Dear Dr. Donohue: Some time ago, I remember reading what you wrote about isometric exercises. It intrigued me at the time. I forgot the details. Will you have another go at it? -- K.R. Dear K.R.: ...

“An isometric exercise is a static exercise where you hold a muscular contraction without movement, as opposed to a dynamic exercise where the muscles are able to contract from their longest to their ...

Isometric, isotonic, and isokinetic exercises can all help you progress toward better physical fitness, but through very different techniques.