An investigation into sleep patterns and the effect of time of day on performance in youth swimmers

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Abstract

The purpose of this study was to investigate sleep patterns in competitive youth swimmers and to establish any time-of-day effect on physiological and psychological variables linked to swimming performance. Twelve swimmers (14.8 ± 2.1 years) underwent physiological and psychological tests in morning and evening and completed sleep diaries over a 2-week period. There was a non-significant effect between morning and evening swimming performance for 800 m (p = 0.068) and 50 m (p = 0.306). Handgrip strength was significantly greater in evening (p = 0.007), back and leg strength were significantly greater in morning (p = 0.013). There was no time-of-day effect for jump height (p = 0.756). The profile of mood states indicated significantly higher anger (p = 0.012) and vigour (p = 0.000) in the morning. Swimming performance was not significantly affected by time of day; however, physiological variables showed varied results. Multiple factors could be influencing results including training time and mood state so should be monitored closely by coaches.
LanguageEnglish
Pages830-843
Number of pages14
JournalBiological Rhythm Research
Volume49
Issue number6
Early online date15 Jan 2018
DOIs
Publication statusPublished - 2018

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sleep
Sleep
emotions
back (body region)
Psychological Tests
vigor
legs
Anger
Leg
Psychology
youth
effect
testing

Cite this

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title = "An investigation into sleep patterns and the effect of time of day on performance in youth swimmers",
abstract = "The purpose of this study was to investigate sleep patterns in competitive youth swimmers and to establish any time-of-day effect on physiological and psychological variables linked to swimming performance. Twelve swimmers (14.8 ± 2.1 years) underwent physiological and psychological tests in morning and evening and completed sleep diaries over a 2-week period. There was a non-significant effect between morning and evening swimming performance for 800 m (p = 0.068) and 50 m (p = 0.306). Handgrip strength was significantly greater in evening (p = 0.007), back and leg strength were significantly greater in morning (p = 0.013). There was no time-of-day effect for jump height (p = 0.756). The profile of mood states indicated significantly higher anger (p = 0.012) and vigour (p = 0.000) in the morning. Swimming performance was not significantly affected by time of day; however, physiological variables showed varied results. Multiple factors could be influencing results including training time and mood state so should be monitored closely by coaches.",
author = "Grant, {Marie Clare} and Jonathan Glen",
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language = "English",
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pages = "830--843",
journal = "Biological Rhythm Research",
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T1 - An investigation into sleep patterns and the effect of time of day on performance in youth swimmers

AU - Grant, Marie Clare

AU - Glen, Jonathan

PY - 2018

Y1 - 2018

N2 - The purpose of this study was to investigate sleep patterns in competitive youth swimmers and to establish any time-of-day effect on physiological and psychological variables linked to swimming performance. Twelve swimmers (14.8 ± 2.1 years) underwent physiological and psychological tests in morning and evening and completed sleep diaries over a 2-week period. There was a non-significant effect between morning and evening swimming performance for 800 m (p = 0.068) and 50 m (p = 0.306). Handgrip strength was significantly greater in evening (p = 0.007), back and leg strength were significantly greater in morning (p = 0.013). There was no time-of-day effect for jump height (p = 0.756). The profile of mood states indicated significantly higher anger (p = 0.012) and vigour (p = 0.000) in the morning. Swimming performance was not significantly affected by time of day; however, physiological variables showed varied results. Multiple factors could be influencing results including training time and mood state so should be monitored closely by coaches.

AB - The purpose of this study was to investigate sleep patterns in competitive youth swimmers and to establish any time-of-day effect on physiological and psychological variables linked to swimming performance. Twelve swimmers (14.8 ± 2.1 years) underwent physiological and psychological tests in morning and evening and completed sleep diaries over a 2-week period. There was a non-significant effect between morning and evening swimming performance for 800 m (p = 0.068) and 50 m (p = 0.306). Handgrip strength was significantly greater in evening (p = 0.007), back and leg strength were significantly greater in morning (p = 0.013). There was no time-of-day effect for jump height (p = 0.756). The profile of mood states indicated significantly higher anger (p = 0.012) and vigour (p = 0.000) in the morning. Swimming performance was not significantly affected by time of day; however, physiological variables showed varied results. Multiple factors could be influencing results including training time and mood state so should be monitored closely by coaches.

U2 - 10.1080/09291016.2018.1424774

DO - 10.1080/09291016.2018.1424774

M3 - Article

VL - 49

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JO - Biological Rhythm Research

T2 - Biological Rhythm Research

JF - Biological Rhythm Research

SN - 0929-1016

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