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Treadmill with Vibration Isolation and Stabilization (TVIS) Harness Comfort Evaluation (EORS_TVIS)
Principal Investigator
Research Area:
Exercise physiology
Technology development
Species Studied
Scientific Name: Homo sapiens Species: Human

The Treadmill with Vibration Isolation and Stabilization (TVIS) Harness Comfort Study which was designed as a pilot study was conducted on the Exercise Countermeasures Laboratory's enhanced Zero-g Locomotion Simulator (eZLS) at NASA Glenn Research Center. This experiment falls under the Exercise Countermeasure Project (ECP) and part of the ECP mission is to develop requirements for new exercise equipment designs. This study sought to develop a standardized test protocol for evaluating comfort and effectiveness of two harness designs when loading subjects during simulated zero-gravity treadmill exercise.

The purpose of this pilot study was threefold; 1) to evaluate and compare the comfort of the current U.S. TVIS flight harness design with a prototype harness design (Cleveland Clinic) using the eZLS, 2) to provide recommendations for improvements to the harness/subject load device (SLD) system which increases comfort and effectiveness for both in-flight exercise systems and ground based zero-gravity exercise simulators, and 3) to identify measurements and data analysis results that correlate with comfort so that future harness/SLD designs can be evaluated with a standardized test protocol. This study was designed as a pilot study to establish a standardized test protocol for evaluating future harness designs. Statistical analyses were done on the data; however the study was not designed with the expectation of having adequate statistical power to make objective conclusions from the data (per NASA JSC Committee for the Protection of Human Subjects - approved protocol).

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Perusek G, De Witt J, Just M, Cavanagh P. Treadmill with vibration isolation and stabilization (TVIS) harness comfort evaluation. Final report. Cleveland OH. National Aeronautics and Space Administration, John H. Glenn Research Center; 2007 June.

Perusek G, Lewandowski B, Gilkey K, Nall M, Just M, Cavanagh P, et al. Exercise Countermeasures and a New Ground-Based Partial-g Analog for Exploration: Proceedings of the 45th American Institute of Aeronautics and Astronautics (AIAA) Aerospace Sciences Meeting and Exhibit, Reno, Nevada, 8-11 January 2007.

Human engineering
Body weight

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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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Active area of pressure sensor
Contact pressure, maximum
Contact pressure, mean
Contact time
External load
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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
Glenn Research Center (GRC)
Responsible NASA Representative
Johnson Space Center LSDA Office
Project Manager: Jessica Keune
Institutional Support
National Aeronautics and Space Administration (NASA)