When a participant performs a push-up, a concentric movement occurs during which action?

When a participant performs a push-up, a concentric movement occurs during which action?

• A. Lowering the body toward the ground
• B. Holding at the bottom
• C. Pushing up to the starting position
• D. Returning to the ground after the push

Answer: (C)

Concentric contraction happens when a muscle shortens as it produces force to lift a load. In a push-up, the upward phase—pushing the body away from the floor and returning to the starting position—drives the chest, shoulders, and triceps to shorten their fibers to extend the elbows and push upward. That shortening is what defines the concentric action. Lowering toward the ground lengthens those same muscles under load (eccentric), holding at the bottom keeps a constant length under tension (isometric), and returning to the ground after the push is another eccentric lowering phase.

Concentric contraction happens when a muscle shortens as it produces force to lift a load. In a push-up, the upward phase—pushing the body away from the floor and returning to the starting position—drives the chest, shoulders, and triceps to shorten their fibers to extend the elbows and push upward. That shortening is what defines the concentric action. Lowering toward the ground lengthens those same muscles under load (eccentric), holding at the bottom keeps a constant length under tension (isometric), and returning to the ground after the push is another eccentric lowering phase.