For example, one of the great endurance athletes of all time, former Olympic marathon champion Joan Benoit Samuelson, broke the U.S. women’s indoor 3,000-meter record for runners 50 and older on Friday according to the AP. Running in her first competitive track meet in six years, the 51-year-old clocked 10 minutes, 22.69 seconds on Friday at the USA Masters Indoor Track & Field Championships. Benoit Samuelson said she didn’t prepare much for the race and might run more competitive events. The resident of Freeport, Maine, won the inaugural Olympic women’s marathon at the 1984 Los Angeles Games.