Vollyball())
When serving, a player may not step on or over the end line until after
contacting the ball.

True

False

proteins is the answer

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.

answer(b) keep oxygenated and deoxygenated blood separate;