Accession Number:

ADA209914

Title:

Effects of MOPP Configurations and Two Drinking Systems on Fluid Balance and Performance

Descriptive Note:

Final rept. Jul 1987-May 1989

Corporate Author:

ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA

Report Date:

1989-05-19

Pagination or Media Count:

6.0

Abstract:

The impact of wearing MOPP on fluid balance, thermoregulation and performance was evaluated. Fifteen male soldiers walked for 6 consecutive 5010 min. workrest cycles on two non-consecutive days and iodinated water 30 C was consumed ad-lib. On one day, soldiers wore the Battle Dress Uniform BDU and drank from canteens on the second day, they wore MOPP IV and drank with either the current gravity feed system CS or a fluid hydraulic FH system. All BDU subjects completed the entire 300 min of exercise, and average water intake 0. 25 Lhr partially compensated for sweat losses SR of 0.37 Lhr that contributed to body weight WT losses of 0.24 kghr. During work bouts, CS drank significantly less than FH 0.28 vs 0.42 Lhr, respectively. While SR was similar in both groups 0.84 Lhr and markedly increased relative to BDU, WT deficits were doubled those of BDU. Increased SR and inadequate rehydration produced increases in heart rate 49 bpm and heat storage 33 kcalm2 contributing to performance decrements in CS 210 min and FH 231 min. Both CS and FH perceived more symptoms of hyperthermia and dehydration, and rated their final walk significantly more difficult than their first. The results demonstrate that physiological and perceptual decrements can occur when MOPP IV level is worn during low intensity work in a warm climate, that a FH system may improve drinking during workexercise. Keywords MOPP 4 Heat tolerance Protective clothing Water consumption Stress physiology.

Subject Categories:

  • Stress Physiology
  • Protective Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE