ACCEPTED VERSION Killer et al 2015 JSS IT & Sleep.pdf (536.49 kB)
Download fileEvidence of disturbed sleep and mood state in well-trained athletes during short-term intensified training with and without a high carbohydrate nutritional intervention
journal contribution
posted on 2016-04-15, 13:06 authored by Sophie C. Killer, Ida S. Svendsen, A.E. Jeukendrup, Michael GleesonFew studies have investigated the effects of exercise training on sleep physiology in well-trained athletes. We investigated changes in sleep markers, mood state and exercise performance in well-trained cyclists undergoing short-term intensified training and carbohydrate nutritional intervention. Thirteen highly-trained male cyclists (age: 25 ± 6y, (Formula presented.)O2max: 72 ± 5 ml/kg/min) participated in two 9-day periods of intensified training while undergoing a high (HCHO) or moderate (CON) carbohydrate nutritional intervention before, during and after training sessions. Sleep was measured each night via wristwatch actigraphy. Mood state questionnaires were completed daily. Performance was assessed with maximal oxygen uptake ((Formula presented.). Percentage sleep time fell during intensified training (87.9 ± 1.5 to 82.5 ± 2.3%; p < 0.05) despite an increase in time in bed (456 ± 50 to 509 ± 48 min; p = 0.02). Sleep efficiency decreased during intensified training (83.1 ± 5.3 to 77.8 ± 8.6%; p < 0.05). Actual sleep time was significantly higher in CON than HCHO throughout intensified training. Mood disturbance increased during intensified training and was higher in CON than HCHO (p < 0.05). Performance in the (Formula presented.) exercise protocol fell significantly with intensified training. The main findings of this study were that 9-days of intensified training in highly-trained cyclists resulted in significant and progressive declines in sleep quality, mood state and maximal exercise performance.
Funding
This work was supported by the Pepsico Inc. [Gatorade Sports Science Institute].
History
School
- Sport, Exercise and Health Sciences
Published in
Journal of Sports SciencesCitation
KILLER, S.C. ... et al, 2015. Evidence of disturbed sleep and mood state in well-trained athletes during short-term intensified training with and without a high carbohydrate nutritional intervention. Journal of Sports Sciences, 35 (14), pp. 1402-1410.Publisher
© Taylor and FrancisVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2015Notes
This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Sports Sciences on 25th September 2015, available online: http://www.tandfonline.com/10.1080/02640414.2015.1085589.ISSN
0264-0414eISSN
1466-447XPublisher version
Language
- en