As we were running on Sunday, there was a guy on a stairmaster w/ a hiking pack and hiking shoes on, just trekin' away. We had a chance to talk to him after our workout as we stretched. He was in his late 60's. Sometime ago, after watching the majority of his family die between the ages of 45-55, he decided that he will not be added to the list. At age 55, he exercised for the first time in his life. 10 or so years later, he has climbed Mt. Denali (McKinley), The Grand Tetons, Kilimanjaro, and most impressive of all: Everest. 3 times. (not sumit, but as high as possible w/o oxygen - still at 21,500 ft). He didn't look much older than 60, but we asumed he was in his late 60s because of all he has completed.