The correct answer would be the resistance stage.
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Answer:
Your heart
Explanation:
The heart structure is made more complex because of the mechanisms that allow blood to be distributed throughout the body and return to the heart.
49.. 10 minutes of walking
50.68
Answer: A stress ball is a malleable toy no bigger than 7cm in diameter. Some stress relievers are made from closed-cell polyurethane foam rubber. These are made by injecting the liquid components of the foam into a mold. The resulting chemical reaction creates carbon dioxide bubbles as a byproduct, which in turn creates the foam. When you exercise pressure on a stress ball, the nerves and the muscles stimulate and contract, making them stronger. This, in turn, improves nervous system functioning and reduces essential hormones, which control and curb stress levels.