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Exercise Countermeasures Lab

The Challenge

Exposure to microgravity induces physiological changes in astronauts, including bone loss, muscle atrophy, and reductions in aerobic and sensorimotor capacity that may affect the crewmember’s ability to perform mission tasks. Exercise in space is used as a ‘countermeasure’ to combat this physiological deconditioning, keep crewmembers healthy, and mitigate associated risks.

The Research

Advanced exercise countermeasures hardware, crew equipment, and exercise routines are being developed to address these challenges, which will meet medical, vehicle, and habitat requirements, and provide optimal and effective workouts in space.

The Progress

The Exercise Countermeasures Laboratory (ECL) at NASA Glenn Research Center (Cleveland, OH) is a ground-based test bed which provides high-fidelity weightlessness, lunar (1/6g) and Martian (1/3g) human-in-the-loop exercise simulations for developing exercise countermeasure devices, equipment, and exercise protocols for spaceflight.  The ECL also provides a testbed to quantify the physiological demands of performing exercise in shirt-sleeve environment. The enhanced Zero-g Locomotion Simulator (eZLS) exercise platform orients human test subjects horizontally, such that they exercise in simulated zero-g (oriented 90 degrees relative to the gravity vector) against a three degree-of-freedom air-bearing exercise simulator which allows frictionless translation and rotation. The test subjects are suspended in this supine orientation from a motorized system of bungees for weightlessness locomotion or exercise simulation, or at the appropriate pitch angle for whole-body partial gravity simulations. The T2 Treadmill on the International Space Station (ISS) tested their vibration isolation system in the eZLS and verified its operation prior to flight. The Glenn Harness, an improved treadmill harness worn by crewmembers while exercising on the T2 Treadmill on the ISS, was tested at the ECL. This ground-based testbed is invaluable for testing concepts and proving out new designs before they fly.


ECL – Exercise Countermeasures Laboratory
eZLS – Enhanced Zero-G Locomotion Simulator
ISS – International Space Station

Technical Data


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