Ok so my father is 56 years old, he is in fairly decent shape for his age but he is at that point now where lifting hurts him for days (extreme muscle soreness) and he says he cannot gain any muscle whatsoever and may even be getting weaker after he works out. He eats pretty clean and will jog lightly every other day as well as lift lightly every other day. If he trys to go heavier on lifting he gets real bad DOMS. I guess my question here is two parts. First what type of training changes have you guys (45+ males) made to adapt to your aging. And are there any natty test boosters/AIs that may work well for someone my fathers age or should I just try and get him to talk to his doctor about hormone therapy or HGH? Also pertaining to the natty test booster he has also had a stint put in for a mild heartattack he had a few years ago so I am unsure if anything out there right now would be a bad idea for him to take. I was honestly thinking about something like PowerFull for him to help increase Test and GrowthHormone naturally but I dont want it to have and adverse effect on his heart or lipid levels. Any advice/info is much appreciated.