Accession Number : AD0486703

Title :   DEHYDRATION AND MUSCULAR WORK.

Descriptive Note : Technical rept. 8 Dec 64-28 Apr 65,

Corporate Author : EDGEWOOD ARSENAL MD

Personal Author(s) : Craig ,F. N.

Report Date : AUG 1966

Pagination or Media Count : 31

Abstract : In order to evaluate the benefit to be derived from the use of the E47 field protective mask drinking device, endurance in exhausting work in grade walking in a warm environment (46 C dry bulb, 23 C wet bulb) was measured before and after 6 hr of sweating. In nine men, the average dehydration was 4.3% of the body weight on the first day with restricted water intake, and 1.9% on a second day with unrestricted water intake by means of the drinking device. Endurance was reduced by 48% on the first day and by 22% on the second day. One canteen full of water would provide only a marginal benefit. Under these conditions, an intake of four canteens would be required to maintain optimal endurance. Exposure to heat and dehydration was accompanied by a hyperventilation that in four of the men exceeded 21 1/min. (Author)

Descriptors :   (*DEHYDRATION, EXERCISE(PHYSIOLOGY)), (*STRESS(PHYSIOLOGY), DEHYDRATION), PROTECTIVE MASKS, WATER, INGESTION(PHYSIOLOGY), BODY WEIGHT, RESPIRATION, PULSE RATE, OXYGEN CONSUMPTION, PERSPIRATION, HEAT, EXPOSURE(PHYSIOLOGY), BODY TEMPERATURE, TIME, STRESS(PHYSIOLOGY)

Subject Categories : Stress Physiology
      Protective Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE