Answer: Over-stressing the body will cause you to over-train, resulting in a reduction in performance or even injury.
Explanation: The overload principle is a fundamental concept in fitness. You will never witness increases in muscular strength, endurance, size, or aerobic fitness if you do not stress the body. Over-stressing the body will cause you to over-train, resulting in a reduction in performance or even injury.
Answer:
The lungs hold air that is breathed in. Oxygen gas in the air moves into the blood.
The heart pumps to transports this oxygenated blood to cells in the body that need it to produce energy.
Develop thoughts and feeling about one's self. Hope this helped (: