The Purpose of the Warm-Up Is To

The purpose of the warm-up is to:

A) Slowly increase the pulse rate to an aerobic level.
B) Facilitate vascular changes (splenic shunt) to accommodate aerobic exercise.
C) Gear up the energy metabolism,i.e.,increase the delivery of oxygen and nutrients to the working muscle,and raise the temperature to an optimal level for energy production.
D) Increase the elasticity of the muscle fibers,which helps to prevent muscle,tendon,ligament,and joint injuries,as well as improve muscle contraction and preserve muscle glycogen in addition to reducing the amount of lactic acid build-up in the muscles.
E) All of the above