Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. While many types of ...

Isometric exercises are exercises that involve the contraction of muscles without any movement in the surrounding joints. Most muscle strengthening exercises involve moving the joints, using the ...

“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 ...