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AuthorSouissi, Amine
AuthorYousfi, Narimen
AuthorDabboubi, Rim
AuthorAloui, Ghaith
AuthorHaddad, Monoem
AuthorSouissi, Nizar
Available date2023-10-23T10:25:29Z
Publication Date2020
Publication NameBiological Rhythm Research
ResourceScopus
URIhttp://dx.doi.org/10.1080/09291016.2019.1573462
URIhttp://hdl.handle.net/10576/48757
AbstractExogenous melatonin supplementation may enhance endurance performance because of its pre-cooling effect. The present study aimed to evaluate the effect of acute melatonin ingestion on rectal temperature (Tre) response to submaximal exercise performed in moderate temperature. Eight students moderately trained aged between 20–23 years completed two experimental sessions in a randomized order. The subjects ran on a treadmill for 45 minutes at 60% of their maximal aerobic speed (MAS) after either melatonin-(6mg) or placebo ingestion. Tre, heart rate (HR), thermal sensation (TS) and rating of perceived exertion (RPE) were measured. Blood samples were taken before and after exercise to measure the hemoglobin (Hb), hematocrit (Hct), sodium (Na+) and potassium (K+) concentrations. Melatonin decreased resting Tre by ≈ 0.2°C, but it did not attenuate the increase in core temperature during exercise. At the end of the exercise, HR was significantly attenuated in melatonin condition compared with placebo condition. High dose of melatonin (>5 mg) is not recommended to attenuate the increase of core temperature during continuous exercise. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.
SponsorThis study was supported by the Laboratory of Biochemistry and Molecular Biology, Children's Hospital in Tunis, Tunisia.
Languageen
PublisherTaylor and Francis Ltd.
Subjectexercise
heart rate
Melatonin
rectal temperature
thermal sensation
TitleEffect of acute melatonin administration on physiological response to prolonged exercise
TypeArticle
Pagination980-987
Issue Number6
Volume Number51


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