Weightless Workouts

A new fitness machine on the space station brings astronaut exercise into the 21st century

Skylab Bike


The Skylab space station of the 1970s had a bicycle ergometer on board. Pete Conrad (shown here after a workout session on the ground in preparation for his 1973 Skylab 2 mission) reported after his flight that even though the bike didn't exercise every muscle (working the calf muscles was especially hard), "It does make you feel good if you can work out twice a day." His Skylab 2 crewmate Joe Kerwin added, "Even just running around [Skylab's] ring lockers or throwing the ball around in the evening for 15 minutes makes you more relaxed."

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