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                                        A/JSC MEDICAL SCIENCES 8L                       

 

 

 

 

               National Aeronautics and Space Administration

GRDUND~BASED 6t SMALL PAYLDADS RESEAACH~IN‑SPACE LHE SCUNS

 

Space Physiology and Countermeasures

 

 

 

THE MTERACTION OF THE SPACE SHU!ME LAUNCH AND ENTRY SCTIT

AND SUSTAINED WEIGHTLESSNESS ON EGRESS LOCOMOTION

 

 

 

Principal Investigator:           Michael C. Greenisen, Ph.D.

                             SD5lSp$ce Biomedical Research Institute

                             NASA lohnsan Space Center

                             Houston. TX M58

                             Telephone: 713‑483‑3574, FAX 713‑483‑622'7

 

 

 

CO‑Investigators."              Gideon B. Ariel, Ph.D.

                              Visiting Scientist

                              Universities Space Research Association

                              Houston, TX

                              714‑4B3‑3874

 

Suzanne M. Fortney, Ph.D.

SDSISpace Biomedical Research Institute

NASA Johnson Space Center

Houfm, Texas 77058

Telephone 713‑483‑7213, FAX 713483‑62,27

 

John D. Probe, M.fi.

Visiting Research Engineer

Universities Space Research Association

                                   fin. TX 77055

7143‑M74

Mark S. Sotiunann Ph.D.

Department of Human Kinetics

School of A11W Health Professes

University of Wisconsin

Milwaukee, WI 53201

414^229‑5676

 


          NASA.rJSC MEDICAL SCIENCES BL.                

 

 

 

 

Project Summary                                                         _

 

The ability of astronauts to egress the Shuttle, particularly during emergency conditions, is likely to be reduced following physiological adaptations in space. The escape locomotion phase of egress where trewmewbem will. be required to walk/run away from the vehicle wearing the cumbersome 35.418 (78 lbs.) space flight launch and entry suit (LES) is an untested area of Space Shuttle oblations.

 

The purpose of this study is to determine the consequences of extended periods of

weightlessness during space missions on astronauts' abilities and characteristics of locomotion while wearing the LES.

 

Thirty astronauts (both females and males) will be requested to participate in this study.

 

This study requires astronauts to walls with a velocity of 5.6 km/h (3.5 mph) for 5 minutes on a motorized treadmill in two phases:

 

1) preflight in the Exercise Physiology Laboratory at the Johnson Space Center, and

2) postflight onboard the Crew Transportation Vehicle (CTV) as it retrieves each

returning space flight crew after landing/wheel stop.

 

Phase 1) portly five days (L‑45y before flight astronauts will be testeed in three conditions: (a) unsuited, wearing workout attire and flight boots, (b) suited, wearing the complete LES ensemble with visor open breathing ambient air, and c) wearing tire LES with the visor down breathing from the SCBA (self contained breathing apparatus). Each astronaut will walls with a velocity of 5.6 km /h (3.5 mph) far 5 minutes, 466 meters (1531 ft) on a motorized treadmill. During the treadmill loaomadon, test two camera video recordings, oxygen consumption, and physiological measures will be accomplished. .

 

Phase 2) The treadmill will be placed in and secured to the floor of the CTV which picks up the astronauts aftm landing. C"!"V data will be limited to the LES suited condition, visor drown breathing from the SCRA, taken while the CTV remains modonless. Video, oxygen .uptake, and physiological data wilt be collected using methods comparable to those for preflight testing.

 


04‑19‑1994 15:35    713 4B36227           NASA/JSC MEDICAL SCIENCES BL  P.16

 

 

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                                                                   M. L'. creentteA, pt

 

.           2) Video Motion Data Analysis                                              _

 

 

The video tapes from each subject will be pied by an Ariel P"wfoxmance Analysis System. Using computer assistied screen displays, the videotape is digitized frame‑by‑frame to provide threediansl~nal movennent data. "!"his system uses mathematical equations to transform . input data do velocity of movements, center of gravity displacements, acceleration of body limbs, and forces (Abdel‑A47, Ka:ara,1971, Zernicke, 1976, and Shapiro, IM). These data may be printed out and are available for on sawn viewing. This video motion analysis technique will determine any deviation in gait during treadmill looomotion after larding compared to pmfight gait (Figures 8 and 9). Analysis of variance will be

 


 

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