How Often do Astronauts Exercise in Space?
Astronauts participating in space shuttle missions, which are usually two weeks long, exercise for approximately 30 minutes per day. Astronauts who live on the ISS for much longer periods of time are required to exercise for approximately two hours per day. Each astronaut’s exercise routine is monitored, and can be adjusted if necessary based on his or her monthly fitness assessment. If astronauts are scheduled to perform a spacewalk, their exercise routines may be altered or restricted.
