I’m 62 now and I guess I hit a wall late in 2015 after a few back to back health issues. I’m to stubborn to pay someone to do something I can do so that doesn’t help either. I’m still able to hit the track weekly in my mid 9 second bracket car but even that takes a day or two to recover from a long race weekend. Now with knee issues I looked into stem cell injections for faster recovery but that comes in at 7000.00 for one knee and both of mine bother me. Insurance won’t kick in anything towards it yet as it’s track record isn’t long enough yet. Fun fun fun.