B. I think ????!!! I’m not really good with health
The answer is <span>Cortisol.
Hope this helped! Please make me the most Brainliest answer!</span>
Wll first of all start a little hard to see how much would be the most your friend can do and then go slowly so that the muscle gets used to fast movement but especially with a correct diet that must follow step by step.
I hope this works for you