the age thing is so weird...
the only things i do differently now (at 43) is that i do ALOT of warm up sets for my shoulders before i even look at a heavy weight... i no longer do squats because, well, when you are thinking more about how badly your knees hurt (top of the knee cap) verses say good form and getting the weights up, that is a bad thing ( although i can use a 45 deg sled with no issues, yeah i know sounds odd.... beats me why that is) . i dont recover as quickly ( i hit each bodypart twice a week)...and im not as strong but my musculature is way way improved over the 20-30 yo me. Odd that im weaker but look 5 x bigger.
oops left this out... i dont do sprints anymore either.... regardless of how warm i think i am... ive pulled a hammy 2 x ...im done lol....(racing my kid, was kicking his butt, then BLAMO!!!..to me sounded like a rifle went off... not sure if it was actually audible... def felt like a rifle had shot my hammy lol...) yep, no more sprinting. all this "pro athlete playing through the pain" bs ..let me tell u this.. if u REALLY pull a hammy , u aint walking that off...LeBron didnt walk off that cramp did he?