Responses
It depends what kind of sickness or illness. If it's his stamina, I think doing sports would help him to be healthy or more like not getting sick that often. I just said this because I experienced the same thing, but it really depends.
Actually, sports specifically swimming can really help a lot of sickly kids.
“He was a really sickly child and that’s supposedly how he got into swimming” ???
Wouldnt swimming make things worse for most sick people?