Evaluation of nocturnal vs. morning measures of heart rate indices in young athletes

The purpose of this study was to compare heart rate (HR) and heart rate variability in young endurance athletes during nocturnal sleep and in the morning; and to assess whether changes in these values are associated with changes in submaximal running (SRT) and counter-movement jump (CMJ) performance...

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Bibliographic Details
Published in:PloS one 2022-01, Vol.17 (1), p.e0262333-e0262333
Main Authors: Mishica, Christina, Kyröläinen, Heikki, Hynynen, Esa, Nummela, Ari, Holmberg, Hans-Christer, Linnamo, Vesa
Format: Article
Language:English
Subjects:
Adaptation, Physiological - physiology
Adolescent
Agreements
Athletes
Ballistocardiography
Biology and Life Sciences
Cardiorespiratory fitness
Centre - Swedish Sports Technology and Performance Research Centre (SPORTC)
Centrumbildning - Swedish Sports Technology and Performance Research Centre (SPORTC)
Endurance
Engineering and Technology
Female
Fitness
Fysioterapi
Health aspects
Health sciences
Heart beat
Heart rate
Heart Rate - physiology
Humans
Lactic acid
Male
Measurement
Medicine and Health Sciences
Methods
Physical Endurance - physiology
Physiological aspects
Physiology
Physiotherapy
Research and Analysis Methods
Running
Sensors
Sleep
Sleep - physiology
Sleep-wake cycle
Social Sciences
Teenage athletes
Training
Variability
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Summary:The purpose of this study was to compare heart rate (HR) and heart rate variability in young endurance athletes during nocturnal sleep and in the morning; and to assess whether changes in these values are associated with changes in submaximal running (SRT) and counter-movement jump (CMJ) performance. During a three-week period of similar training, eleven athletes (16 ± 1 years) determined daily HR and heart rate variability (RMSSD) during sleep utilizing a ballistocardiographic device (Emfit QS), as well as in the morning with a HR monitor (Polar V800). Aerobic fitness and power production were assessed employing SRT and CMJ test. Comparison of the average values for week 1 and week 3 revealed no significant differences with respect to nocturnal RMSSD (6.8%, P = 0.344), morning RMSSD (13.4%, P = 0.151), morning HR (-3.9 bpm, P = 0.063), SRT HR (-0.7 bpm, P = 0.447), SRT blood lactate (4.9%, P = 0.781), CMJ (-4.2%, P = 0.122) or training volume (16%, P = 0.499). There was a strong correlation between morning and nocturnal HRs during week 1 (r = 0.800, P = 0.003) and week 3 (r = 0.815, P = 0.002), as well as between morning and nocturnal RMSSD values (for week 1, r = 0.895, P
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0262333