Exercise Physiology: Theory and Application to Fitness and Performance 9th Edition by Scott Powers, Edward Howley

Exercise 5

Discuss those factors thought to be responsible for regulating force during muscular contractions.

Step 1 of 4

Though the force generated in a single muscle fiber is related to the number of myosin cross-bridges making contact with actin, the amount of force generated in a group of muscles, during muscular contraction, is complex and is determined by three major factors given below:

• Number and types of motor units recruited

• The initial length of the muscle

• The nature of the neural stimulation of the motor units