I also have the right genetics; aka longevity gene(s), Ashkenazi Jew markers, etc and my farther is in his upper 80's; his mother lived to 98.
I don't want to claim that it's any one thing. I'm sure it's everything. The Tabata style sprinting 2-3 days a week, the hour+ workouts minimum of 5 days a week, the 16/8 fasting, the hockey/cryotherapy-like effects of being cold and working out/aerobic exhaustion of being on the ice or skating outside etc. And of course diet... I eat much much less than most people I know (big fan of Paleo menu by Green-Chef).
The way I see it is there are studies around NMN, metformin and resveratrol right now; let's say in 10 years they all prove they slow aging/extend life... to me it's worth the cost to take these now and bet on a positive outcome. If some of these studies don't pan out, so it goes, but so far it seems like it's working out pretty well if my increasingly annoyed friends are any indication.