Why it's basic: It's an excellent isometric exercise to strengthen the entire core and improve stability. How to do it: Lie on your back on a mat with your legs extended. Place your hands under ...

Why it's basic: It's an excellent isometric exercise to strengthen the entire core and improve stability. How to do it: Lie on your back on a mat with your legs extended. Place your hands under ...

Isometrics are exercises like planks and wall sits that strengthen muscles and tone the body. Because they are low-impact, isometric exercises help injury recovery and relieve joint pain.

Isometric, isotonic, and isokinetic exercises refer to the different techniques for activating and strengthening muscles. Isometric exercises, like planks, involve activating muscles with no movement.