Answer:
a over load progression recover
How much weight you have. if your over weight it could be unheathy
A couple days I rlly don't know the exact sorry I think it is around three from what I heard but I will research more and let u know
I believe 1 would be both A and B.
I believe 2 would be B.
I believe 3 would be A.
I believe 4 would be B. Sorry if they are wrong and I hope this helps ;}