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.

The effects of a repetition push-up exercise programme and a repetition combination isometric-isotonic push-up exercise programme upon muscular endurance as measured by maximum repetition of push-ups ...

VARIOUS lines of evidence, for example, involvement of sulphydryl groups and adenosine triphosphatase, suggest that the rate-limiting process for muscular contraction may be proton transfer. In this ...