I’ll be 73 tomorrow and I’m still training hard. I have been training for more than 50 years off and on. Over the time I have developed some minor injuries, and I train around them.
I don’t use bench presses and presses (I use dips and laterals) but for the rest I have no limits regarding exercises.
I vary my training every month or so, now I’m using full body workouts, sometimes I use upper/lower body splits.
Currently I rest 60 seconds between sets, but usually I try to work down to 30 seconds; I never do any cardio, except fast walking when I’m shopping.
The pic attached is taken last summer when I used 30 seconds of rest and was on a 100% keto diet.