I'm a big calisthenics nerd, and I agree with this. For reference, I'm a rounding error away from 50 and I still do advanced bar work - muscle ups, archer pull

I'm a big calisthenics nerd, and I agree with this. For reference, I'm a rounding error away from 50 and I still do advanced bar work - muscle ups, archer pullups, pull overs, etc... I think it's important to always work with your bodyweight. 80% of strength is neuronal coordination, you'll get strong with the way you train. Use your bodyweight in closed kinetic chain [1] exercises and avoid the machines unless you're injured or have a specific reason. There are progressions for every level. I recommend "Be your own gym" and "Overcoming Gravity" for great references on bodyweight training. (Also: don't do muscle ups. The only people who like that are sports medicine docs.) [1] https://en.m.wikipedia.org/wiki/Closed_kinetic_chain_exercises#:~:text=Closed%20kinetic%20chain%20exercises%20or,the%20base%20of%20a%20machine https://en.m.wikipedia.org/wiki/Closed_kinetic_chain_exercis....