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But Metzl said that extreme exertion—i.e. burpees—release endorphins, which give us the boost we need to get through our day.

Jump your feet forward, in-between the dumbbells, and use your legs to stand up, performing a deadlift, holding a dumbbell in ...

In this high-intensity session, Kali Muscle, BigScBoy, and crew grind through 100 straight burpees, no shortcuts. Each rep ...

The workout, devised by The Body Coach app founder, Joe Wicks, is a 28-minute HIIT workout that uses a set of dumbbells.

I'VE TAUGHT HUNDREDS of fitness classes, and they all look relatively similar: heavy weights slamming, sweat dripping, clients grunting and panting. None of those high-intensity training sessions ...

Théo Lopez Marques hit a low point after surgery—then found an exciting new sport and built his body back up to new heights.

Texas' Lumin Fitness hopes its AI coaches and movement-tracking system can get more people exercising, co-founder Omeed Shams told Newsweek.

For my session, designed for backcountry skiers, that meant that I did the same workout as my classmates—but modified. After an aerobic warmup of jump rope and burpees, Sciolino adjusted my weights ...