The type of exercise in which muscle contraction occurs without moving the joint is called:

Correct option is A

Ans. (a) Sol. Isometric exercise involves muscle contraction without the joint moving, such as holding a position or resisting an external force. This helps build strength and endurance without joint movement.
Explanation of each option:
· (a) Isometric exercise – Correct. Isometric exercises involve muscle contractions where the muscle length does not change, and the joint remains stationary.
· (b) Isotonic exercise – Incorrect. Isotonic exercises involve joint movement and muscle contractions, like lifting weights or running.
· (c) Aerobic exercise – Incorrect. Aerobic exercise involves continuous, rhythmic activities like running, cycling, or swimming that engage large muscle groups and improve cardiovascular health.
· (d) Isokinetic exercise – Incorrect. Isokinetic exercises involve muscle contractions with controlled movement through a full range of motion, often using specialized equipment.