Along a similar line, my dad skied 60 days the year he turned 60. His goal was to ski until he was 85...but he only made it to 81. Two years ago he passed on on his last run of the day and was found unconscious on the slope by the ski patrol. They airlifted him to Reno where he spent a week in the hospital with a concussion and 2 broken ribs. Recovery has taken a while but he's still active, walking and going to the gym every day and riding his bike around Stanford campus 2-3 times a week. No more skiing though.