aid said there would be a limited number of walk-ins last week, for example. Biden’s administration is expanding access to meet its goal of getting at least the first shot at 70 percent of American adults by July 4th.

Many of the chains qualified the offer and found that walk-ins are subject to availability and that it is better to make an appointment on the same day as well.

Federal health officials have also ordered drug stores and grocery pharmacies to offer second doses of the vaccine to people who received their first shot from another provider.

The Biden government is hoping for a surge in vaccinations before the Food and Drug Administration expects the Pfizer BioNTech vaccine to be approved for adolescents ages 12-15 early next week. The president has said age group is important in the fight against the virus because, while adolescents are not as susceptible to serious illnesses, they can still get sick and infect others.

Convenience isn’t the only way officials have encouraged people to get vaccinated. In exchange for a free vaccination against a potentially fatal disease, you can now get a ticket to a baseball game, a stiff drink, or $ 100.

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Health

The way to Stroll Safely within the Snow, Ice and Slush

This has been an extremely challenging winter, especially for people like me in the top decades who struggled not only with pandemic loneliness and limitations, but also with snow-covered roads and ice-covered sidewalks.

I take my little dog to the park every morning for his run on a leash and often had to rely on the friendliness of strangers to navigate ice-glazed trails so I could return home in one piece.

I don’t so silently curse the neighbors who took it to their retreats for the winter in Covid without making sure their sidewalks are shoveled when it snows, which it did with particular vengeance in New York City this February.

Many in my neighborhood who shoveled only created a narrow path for hikers and could not clear the snow from the inner part of the sidewalk, where part of it regularly melted during the day and re-frozen at night, leaving a piece of black ice for pedestrians in the morning to slip and fall. An older friend who lives alone landed on one of those icy spots and broke her wrist, a challenging injury, but at least her hips and head remained intact.

It’s not that I don’t know how to walk on icy surfaces. I review the guidelines every winter thinking I was well equipped, but last year’s relatively mild winter may have left me feeling complacent and not paying enough attention to what to put on my feet. I changed my boots three times the other day without finding a pair that could reliably hold me upright over snowy, muddy, and icy terrain, even though they all supposedly have good rubber treads.

Maybe I should have consulted the Farmer’s Almanac for 2021. Had I foreseen how bad it could get, I might have reviewed the lab-tested advice of a research team at the Kite Toronto Rehabilitation Institute-UHN about the best non-slip shoes. It would have alerted me that none of the boots in my closet are really good, especially for someone my age exposed to the conditions I encountered on the streets of Brooklyn and Prospect Park this winter.

With the aim of keeping Canadian bones intact through long, icy winters, the team, led by Geoff Fernie, Professor of Biomedical Engineering at the University of Toronto, tested 98 different types of winter boots, both for work and use, in 2016 also for leisure, and found that only 8 percent of them met the laboratory’s minimum standard of slip resistance.

Using the so-called Maximum Achievable Angle test method, the team evaluated the slip resistance of shoes in a simulated winter indoor laboratory with an icy floor that can be inclined at increasing angles. While they are fastened to a harness to prevent a real fall when slipping, the participants run uphill and downhill on the ramp in the tested shoes over bare ice or melting ice. Shoes that prevent slipping when the ramp is set at an angle of at least seven degrees receive a single snowflake rating. Two snowflakes are awarded for slip resistance at 11 degrees and three snowflakes for 15 degrees. But 90 styles of shoes that were originally tested through 2016 didn’t get snowflakes, and none got more than one snowflake.

In the past few years, things have improved. 65 percent of the boots tested in 2019 received at least one snowflake, said Dr. Fernie in an interview. The latest reviews, which are constantly updated, can be found online at ratemytreads.com.

He explained that two types of outsole, Arctic Grip and Green Diamond, offer the best traction on ice. Green Diamond acts like rough sandpaper with hard sand in the rubber sole, which works best on cold hard ice. Arctic Grip soles contain microscopic glass fibers that point downwards to provide a firm footing on wet ice. You may find some brands that use both technologies in the same sole for protection on both hard and wet ice.

Unfortunately, I’ve tried too late in the current snow and ice season to find a pair my size, one of the top rated boots that Dr. Fernie’s lab has tested. So, for the time being, I have to rely on the Yaktrax clamps I bought years ago and try to get them onto my existing shoes.

Fogging up properly or not, knowing how to safely walk on snowy and icy surfaces is worth it.

My # 1 rule: never go out without a properly charged cell phone, especially when you are alone. Take it slow and use handrails on steps when available. If there’s nothing to hold on to on slippery steps, go sideways.

Walk like a duck or a penguin. The attitude is far from glamorous, but it could help keep you out of the emergency room. Extend your arms to the side to improve balance. Keep your hands out of your pockets; You may need them to prevent a possible fall. And wear gloves!

Bend forward a little from your knees and hips to lower your center of gravity and keep it aligned over your front leg as you walk. With your legs apart, slightly twist your feet outward and take short, flat steps. Or if that is not possible, mix at an angle from side to side to move forward without lifting your feet.

Pay attention to your surroundings and look ahead as you walk to avoid tripping hazards. If you are using a stick, secure the end with an ice pick made for this purpose. An ordinary rubber-tipped stick is not much better on ice than slippery shoes.

Avoid heavy packages that can throw you off balance. I use a backpack to carry small items or when I buy something larger I use a shopping cart.

And know how to fall to minimize the risk of serious injury. When you start to fall backwards, quickly tuck your chin against your chest to avoid hitting your head and straighten your arms away from your body so that your forearms and palms, not your wrists and elbows, hit the ground.

If you fall forward, try to roll to the side on landing so that a forearm, not your hand, hits the ground first.

Getting up from an icy surface can also be a challenge. If you are not injured, turn on your hands and knees. With your feet shoulder width apart, place one foot between your hands, then bring the other foot between them and try to push yourself up.