Accession Number : ADA119129


Title :   Effects of Gender, Load, and Backpack on Easy Standing and Vertical Jump Performance. Volume 2


Descriptive Note : Final rept. 1 Oct 1979-31 Aug 1981


Corporate Author : PENNSYLVANIA STATE UNIV STATE COLLEGE BIOMECHANICS LAB


Personal Author(s) : Nelson, Richard C ; Martin, Philip E


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA119129


Report Date : Mar 1982


Pagination or Media Count : 77


Abstract : This study was conducted to determine the effects of loads worn or carried and the type of backpack used on parameters of the easy standing and vertical jumping performance of men and women. Analyses of the easy standing data indicated that both men and women demonstrated greater stability with the medium than with the lighter or heavier loads. The internal frame backpack resulted in greater postural stability relative to the three, external-frame systems. Increasing loads produced a systematic, linear decrease in vertical jumping performance. Analyses of the effects of backpacks on the parameters of jumping performance revealed few differences among the packs. However, it was found that height of jump was somewhat better with the internal frame system than with the external-frame backpacks. Additional analyses were carried out on the trial-to-trial reliability of easy standing and on ground reaction force parameters of vertical jumping adjusted for body weight and system weight.


Descriptors :   *BACKPACKS , ANTHROPOMETRY , ARMY PERSONNEL , FEMALES , LOADS(FORCES) , MALES , PERFORMANCE TESTS , TEST AND EVALUATION , VARIABLES


Subject Categories : Human Factors Engineering & Man Machine System
      Protective Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE