210 miles above Earth, Expedition 15 crew member Sunita Williams attempted something no other astronaut has ever done. She ran the Boston Marathon while in orbit. Williams circled Earth at least twice, running as fast as eight mph but flying more than five miles each second, as she completed the Boston Marathon on a station treadmill. Her official completion time was 4:23:10 as she completed the race at 2:24 p.m. EDT Monday.
Williams ran under better weather conditions than her Boston counterparts. In Boston, it was 48 degrees with some rain, mist and wind gusts of 28 mph while station weather was 78 degrees with no wind or rain with 50% humidity.
Williams qualified for the marathon when she ran a 3:29:57 in the Houston Marathon last year. Her biggest challenge running in space will be staying harnessed to a specially designed treadmill with bungee cords. Williams says running on the TVIS which stands for Treadmill Vibration Isolation System can sometimes be uncomfortable. The machinery puts a strain on the runner's hips and shoulders. Link