True, and depending upon what kind of excersise you do will determine the quality of it. If you do excersise that is good for you, don't overwork yourself, you can burn excess fat, tone abs, and boot your immunity to diseases while helping your body function more coordinating.. but if you overwork yourself, and strain yourself farther than you can handle.. you can damage your muscles.. So excersising can change and does change your body and the way it functions.. be it negative or positive? That's up to how you do it.
To be honest, I'm not that sure on which one it is, but given choices lead me to think is the nervous system, probably because that's the reason our bodies are functioning, and compared to all other systems, the brain and the nervous system are needed for survival, otherwise you wouldn't be living.
Answer:
Unfortunately for some people, what may have been a small misunderstanding to them, was actually something that caused major problems for many others. Sometimes misunderstandings can have positive effects, other times they can have negative ones.
Explanation:
I just want ur points
