Citation

Kraemer WJ, Hooper DR, Kupchak BR, Saenz C, Brown LE, Vingren JL, Luk HY, DuPont WH, Szivak TK, Flanagan SD, Caldwell LK, Eklund D, Lee EC, Häkkinen K, Volek JS, Fleck SJ, Maresh CM. J. Appl. Physiol. (APS Bethesda) 2016; 121(2): 438-448.

Affiliation

Ohio State University.

Copyright

(Copyright © 2016, American Physiological Society)

DOI

10.1152/japplphysiol.00429.2016

PMID

27283914

Abstract

The purpose was to examine a round trip trans-American jet travel on performance, hormonal alterations, and recovery. Ten matched pairs of recreationally trained men were randomized to either a compression group (COMP) (n= 10, age: 23.1 ± 2.4 years, height: 174.8 ± 5.3cm, body mass: 84.96 ± 10.16 kg, body fat: 15.3 ± 6.0%) or control group (CONT) (n= 9, age: 23.2 ± 2.3 years, height: 177.5 ± 6.3cm, body mass: 84.35 ± 8.99 kg, body fat: 15.1 ± 6.4%). Subjects flew directly from Hartford, CT to Los Angeles, CA one day prior to a simulated sport competition (SSC) designed to create muscle damage and returned the next night on a overnight flight back home. Both groups demonstrated jet lag symptoms and associated decreases in sleep quality at all time points. Melatonin significantly (P < 0.05) increased over the first two days and then remained constant after the SSC. Epinephrine, testosterone, cortisol values significantly increased above resting values before and after the SSC with norepinephrine increases only after the SSC. Physical performances significantly decreased from control values on each day for the CONT group with COMP group exhaibiting no significant declines. Muscle damage markers were significantly elevated following the SSC with the COMP group having significantly lower values while maintaining neuromuscular performance measures that were not different from baseline testing. Trans-American jet travel significantly impacted parameters related to jet lag, sleep quality, hormonal responses, muscle tissue damage markers, and physical performance with an attenuation observed with extended wear compression garments.

Copyright © 2016, Journal of Applied Physiology.

Language: en