Anyone out there have experience with amino acid supplements? Especially as related to soft tissue injury recovery/prevention?
I have a almost 17 year old football player son. He is Punter/quarterback type so 6" 165lb or so. He has had some intermittent issues with hip flexor pain/inflammation. (he is also recovering from ACR replacement (not a football injury) so he is not punting yet) He has done some research that suggests amino acid supplements might help.
any input/experience on this? thanks