NDLI: Load variation influences on joint work during squat exercise in reduced gravity

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Load variation influences on joint work during squat exercise in reduced gravity

Content Provider	NASA Technical Reports Server (NTRS)
Author	Guilliams, Mark E. DeWitt, John K. Logan, Rachel L. Fincke, Renita S. Ploutz-Snyder, Lori L.
Copyright Year	2011
Description	Resistance exercises that load the axial skeleton, such as the parallel squat, are incorporated as a critical component of a space exercise program designed to maximize the stimuli for bone remodeling and muscle loading. Astronauts on the International Space Station perform regular resistance exercise using the Advanced Resistive Exercise Device (ARED). Squat exercises on Earth entail moving a portion of the body weight plus the added bar load, whereas in microgravity the body weight is 0, so all load must be applied via the bar. Crewmembers exercising in microgravity currently add approx.70% of their body weight to the bar load as compensation for the absence of the body weight. This level of body weight replacement (BWR) was determined by crewmember feedback and personal experience without any quantitative data. The purpose of this evaluation was to utilize computational simulation to determine the appropriate level of BWR in microgravity necessary to replicate lower extremity joint work during squat exercise in normal gravity based on joint work. We hypothesized that joint work would be positively related to BWR load.
File Size	65841
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20110008225
Archival Resource Key	ark:/13960/t2896641z
Language	English
Publisher Date	2011-01-01
Access Restriction	Open
Subject Keyword	Aerospace Medicine Physical Exercise Musculoskeletal System Space Programs Gravitation Simulation Feedback Body Weight Muscles Astronauts Microgravity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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