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Exercise Device Offers Constant, Selectable Resistance
August 17, 2011

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Innovators at NASA's Johnson Space Center (JSC) have patented a resistive exercise device that exerts uniform constant force over a range of motion. Composed of a frame and multiple mechanical and resistance elements (pulleys, springs, pistons, and elastic bands), the concept represents a unique approach to providing a constant but selectable resistive load for the maintenance and development of muscles. Beyond the original application for use aboard the International Space Station (to mimic the constant force exerted by gravity), the device could be used on Earth as resistive weight training equipment. Its advantage over conventional weight-lifting equipment is its portability and lightweight design. JSC has received patent number 6,958,032 for this technology.


  • Constant: Provides uniform force over the full range of motion
  • Selectable: Allows the user to choose the desired level of resistance
  • Portable: Features components that are smaller and lighter than conventional weightlifting equipment
  • Variable: Allows for incorporation of an electric motor to provide eccentric augmentation (making the load during inward movement greater than the load during outward movement)


  • Exercise equipment
  • Physical therapy equipment


Johnson Space Center has received patent protection (U.S. 6,958,032→) for this technology.

Licensing and Partnering Opportunity

This technology is being made available through JSC's Technology Transfer and Commercialization Office, which seeks to transfer technology into and out of NASA to benefit the space program and U.S. industry. NASA invites companies to consider licensing this technology for commercial applications.

Contact Information

If you would like more information about this technology or about NASA's technology transfer program, please contact:

Technology Transfer and Commercialization Office
NASA's Johnson Space Center
Phone: 281-483-3809
E-mail: jsc-techtran@mail.nasa.gov

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Page Last Updated: January 16th, 2014
Page Editor: NASA Administrator