The three-time medalist is behind the design of his prosthetic—and he uses it to train hard off-board, too.

Add Yahoo as a preferred source to see more of our stories on Google. Most gyms have plyometric boxes. They're also found in parks with public workout areas. Photo: Getty Images Building body strength ...

The box jump is a fun and dynamic exercise to add to any routine focused on improving power and lower-body strength. As a personal trainer, I love to include box jumps in my clients’ programming to ...

Lindsey Vonn needed to use a crutch to get around over the weekend. Now she’s performing box jumps, working out in a pool while wearing a weighted vest and skiing at high speed.

Jennifer Garner is working it out. On Sunday, April 13, the actress, 52, displayed her fitness skills in an impressive video posted on her Instagram Stories. In the clip, The Adam Project star could ...