Multiple choice The maximum power originated in a skeletal muscle fibre is independent of initial length of the muscle occurs with an isometric contraction confides in the load moved by the muscle is independent of the load moved by the muscle Reveal answer Fill a bubble to check yourself C Correct answer Explanation As power = force x velocity, the maximum power depends on the load moved by the muscle. Too high a load and the muscle cannot shorten effectively; too light a load requires little power to move it.