Nocturnal exercise phase delays circadian rhythms of melatonin and thyrotropin secretion in normal men

A nocturnal period of physical exercise under dim light delays the onset of melatonin secretion, a healthy endocrine marker of circadian phase, within one day. Vasopressin and corticotropin releasing hormones induce the release of adrenocorticotropic hormone and cortisol. Daytime exercises increase TSH levels and increases TSH levels in the first half of the night.