NASA astronaut Sunita Williams completed a triathlon from space Sept. 16, 2012, using an orbital treadmill to complete the running portion, a stationary bicycle for the biking leg, and a resistance ... more 

NASA astronaut Sunita Williams completed a triathlon from space Sept. 16, 2012, using an orbital treadmill to complete the running portion, a stationary bicycle for the biking leg, and a resistance machine to simulate swimming. less