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Manned Evaluation of the Second Generation International Space Station Treadmill during Parabolic Flight (EORS_T2DC9)
Principal Investigator
Research Area:
Exercise physiology
Species Studied
Scientific Name: Homo sapiens Species: Human

Astronauts currently use locomotive exercise as a countermeasure to the detrimental physiological effects that occur because of long-term exposure to microgravity (0-G). Currently, crewmembers perform locomotive exercise on the Treadmill with Vibration Isolation and Stabilization (TVIS). However, there is a second generation treadmill that is currently designed for use in the International Space Station (ISS). This new treadmill, T2, has features that are different than the TVIS, including a larger running area, the ability to operate in both forward and reverse directions, and the ability to operate at speeds up to 15 mph. It is unknown, however, how gait patterns and ground reaction forces differ between normal gravity (1-G) and 0-G on the new treadmill. The purpose of this investigation was to evaluate locomotion on the T2 in 1-G and 0-G.

The ISS is scheduled to have a six-person crew by the spring of 2009. All six crewmembers will be required to complete a daily exercise regimen that includes exercise on a treadmill. Operational considerations prevent the exclusive use of the existing TVIS to meet the requirement. Therefore, to accommodate the increased crew, a second treadmill has been proposed for the ISS.

Hypothesis: Locomotion on the T2 will have similar lower extremity joint kinematics as locomotion at similar speeds in 1-G.

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De Witt JK, Wiederhoeft C, Bentley J, Wilson C, English K, Stroud L, Loehr J, Everett M, Smoot D, Chesney D, Rullis S. (2008). Manned evaluation of the second-generation international space station treadmill during parabolic flight, C-9 and Other Microgravity Simulations: Summary Report, NASA/TM-2008-214765, 36-45.

Comparative study
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Data Information
Data Availability
Archive is complete. Data sets are not publicly available but can be requested.
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Contact time
Foot angle, maximum
Foot angle, minimum
Foot, ROM
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Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
ECP 02/01/2005 12/31/2010 In Progress

Additional Information
Managing NASA Center
Johnson Space Center (JSC)
Responsible NASA Representative
Johnson Space Center LSDA Office
Project Manager: Jessica Keune
Institutional Support
National Aeronautics and Space Administration (NASA)