Time-of-Day Effects on Anaerobic Power and Concentration of Selected Hormones in Blind Men

Tomasz Pałka, Przemysław Pajor, Anna Katarzyna Tyka, Wanda Pilch, Agata Cebula, Aneta Teległów, Marek Strzała and Marcin Maciejczyk
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Tomasz Pałka: Department of Physiology and Biochemistry, Faculty of Physical Education and Sport, University of Physical Education, 31-571 Kraków, Poland
Przemysław Pajor: Doctoral Studies, University of Physical Education, 31-571 Kraków, Poland
Anna Katarzyna Tyka: Department of Recreation and Biological Regeneration, Faculty of Tourism and Leisure, University of Physical Education, 31-571 Kraków, Poland
Wanda Pilch: Department of Cosmetology, Faculty of Rehabilitation, University of Physical Education, 31-571 Kraków, Poland
Agata Cebula: Department of Biological Regeneration and Posture Correction, Faculty of Physical Education and Sport, University of Physical Education, 31-571 Kraków, Poland
Aneta Teległów: Department of Clinical Rehabilitation, University of Physical Education, 31-571 Kraków, Poland
Marek Strzała: Department of Water Sports, Faculty of Physical Education and Sport, University of Physical Education, 31-571 Kraków, Poland
Marcin Maciejczyk: Department of Physiology and Biochemistry, Faculty of Physical Education and Sport, University of Physical Education, 31-571 Kraków, Poland

IJERPH, 2021, vol. 18, issue 17, 1-12

Abstract: Knowledge of the circadian rhythm of the blind person and diurnal changes in anaerobic power and hormones concentration can create the possibility of individualising physical training. The aim of the study was to examine the time-of-day effects on anaerobic performance and the concentration of selected hormones. The measurements were performed at two different times of the day (10:00 a.m., 10:00 p.m.) in blind men at the age of 20–25 years old. The experiment group was chosen by using repeated hormonal tests four times a day so that each selected patient had a sleep/wake cycle even of 24 h. Anaerobic peak power and total work were tested in an anaerobic sprint test, and the concentration of growth hormone, testosterone, cortisol, and melatonin was determined. In blind men, the hormonal response was not driven by the photoperiod as in the control group. In the blind group, at 10:00 p.m., anaerobic peak power and total work results were significantly higher than at 10:00 a.m. and negatively correlated with melatonin levels. No such correlation was found in the control group.

Keywords: hormone; anaerobic power; physical fitness; blind men; melatonin; Wingate test (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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