My wife always reminds me to not go out and kill myself trying to get a Personal Best (PB) when going out for a ride. I always laugh and do it anyway. But this week I thought about it and decided to pass going up a 8% four mile hill with this in mind.

At our age do you guys think about when to stop pushing yourself and knowing when to back off? We grew up being competitive and always challenge ourselves but then again I don't want to have a heart attack doing what we love. Anyone else knows where their limit is and try not to go pass it in fear of what could happen?