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      Melatonin and sleep responses following exercise in elite female athletes

      O'Donnell, Shannon Lea; Beaven, Christopher Martyn; Jacobson, Gregory M.; Bird, Steve; Driller, Matthew W.
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      O’Donnell, S. L., Beaven, C. M., Jacobson, G. M., Bird, S., & Driller, M. W. (2019). Melatonin and sleep responses following exercise in elite female athletes. New Zealand Journal of Sport and Exercise Science, 2(1), 23–33.
      Permanent Research Commons link: https://hdl.handle.net/10289/13050
      Abstract
      Objective: To determine the melatonin concentrations and subsequent sleep indices of elite netball athletes following a training day when compared to a control day. Methods: Ten elite female netball athletes (mean ± SD; age = 23 ± 6 yrs) provided saliva samples PRE (17:15h) and POST (22:00h) a training session, and a day with no training (CONTROL). Sleep monitoring was performed using wrist actigraphy to assess total time in bed (TTB), total sleep time (TST), sleep efficiency (SE) and sleep latency (SL). Results: Melatonin levels were significantly lower (p < 0.05), both PRE and POST the training condition (6.2 and 17.6 pg/mL, respectively) when compared to the CONTROL (14.8 and 24.3 pg/mL, respectively). There were no significant differences observed between conditions for any of the sleep variables. However, a small reduction in TST could be observed following the training session condition compared to the CONTROL condition. Conclusion: The scheduling of netball training in the evening is shown to suppress salivary melatonin levels. This may have an influence on subsequent sleep following night-time exercise.
      Date
      2019
      Type
      Journal Article
      Rights
      This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International license (CC BY-NC-ND 4.0). You are free to share, copy and redistribute the material in any medium or format under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Non-commercial — You may not use the material for commercial purposes. No Derivatives — If you remix, transform, or build upon the material, you may not distribute the modified material. No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
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