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.

If you’ve ever held a plank, paused at the bottom of a squat or pressed your palms together in front of your chest, you’ve done an isometric exercise. Ta-da! These holds might look simple — after all, ...

Exercise is a vital component of heart health, but you don’t necessarily need to pour sweat in a high-intensity bootcamp class to reap the benefits. While aerobic, or cardio, exercise like running, ...