Does Running Shirtless Keep You Cooler in Heat, Humidity?

On the muggiest, swampiest days of summer, you’ve no doubt questioned if running shirtless is the best way to beat the heat. But before you start thinking about how to kit up or strip down, you should understand what happens to your body in the heat.

“When you exercise, you use energy that’s stored in your body to perform the work,” explains Samuel N. Cheuvront, Ph.D., a research physiologist who studies fluid balance and endurance exercise. “But only about 20 percent of all the energy we’re generating when we exercise actually goes toward performing the physical work; the rest of it is turned into heat.”

Your body has a limited capacity for storing that heat energy. So when your brain senses your body temperature has increased, it elicits two responses: It shunts more blood flow to the skin, where increased vasodilation—a widening of the blood vessels at the skin’s

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Seniors In Low-Income Housing Live In Fear Of COVID Infection

Davetta Brooks, 75, who has heart failure, a fractured hip and macular degeneration, is afraid. Conditions in her low-income senior building on Chicago’s Near West Side — the Congressman George W. Collins Apartments — are “deplorable,” she said.

Residents are not wearing masks or gloves to guard against the coronavirus, she said: “They’re touching everything on the elevator, in the laundry room. And anybody and everybody’s relatives and friends are coming in and out with no scrutiny.”

No one is checking on residents to see if they need help, Brooks said. And no one seems to know whether residents have tested positive for COVID-19 or died, though ambulances have screeched up to the entrance several times.

“This building is not safe,” she said in mid-June. “With all the things happening in the U.S., this is what ‘seniors lives don’t matter’ looks like.”

Nationwide, more than 1.6 million older adults live

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What Every Runner Can Learn From the 2-Hour Marathon

“Most people remember Breaking2 as a spectacle. Three runners, pacers, big crowds, and a race track in Italy, trying to break one of the last great thresholds in sport. But it started years earlier, humbly, on a whiteboard,” says Brett Kirby, a Human Performance Researcher at the Nike Science Research Lab (NSRL) who quarterbacked the project.

Kirby, a self-described academic, holds a Ph.D. in Biomedical Sciences and taught at both Duke and University of Oregon, before his current tenure at Nike. He studies the physiology of the world’s best athletes–how cardio, neurological, and muscular systems work together. “It’s a blend of art and science,” he explains. “A holistic view of athletes, helping them progress to the best of their ability.”

Photo: Courtesy of NIKE

The NSRL is a team of 60 from widely diverse backgrounds: bio-mechanical researchers, computer scientists, behavioral experts,

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