Abstract
Purpose
:

To assess the efficacy of a combined light exposure and sleep hygiene intervention to improve team-sport performance following eastward long-haul transmeridian travel.

Methods
:

Twenty physically trained males underwent testing at 09:00 and 17:00 hours local time on 4 consecutive days at home (baseline) and the first 4 days following 21 hours of air travel east across 8 time zones. In a randomized, matched-pairs design, participants traveled with (INT; n = 10) or without (CON; n = 10) a light exposure and sleep hygiene intervention. Performance was assessed via countermovement jump, 20-m sprint,
T
test, and Yo-Yo Intermittent Recovery Level 1 tests, together with perceptual measures of jet lag, fatigue, mood, and motivation. Sleep was measured using wrist activity monitors in conjunction with self-report diaries.

Results
:

Magnitude-based inference and standardized effect-size analysis indicated there was a very likely improvement in the mean change in countermovement jump peak power (effect size 1.10, ±0.55), and likely improvement in 5-m (0.54, ±0.67) and 20-m (0.74, ±0.71) sprint time in INT compared with CON across the 4 days posttravel. Sleep duration was most likely greater in INT both during travel (1.61, ±0.82) and across the 4 nights following travel (1.28, ±0.58) compared with CON. Finally, perceived mood and motivation were likely worse (0.73, ±0.88 and 0.63, ±0.87) across the 4 days posttravel in CON compared with INT.

Conclusions
:

Combined light exposure and sleep hygiene improved speed and power but not intermittent-sprint performance up to 96 hours following long-haul transmeridian travel. The reduction of sleep disruption during and following travel is a likely contributor to improved performance.
Topics

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Semenick D. Testing protocols and procedures. In: Baechle TR, Earle RW, eds, Essentials of Strength Training and Conditioning. Champaign, IL: Human Kinetics; 1994:258–273.
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Galambos SA, Terry PC, Moyle GM, Locke SA, Lane AM. Psychological predictors of injury among elite athletes. Br J Sports Med. 2010: 39:351–354.
[46]
Roach GD, Sargent C. Interventions to minimise jet lag after westward and eastward flight. Front Physiol. 2019;10:927. PubMed ID: 31417411 doi:10.3389/fphys.2019.0092710.3389/fphys.2019.00927 10.3389/fphys.2019.00927
[47]
Czeisler CA, Kronauer RE, Allan JS, et al. Bright light induction of strong (type 0) resetting of the human circadian pacemaker. Science. 1989;244(4910):1328–1333. PubMed ID: 2734611 doi:10.1126/science.273461110.1126/science.2734611 10.1126/science.2734611
[48]
Eastman CI, Burgess HJ. How to travel the world without jet lag. Sleep Med Clin. 2009;4(2):241–255. PubMed ID: 20204161 doi:10.1016/j.jsmc.2009.02.0062020416110.1016/j.jsmc.2009.02.006 10.1016/j.jsmc.2009.02.006
[49]
Vandenbogaerde TJ, Hopkins WG. Monitoring acute effects on athletic performance with mixed linear modeling. Med Sci Sports Exerc. 2010;42(7):1339–1344. PubMed ID: 20068494 doi:10.1249/MSS.0b013e3181cf7f3f10.1249/MSS.0b013e3181cf7f3f20068494 10.1249/mss.0b013e3181cf7f3f
[50]
Progressive Statistics for Studies in Sports Medicine and Exercise Science

WILLIAM G. HOPKINS, Stephen W. Marshall, Alan M. Batterham et al.

Medicine & Science in Sports & Exercise 2009 10.1249/mss.0b013e31818cb278

Showing 50 of 58 references

Metrics
9
Citations
58
References
Details
Published
Apr 01, 2021
Vol/Issue
16(4)
Pages
517-526
Cite This Article
Peter M. Fowler, Wade Knez, Heidi R. Thornton, et al. (2021). Sleep Hygiene and Light Exposure Can Improve Performance Following Long-Haul Air Travel. International Journal of Sports Physiology and Performance, 16(4), 517-526. https://doi.org/10.1123/ijspp.2019-0931
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