fitness

How exercise works at the cellular level

We all know that exercise is good for us, but do we know why? How do those hours of sweating it out on a treadmill or pushing yourself in a weight training regimen actually help your cells and tissues to get healthier?

Two papers by separate groups may provide some intriguing answers. One team, led by researchers at the …

Fitness fades with age, more so after 45

Watch out for that mid-life speed bump—turns out age 45 is a doozy. A report published this week in the Archives of Internal Medicine upends conventional wisdom about fitness and aging.

Until now, most experts thought people’s fitness levels declined in a linear fashion as they aged. But the new report suggests the downward march …

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