The answer is all of the above
The large bone in the upper arm is called the humerus. The shoulder blade is called the scapula and the collarbone is called the clavicle.
Cooling down after exercising is just as important as warming up before exercising. They both provide a smooth transition between exercise and a state of rest. The main purpose of cooling down after exercise is to reduce the heart and breathing rates, gradually cool body temperature<span>, return muscles to their optimal length-tension relationships, prevent venous pooling of blood in the lower extremities, which may cause dizziness or possible fainting, and restore physiologic systems close to baseline.</span>
