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- Title
The effect of hyperhydration on physiological and perceived strain during treadmill exercise in personal protective equipment.
- Authors
Hostler, David; Gallagher Jr., Michael; Goss, Fredric L.; Seitz, Jennifer R.; Reis, Steven R.; Robertson, Robert J.; Northington, William E.; Suyama, Joe; Gallagher, Michael Jr; Reis, Steven E
- Abstract
Work in personal protective equipment (PPE) impairs thermoregulation causing cardiovascular stress, increased core body temperature, and hypohydration. We examined the effect of pretreating first responders performing treadmill exercise in PPE with an infusion of normal saline on physiological and perceptual strain. Ten (eight males, two females) euhydrated subjects performed treadmill exercise on two occasions wearing a chemical resistant coverall, air purifying respirator, butyl gloves, and heavy boots. During the hyperhydration session, normal saline was rapidly infused through an arm vein prior to donning PPE. Exercise duration and maximum core temperature did not differ between euhydrated and hyperhydrated conditions. Perceptual strain index (PeSI) was higher than physiological strain index (PhSI) in the euhydrated condition (P = 0.002) but neither index differed between the control and experimental conditions. Intravenous hyperhydration did not reduce physiological stress, increase exercise, or influence perceptual strain time when compared to the euhydrated condition in moderately fit individuals.
- Subjects
WATER intoxication; PHYSIOLOGIC salines; HUMAN physiology; PHYSIOLOGICAL stress; PHYSIOLOGIC strain; TREADMILL exercise; PROTECTIVE equipment (Sporting goods); PHYSIOLOGICAL effects of heat; BODY temperature; BODY temperature regulation; COMPARATIVE studies; EXERCISE; LONGITUDINAL method; PROTECTIVE clothing; RESEARCH methodology; MEDICAL cooperation; RESEARCH; SALT; TIME; EVALUATION research; PREVENTION
- Publication
European Journal of Applied Physiology, 2009, Vol 105, Issue 4, p607
- ISSN
1439-6319
- Publication type
journal article
- DOI
10.1007/s00421-008-0940-2