FYI, NASA's Space Gyms Are The Weirdest Thing Ever
 

For astronauts in space, exercise is not a choice. In order to prevent the loss of muscle mass and bone density due to a lack of gravity, working out is a necessity. NASA even mandates that astronauts aboard the International Space Station exercise two hours per day.

But how exactly do astronauts work up a sweat in microgravity? For starters, the equipment they use barely resembles what you'll find at the neighborhood gym.

Below, take a look at five bizarre contraptions that help keep astronauts in tip-top shape. Your treadmill has never looked so mundane. 


 

Also on HuffPost:

-- This feed and its contents are the property of The Huffington Post, and use is subject to our terms. It may be used for personal consumption, but may not be distributed on a website.












More...