I'm 52 and run 10-12 miles/week and try to do a few pushups/pullups/sling some dumbbells a couple times a week. I'm no powerlifter or marathon runner, but I try to stay reasonably fit. And yes I'm pretty worn out after most matches. I almost always build a stage the morning of the match and I always paste or RO or score, but there is still some standing around in between. I can walk to Little Rock, but standing wears out my feet. Old injuries don't help, either.