Energy Cost and Post-Exercise Effects on a Prolonged, High Rate of Fire, Howitzer Simulator Training Exercise
ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
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The energy cost and continued effectiveness of 155 mm Howitzer crewmen during a 45 hour exercise with high rates of fire 640 roundsday were examined. Energy cost was estimated from heart rate. Additional measures included profile of mood states POMS, rating of perceived exertion RPE, rating of pain, soreness and discomfort, arm-hand steadiness, handgrip strength and time to mission completion. Energy cost and time to mission completion decreased significantly over the 45 hours, as did handgrip strength. POMS revealed an increase in fatigue and tension and a decrease in vigor. RPE increased significantly, as did upper body pain soreness and discomfort. Arm- hand steadiness was not affected. Overall results indicated that high rates of fire could be maintained for a 45 hour period with little effect on objective measurements, and with a significant decrease in time for task completion and energy cost. RPE, POMS and perception of pain, soreness and discomfort were all negatively affected by continuous operations, as was handgrip strength. While howitzer loading performance was not affected, these factors may become more important in longer training exercises. Howitzer crew performance, energy cost, lifting exercise, RPE, POMS, pain, soreness and discomfort, arm-hand steadiness, body composition, aerobic capacity, muscle strength, APFT.
- Humanities and History
- Stress Physiology
- Fire Control and Bombing Systems