Exercising in Space!

Wondering how much to exercise? If you’re an astronaut, you may need as much as four hours of exercise in a 16-hour period!!
Whereas gravity does a pretty good job of keeping our bodies fit on earth, in space, you need much more just to maintain bone mass! So next time you’re finished with your 30 minutes of cardio, give a wave up to the ISS! They still have 3 and half hours to go!