I love the clamshell exercise, too. I do this simple movement on the floor, from the comfort of my yoga mat (or carpet), and it's done more for my hip mobility, core stability, and glute (buttock) ...

12-minute bodyweight workout after 55, with exclusive quotes from certified trainer Michael Betts. Get the 6-move plan.

Recent scientific findings have upended long-standing assumptions about strength training. Research now shows that bodyweight exercises can lead to muscle growth comparable to traditional ...