Changes in the force of contraction of the heart
<span>To show that exercise needs to be structured to maintain fitness</span>
Answer: Answer #2
Explanation: Due to muscle tissue being denser that fatty tissue, muscle mass weighs more than fatty tissue. This is why some who is short but really muscular will appear obese on a BMI machine. Brainliest please?
14:2 had to be Child CPR because adult is 30:2