Just that really. DH has been playing football with him and noticed that ds gets very out of breath before he does (and he's not terribly fit!)
Ds swims, plays football, does athletics, plays on his trampoline whenever he can (never stops), so how can that be?
DH has suggested I take ds to the Drs as he doesn't think this can be right. Should I or is there something I can do. I should add that his diet is good - lots of fruit and veg and I cook most things from scratch.
Any advice gratefully received!