Specificity is the answer. Specificity is a principle that helps a person improve his or her abilities. Such as a runner wanting to improve his or her speed and cardiovascular endurance through running in a span of time.The t<span>raining must be matched to the needs of the sporting activity to improve fitness in the body parts the </span>sport<span> uses. </span>
They should take supplements and eat other protein rich foods like beans.
The heart is the system’s pump and the blood vessels are like the delivery routes and it is a muscle. The pumps are the beat.
The heart is a muscle about the size of a fist and it is the muscle in the body that works the hardest.
The statement that the heart muscle rests only between beats is true.
