Question

1. which activity best reflects a muscle movement working with gravity?

curling the arm during a bicep curl
lifting the torso during a sit up
lowering the body during a push up
extending the leg during a leg extension

Explanation:

When lowering the body during a push - up, gravity is acting in the same direction as the movement of the body. In a bicep curl (curling the arm), the muscle is working against gravity to lift the weight. When lifting the torso during a sit - up, the abdominal muscles are contracting against gravity. In a leg extension (extending the leg), the quadriceps are working against gravity to lift the lower leg (assuming there is a weight or resistance). But when lowering the body in a push - up, the force of gravity helps in the downward movement of the body, and the muscles (such as the triceps, chest, and shoulders) are eccentrically contracting (lengthening while under tension) to control the movement, which means the muscle movement is working with gravity.

Answer:

lowering the body during a push up