Answer: Ok so there's no number or letter answers but the answer is C. Hope this helps :)
Explanation:
C personal trainer I am so sorry if it’s incorrect
I would say hat now is the perfect time because peak bone mass happens at our age. Bone strengthening exercises are always good for your body no matter what, so encourage her/him to do it. I'm guessing the age is about 11-18 maybe...
Hope this helps... mark as Brainliest plz
Answer:
At least an hour a day of physical activity.
Explanation:
<span>A muscle contraction that results in no movement of the body is referred to as an isotonic contraction. The isotonic contraction can be </span>concentric and eccentric. C<span>oncentric </span>contraction results in the muscle shortening, because the force the muscle is producing is greater than the resistance. Eccentric isotonic contraction on the other hand results in muscle lengthening because<span> the resistance is being greater than the force the muscle is producing.</span>