I used to rep 315 no problem on the bench. Now - I never go above 225. Last time I tried 315, I felt this weird thing in shoulder like it was going to result in a tear. If we are injured, we can't train. If we can't train, then what? The cost / benefit analysis simply doesnt make sense to go really heavy any more.
We all want to see you succeed here. 
Success needs to come from a different mindset.
For me, it was being asked to do a Tough Mudder in 2013, and when I started training, realized I couldn't run a 5k without stopping multiple times.
Too many feel that running, sprinting, conditioning,etc will drop their reps on the bench or lose muscle or something, when it's just something that takes getting used to.
Condition + mobility can be combined with getting stronger after 40, and should be emphasized.