First off, I don't think anyone will care if you claim that as a 40''. Your shoulder is barely dislocated at all! Everyone knows: if vag thinks it's xx'', then it is, end of story.
Secondly...that is absolutely fucking phenomenal man. Holy shit. Jumping 40'' at your age after all this time....predominantly jumping on CONCRETE.
Do you have cybernetic joints? You have copped a lot of flack (mostly from me lol) but damn. That is impressive. If I was a hat-wearing guy it would be well-and-truly the fuck OFF. Well done.
Now please, don't do anything stupid, don't go and run a marathon or powerlift, just take 3-4 days off, rest, mediate, visualise, get sleep (no playstation til 4AM for god's sake), stretch, get a massage. Then go out there and do that same jump again with a lobber and DUNK! This is it buddy! You can do it now. Judgement day is here. Do your best!