Trainer tips: Keep your front heel planted on the floor and your front knee above your front foot. Engage your core and keep ...

This 20-minute routine, requiring only your body weight, is perfect for you. By alternating between full-body, upper, and ...

Plank passthrough, plank drag — whatever you call it, this core exercise engages muscles from head to toe as you maintain a plank while dragging a weight from side to side. It tests core strength, ...