Influence of Exercise Time of Day on Salivary Melatonin Responses

International Journal of Sports Physiology and Performance
Lara A CarlsonAlexander J Koch

Abstract

Sleep deprivation negatively affects cognition, pain, mood, metabolism, and immunity, which can reduce athletic performance. Melatonin facilitates sleepiness and may be affected by the proximity of exercise to sleep. To evaluate the influence of exercise time of day on salivary melatonin (s-melatonin) responses. Twelve regularly exercising men (age 20.75 [0.62] y, height 1.75 [0.04] m, mass 73.63 [10.43] kg, and maximal oxygen consumption 57.72 [6.11] mL/kg/min) participated in a randomized, crossover design. Subjects completed 3 protocols-morning exercise (09:00 h), afternoon exercise (16:00 h), and no exercise (CON)-at least 5 d apart. Exercise sessions consisted of 30 min of steady-state running at 75% of maximal oxygen consumption. Saliva was collected via passive drool at 20:00, 22:00, and 03:00 h following all sessions. Repeated-measures analysis of variance revealed significant time (P = .001) and condition (P = .026) effects for melatonin. Levels of s-melatonin were significantly increased at 03:00 h compared with 20:00 and 22:00 h for all conditions. Post hoc analyses revealed that s-melatonin at 22:00 h was significantly higher after morning exercise (16.5 [7.5] pg/mL) compared with afternoon exercise (13.7 [6.1] pg/m...Continue Reading

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Citations

Mar 19, 2020·International Journal of Environmental Research and Public Health·Beata Rzepka-Migut, Justyna Paprocka
Jan 30, 2020·Cells·Alessandra StacchiottiLuigi Fabrizio Rodella
Sep 3, 2021·The Journal of Physiological Sciences : JPS·Joanna KrukEwa Duchnik
Jan 29, 2022·Antioxidants & Redox Signaling·Andreas DaiberThomas Münzel
Jan 28, 2022·Autism : the International Journal of Research and Practice·Andy Cy TseElvis Wh Lai

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