The feats of endurance people attempt for a sense of accomplishment are amazing.
Some people run marathons, others compete in triathlons, and still others climb mountains.
Athletes risk stress fractures, blisters, heat exhaustion and other pains to run races. It is part of the cost of competing and unlocking your body's potential. I'm currently reading a story of two men who are setting out to hike all 2,000 miles of the Appalachian Trail. To carry a fifty-pound pack 2,000 miles through mountains, snow and rain is almost unbelievable. Mountain climbing involves a whole other level of risk.