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This publication is protected and can be accessed only from certain IPs.

Title: The impact of the time of day and shrt-term high-intensity physical activity on appetite perception, food intake and the plasma cortisol and melatonin concentration


Most people live according to their individual biological clock. In situations where the day-night rhythm is disturbed, there may be a dysfunction of coordination of various processes in our body. The aim of this study was to establish the effects of time of day and short-term exercise on appetite perception, food intake and the plasma melatonin and cortisol concentration. In the study took part 23 moderately active non-smokers aged 24-30 years. They were recruited from among trainee firefighters. The research consisted of Wingate Test to measure anaerobic power and capacity, Visual Analogue Scale (VAS) to assess the appetite, the Borg Rating of Perceived Exertion scale (RPE) to assess subjective perception of effort. At the same time points blood samples were obtained for the measurement of plasma cortisol and melatonin concentration. It was noted that short-term high-intensity physical exercise reduced the subjective assessment of appetite and consequently reduced energy intake independently of the time of day. What is more, better performance parameters were achieved by the subjects until midday hours. The time of day of physical activity and food intake had an effect on cortisol and melatonin levels. The research has shown that the time of day is an important aspect affecting the relationship between exercise, metabolism and appetite. Hormonal changes depend on many f ; actors, but in this case the determination of cortisol and melatonin levels depending on physical activity at different times of the day and eating meals will allow a better understanding of the circadian regulation of human metabolism.

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2 - studia doktoranckie

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Rada Dyscypliny Nauki o zdrowiu


Bilski, Jan ; Mazur-Biały, Agnieszka

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tylko w bibliotece

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Last modified:

Apr 8, 2024

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Apr 5, 2022

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Edition name Date
ZB-132366 Apr 8, 2024


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