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Influence of Hydration on Sleep, Nocturnal Heart Rate Variability, and Cognition

Wilkinson, Matthew
http://orcid.org/0000-0002-0070-6586
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1490124037944407

Abstract Details

2017, Master of Science (MS), Ohio University, Experimental Psychology (Arts and Sciences).
Good sleep hygiene promotes better sleep duration and quality, which in turn benefits health and daytime function. However, because past studies have used global measures of sleep hygiene it is difficult to adequately evaluate observed relationships. To overcome this limitation, the investigation of specific sleep promotion practices on sleep quality are necessary. This study examined relationships between experimentally-manipulated pre-sleep hydration status, sleep quality (subjective reports, sleep efficiency, and high-frequency heart rate variability), and cognition. Thirty-two undergraduate students (50% female; 81.3% white) underwent normal fluid intake and experimental evening-time fluid restriction and enhancement protocols in a randomly-assigned order. Participants in their domiciles stopped all fluid intake during restriction and drank an additional two liters to their normal intake during enhancement. Throughout each approximate 16-hour field observation, heart and physical activity were recorded. Upon returning to the laboratory, previous night subjective sleep quality and current hydration status were recorded. Tests of working memory and reaction time were then administered following restriction and enhancement. As compared to normal intake, fluid restriction reduced subjective sleep quality. Compared to fluid enhancement, fluid restriction resulted in reduced sleep time heart rate variability after adjusting for wake time values. Only modest improvement for enhancement on a test of working memory was observed with fluid enhancement. Overall, fluid restriction may worsen sleep quality, but only slightly affect subsequent daytime cognition.
Peggy Zoccola (Committee Co-Chair)
Christopher France (Committee Co-Chair)
Bruce Carlson (Committee Member)
40 p.
Psychobiology; Psychology
sleep quality; heart rate variability; hydration; cognition; working memory; reaction time

Recommended Citations

Citations

  • Wilkinson, M. (2017). Influence of Hydration on Sleep, Nocturnal Heart Rate Variability, and Cognition [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1490124037944407

    APA Style (7th edition)

  • Wilkinson, Matthew. Influence of Hydration on Sleep, Nocturnal Heart Rate Variability, and Cognition. 2017. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1490124037944407.

    MLA Style (8th edition)

  • Wilkinson, Matthew. "Influence of Hydration on Sleep, Nocturnal Heart Rate Variability, and Cognition." Master's thesis, Ohio University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1490124037944407

    Chicago Manual of Style (17th edition)

ohiou1490124037944407
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© 2017, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.