I'm 48 and mentally feel 20, physically I can do what I did at 17 (17 was not great,peak years were 28-38) Wish I started making field notes when I started bow hunting deer in 75. Take care of yourself, eat well (not too much), take glucosomine/condroitan, stay fit and things are still good. Spent 20 years in the army, 6 jumping from airlplanes some wear but obstacles are all in your mind and most things can be fixed with weight training. Real PITA is 3 teenage daughters and a job that gets more demanding every year. Getting out and enjoying the hunt is the key. I see active hunters getting out every day in their mid 80s, and others who leave us too soon and for no good reason. My best friend is 61 and a retired special forces COL. He let his hammer toe and knees go for years and now is a wreck- but still out gutting it out, we joke about just cutting both legs off at the knee and getting one of them new fangled fake ones! Advice: get things fixed when they need it. Every older person who gets a new knee says they should have done it earlier...I am putting it off (don't anything yet)
Any hoo keep at it, can hardly wait til I am old enough to hunt everyday!!!!