Daniel. 20. Artist. College student. Connoisseur of randomness
Background Illustrations provided by: http://edison.rutgers.edu/
Reblogged from strongblrr  883 notes
fitemt70:

This is all well and good except an example of an isometric exercise could be a plank. In a pushup, the muscles still have a concentric (shortening) contraction and an eccentric (lengthening) contraction.Both exercises use an immovable object (the floor) but what makes it isometric is the muscle cannot overcome the resistance in order to contract. Your arms and chest are still moving to perform a pushup but to perform a plank the muscle does not move.

fitemt70:

This is all well and good except an example of an isometric exercise could be a plank. In a pushup, the muscles still have a concentric (shortening) contraction and an eccentric (lengthening) contraction.
Both exercises use an immovable object (the floor) but what makes it isometric is the muscle cannot overcome the resistance in order to contract. Your arms and chest are still moving to perform a pushup but to perform a plank the muscle does not move.