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J Appl Physiol 70: 756-763, 1991;
8750-7587/91 $5.00
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Journal of Applied Physiology, Vol 70, Issue 2 756-763, Copyright © 1991 by American Physiological Society

ARTICLES

Air travel across four time zones in college swimmers

P. J. O'Connor, W. P. Morgan, K. F. Koltyn, J. S. Raglin, J. G. Turner and N. H. Kalin
Exercise and Sport Research Institute, Arizona State University, Tempe 85287-0404.

Eighteen female and 22 male college swimmers were flown across four time zones in east-to-west (E-W) and west-to-east (W-E) directions. A pre- and postflight paced swim of 182.9 m at an intensity equal to 90% of the swimmers' maximal velocity was completed, and salivary cortisol, heart rate (HR), and rated perceived exertion were measured. Blood pressure, HR, muscle soreness, and mood were also assessed at rest on the day before and on the day after travel. Because training volumes for both females and males were greater (P less than 0.001) in the week before W-E than E-W travel, the W-E and E-W data were analyzed separately. Two-way repeated-measures analyses of variance revealed that pre- and postexercise cortisol decreased after E-W travel and increased after W-E travel in comparison to preflight values. Resting and exercise HR responses to air travel were small in magnitude, and their significance depended on the direction of travel. Effort sense was not altered by air travel, but significant (P less than 0.001) improvements in mood and reductions in muscle soreness were observed after E-W and W-E travel for both genders. It was concluded that 1) female and male college swimmers have similar responses to air travel and 2) air travel across four time zones during heavy swim training does not have negative physiological, perceptual, or affective consequences.


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