International Space Station

As free weights are ineffective in the microgravity environment of space, the International Space Station needed another way for crewmembers to maintain muscle strength while in orbit. The answer was SpiraFlex® resistance technology.

Astronauts can expect to suffer a 1- to 2-percent loss in bone mass per month while in space. The diminished gravity also means that their muscles are not required to work as hard, greatly increasing the risk of muscle degeneration, or atrophy.

SpiraFlex® technology helps combat this deterioration by duplicating the benefits of free weights in a lightweight, safe, easy-to-use system. The smooth, consistent resistance allows the astronauts to build and maintain lean, strong muscle while in orbit and return to earth healthy.

                                 The same technology is now   available on earth

The versatile, compact Bowflex Revolution® home gym offers you the same benefits of consistent resistance that the astronauts enjoy. Even the toughest exercises feel smooth without the inertia commonly associated with free weights. Find out how easy it is to build lean, strong muscle fast.