Melatonin is an Ergogenic Aid for Exhaustive Aerobic Exercise only during the Wakefulness Period

Author(s)

Beck, W. R. ^{[1, 2]} ; Scariot, P. P. M. ^[1] ; Gobatto, C. A. ^{[1, 2]}

Affiliation

^[1] Univ Estadual Campinas, Sch Appl Sci, Lab Appl Sport Physiol, BR-13484350 Limeira, SP - Brazil

^[2] Univ Estadual Campinas, Phys Educ, Campinas, SP - Brazil

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF SPORTS MEDICINE; v. 37, n. 1, p. 71-76, JAN 2016.
• Web of Science Citations: 4

Abstract

This study tested the ergogenic effects of acute administration of melatonin on exhaustive exercise (tlim) at the anaerobic threshold intensity (iAnT) during periods of lower (L) and higher (H) spontaneous physical activity in swimming rats. Additionally, we evaluated the time of day effect on aerobic exercise tolerance. The periods of L and H were determined gravimetrically. All animals were subjected to an incremental test to determine the iAnT. Melatonin was administered (10mg.kg(-1), intraperitoneal) and after 30min, the rats were subjected to tlim during the L (LM) or H (HM) period. Control groups were called LC and HC. The criterion of significance was 5%. Melatonin enhanced tlim by 169% during H (HC=72min; HM=194min; P<0.01; ES=1.23) and by 90% during L (LC=31min vs. LM=59min; P=0.39; ES=1.18), demonstrating a significant effect on tlim (F=10.35; P<0.01) and a strong effect size (ES). Additionally, tlim was higher during H (F=14.24; P<0.01). Melatonin is a reasonable ergogenic aid, particularly during the wakefulness period, and the exercise tolerance is dependent on the time of day for swimming rats. (AU)

• FAPESP's process: 09/08535-5 - Standardization and validity of aerobic and anaerobic tests in field and laboratory, using free, tethered and half-tethered running, in endurance and sprint runners
• Grantee: Claudio Alexandre Gobatto
• Support Opportunities: Regular Research Grants
• FAPESP's process: 10/13377-7 - Effects of light and time of day of swimming exercise until exhaustion at lactate minimum intensity on biochemistry and hematologic responses of rats
• Grantee: Wladimir Rafael Beck
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 11/13226-1 - Ergogenic response of melatonin during the nadir and acrophase of spontaneous activity: consequences on IKK/Nf-kB via
• Grantee: Wladimir Rafael Beck
• Support Opportunities: Scholarships in Brazil - Doctorate