Research and development of an Advanced Personal Load Carriage Measurement System. Phase IV: Section G: Analysis of human responses to load location in a back pack


  1. Johnson, R.C.
  2. Pelot, R.P.
  3. Doan, J.E.
  4. Stevenson, J.M.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Queen's Univ, Kingston ONT (CAN) Ergonomics Research Group
The purpose of this study was to determine the effect of varying the centre of gravity of the load on physiological, biomechanical, and subjective factors of experienced soldiers. A secondary purpose was to examine the relationship of these factors to a standardized Load Carriage (LC) simulator test. Twenty-two experienced soldiers marched on treadmill at 5.6 km/hr for 15 minutes carrying a modified backpack, created by US Army Natick Research Laboratory, which consisted of the ALICE pack frame and a movable load box containing 36 kg. In addition, a load carriage vest was used to examine a balanced load distribution. Physiological measures were collected using oxygen consumption (VO2) and heart rate. Biomechanical measures were collected from video images of gait to calculate trunk and body lean. Subjective measures were recorded of pressure points using a body scan image, as well as general assessments of each system and an overall ranking. Physiological measures were not able to discern statistical and an overall ranking. Physiological measures were not able to discern statistical differences between load locations, perhaps because of the short test duration. Biomechanical measures revealed that trunk and body lean were significantly reduced with the balanced method, followed by the higher centre of gravity load location. TRUNCATED
Advanced Personal Load Carriage System (APLCS);Ergonomics;Integrated Protective Clothing and Equipment (IPCE);Load carriage;Rucksacks;Biomechanical models;Load optimization;Back (anatomy);Spine (anatomy);Lumbar area;Iliac crest
Report Number
DCIEM-CR-2000-096 — Contract Report
Date of publication
01 Oct 1998
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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