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.

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.

Background Most studies of exercise-induced muscle injury have focussed on eccentric contractions, which are known to produce damage and delayed soreness. It is less well known that isometric ...