Influence of U.S. Army Headgear Parameters on Neck Muscle Loading and Fatigue.
Annual rept. 1 Jun 81-15 Dec 82,
WRIGHT STATE UNIV DAYTON OH
Pagination or Media Count:
This study evaluated the endurance times for the lateral and posterior neck muscles when statically and dynamically loaded by 15 headgear configurations 5 different helmet centers-of-gravity and 3 different helmet weights. Systematic variations of these headgear loading configurations was accomplished via a variable C.G.-weight helmet simulator. Various cardiovascular responses, quantitative electromyographic measurements, and recovery responses were also evaluated. Subjects were tested in an isometric head dynamometer. Results indicate that for the forward-low C.G., the endurance times with 5.0 lb. and 9.0 lb. helmet weights were significantly reduced. p or .05. A pronounced increase in blood pressure, heart rate and rectified E.M.G. amplitude was found for isometric contractions of the neck muscles. The implications of these results to U.S. Army aviator helmet design and helmet-borne avionic devices are discussed. Keywords Strength-recovery response.
- Anatomy and Physiology
- Stress Physiology
- Protective Equipment