I've been active most my life (60yo). I played basketball, football, and baseball in high school. I surfed for years while in the Navy. I ski (water & snow), snowboard, scuba, and still go to the gym and still fairly active. I cut my grass for the first time of this year on Saturday(one acre and it's hilly with a push mower) and the way my legs feel right now, here's how a 40 would go for me; I would be in my starting position and when I explode/launch from the start, I would likely go face first into the ground with a destroyed hammy. I could probably break my nose, an orbit, tooth, etc., but a sub 5, or 6, hell even a 7sec. 40 is an illusion of grandeur for this old man. In my prime, maybe a 5.5 and that's being generous. :rock: