In order to improve the conditions of your muscle system you could participate in aerobic activity.
this statement is correct.
I believe that the answer would be D., Water.
Water gives you alot of energy, believe it or not. If you
were not to drink water for days, you will feel very lazy
and down.
Hope this helps!
Experts recommend that teenagers exercise for at least one hour every day.
B - paying no attention to the dietary habits of those around you
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<span>C. Isotonic.
</span><span>Isotonic contraction produces tension and causes the muscle to shorten. It is the usual means of producing body movement. </span>
<span>Isometric contraction produces tension but the muscle does not shorten.It is used to strengthen joints.</span>