Americans over 50 are crushing Iron Man and Iditarod races, marathons, more
A few days before running seven marathons in seven days on seven continents, Jill Jamieson warmed up by paragliding, climbing a mountain and swimming in the roughest seas she had ever experienced. Then came the races themselves, in which she battled subzero temperatures and 30 mph winds in Antarctica, suffered a stress fracture in Dubai,