Evidence of disturbed sleep and increased illness in overreached endurance athletes

Hausswirth, C; Louis, J; Aubry, A; Bonnet, G; Duffield, R; Le Meur, Y

Evidence of disturbed sleep and increased illness in overreached endurance athletes

Hausswirth, C Louis, J Aubry, A Bonnet, G Duffield, R

Le Meur, Y

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Publication Type:: Journal Article
Citation:: Medicine and Science in Sports and Exercise, 2014, 46 (5), pp. 1036 - 1045
Issue Date:: 2014-01-01

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Field	Value	Language
dc.contributor.author	Hausswirth, C	en_US
dc.contributor.author	Louis, J	en_US
dc.contributor.author	Aubry, A	en_US
dc.contributor.author	Bonnet, G	en_US
dc.contributor.author	Duffield, R https://orcid.org/0000-0002-5641-1314	en_US
dc.contributor.author	Le Meur, Y	en_US
dc.date.issued	2014-01-01	en_US
dc.identifier.citation	Medicine and Science in Sports and Exercise, 2014, 46 (5), pp. 1036 - 1045	en_US
dc.identifier.issn	0195-9131	en_US
dc.identifier.uri	http://hdl.handle.net/10453/34282
dc.description.abstract	PURPOSE: This study aimed to examine whether (i) objective markers of sleep quantity and quality are altered in endurance athletes experiencing overreaching in response to an overload training program and (ii) potential reduced sleep quality would be accompanied with a higher prevalence of upper respiratory tract infections in this population. METHODS: Twenty-seven trained male triathletes were randomly assigned to either overload (n = 18) or normal (CTL, n = 9) training groups. Respective training programs included a 1-wk moderate training phase followed by a 3-wk period of overload or normal training, respectively, and then a subsequent 2-wk taper. Maximal aerobic power and oxygen uptake (V̇O 2max) from incremental cycle ergometry were measured after each phase, whereas mood states and incidences of illness were determined from questionnaires. Sleep was monitored every night of the 6 wk using wristwatch actigraphy. RESULTS: Of the 18 overload training group subjects, 9 were diagnosed as functionally overreached (F-OR) after the overload period, as based on declines in performance and V̇O2max with concomitant high perceived fatigue (P < 0.05), whereas the other 9 overload subjects showed no decline in performance (AF, P > 0.05). There was a significant time-group interaction for sleep duration (SD), sleep efficiency (SE), and immobile time (IT). Only the F-OR group demonstrated a decrease in these three parameters (-7.9% ± 6.7%,-1.6% ± 0.7%, and-7.6% ± 6.6% for SD, SE, and IT, respectively, P < 0.05), which was reversed during the subsequent taper phase. Higher prevalence of upper respiratory tract infections were also reported in F-OR (67%, 22%, and 11% incidence rate for F-OR, AF, and CTL, respectively). CONCLUSION: This study confirms sleep disturbances and increased illness in endurance athletes who present with symptoms of F-OR during periods of high volume training. © 2014 by the American college of Sports Medicine.	en_US
dc.relation.ispartof	Medicine and Science in Sports and Exercise	en_US
dc.relation.isbasedon	10.1249/MSS.0000000000000177	en_US
dc.subject.classification	Sport Sciences	en_US
dc.subject.mesh	Humans	en_US
dc.subject.mesh	Respiratory Tract Infections	en_US
dc.subject.mesh	Sleep Disorders	en_US
dc.subject.mesh	Fatigue	en_US
dc.subject.mesh	Exercise Test	en_US
dc.subject.mesh	Prevalence	en_US
dc.subject.mesh	Affect	en_US
dc.subject.mesh	Perception	en_US
dc.subject.mesh	Physical Endurance	en_US
dc.subject.mesh	Running	en_US
dc.subject.mesh	Swimming	en_US
dc.subject.mesh	Physical Education and Training	en_US
dc.subject.mesh	Bicycling	en_US
dc.subject.mesh	Male	en_US
dc.subject.mesh	Athletic Performance	en_US
dc.subject.mesh	Actigraphy	en_US
dc.subject.mesh	Sleep Wake Disorders	en_US
dc.title	Evidence of disturbed sleep and increased illness in overreached endurance athletes	en_US
dc.type	Journal Article
utslib.citation.volume	5	en_US
utslib.citation.volume	46	en_US
utslib.for	110602 Exercise Physiology	en_US
utslib.for	1106 Human Movement and Sports Sciences	en_US
utslib.for	1116 Medical Physiology	en_US
utslib.for	1117 Public Health and Health Services	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Health
pubs.organisational-group	/University of Technology Sydney/Faculty of Health/Sports and Exercise Science
pubs.organisational-group	/University of Technology Sydney/Strength - CHSP - Health Services and Practice
utslib.copyright.status	open_access
pubs.issue	5	en_US
pubs.publication-status	Published	en_US
pubs.volume	46	en_US

Abstract:

PURPOSE: This study aimed to examine whether (i) objective markers of sleep quantity and quality are altered in endurance athletes experiencing overreaching in response to an overload training program and (ii) potential reduced sleep quality would be accompanied with a higher prevalence of upper respiratory tract infections in this population. METHODS: Twenty-seven trained male triathletes were randomly assigned to either overload (n = 18) or normal (CTL, n = 9) training groups. Respective training programs included a 1-wk moderate training phase followed by a 3-wk period of overload or normal training, respectively, and then a subsequent 2-wk taper. Maximal aerobic power and oxygen uptake (V̇O 2max) from incremental cycle ergometry were measured after each phase, whereas mood states and incidences of illness were determined from questionnaires. Sleep was monitored every night of the 6 wk using wristwatch actigraphy. RESULTS: Of the 18 overload training group subjects, 9 were diagnosed as functionally overreached (F-OR) after the overload period, as based on declines in performance and V̇O2max with concomitant high perceived fatigue (P < 0.05), whereas the other 9 overload subjects showed no decline in performance (AF, P > 0.05). There was a significant time-group interaction for sleep duration (SD), sleep efficiency (SE), and immobile time (IT). Only the F-OR group demonstrated a decrease in these three parameters (-7.9% ± 6.7%,-1.6% ± 0.7%, and-7.6% ± 6.6% for SD, SE, and IT, respectively, P < 0.05), which was reversed during the subsequent taper phase. Higher prevalence of upper respiratory tract infections were also reported in F-OR (67%, 22%, and 11% incidence rate for F-OR, AF, and CTL, respectively). CONCLUSION: This study confirms sleep disturbances and increased illness in endurance athletes who present with symptoms of F-OR during periods of high volume training. © 2014 by the American college of Sports Medicine.

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http://hdl.handle.net/10453/34282