MUSCLE PHYSIOLOGY

Detailed explanation-1: -An example of isometric muscle contraction is holding a book in the same position. A muscle contraction is isotonic if muscle length changes, but muscle tension remains the same. An example of isotonic muscle contraction is raising a book by bending the arm at the elbow.

Detailed explanation-2: -Isometric exercises are tightening (contractions) of a specific muscle or group of muscles. During isometric exercises, the muscle doesn’t noticeably change length. The affected joint also doesn’t move.

Detailed explanation-3: -Answer and Explanation: C. Pushing against an immovable wall is an example of an isometric contraction.