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

Reeth, Olivier Van; Sturis, Jeppe; Byrne, Maria; Blackman, J. D.; L'Hermite-Balériaux, M; Leproult, Rachel; Oliner, Craig; Refetoff, Samuel; Turek, Fred W.; Cauter, Eve Van

doi:10.1152/ajpendo.1994.266.6.e964

Cited by 148 publications

(181 citation statements)

References 16 publications

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“…Among the different spectrums, circadian rhythms play a central role for the organism well-functioning, and entrainment (the synchronization of the circadian system within the 24-hours cycle) is on turn vital for a healthy functioning of the organism. In humans, the intrinsic period of a circadian rhythm is slightly longer than an exact 24-hours (Van Reeth et al, 1994); therefore it can happen that somehow in a person who is exposed to irregular environmental or behavioural conditions might experience a disruption within the circadian system. The regulation of the biological rhythm is a complex mechanism that involves peripheral, central and environmental factors.…”

Section: 'Overexposure' To Indoor Living and 'Light Pollution'mentioning

confidence: 99%

Trening ute eller inne? Rapport fra et prosjekt med datainnsamling under Forskningsdagene 2012

Calogiuri¹,

Weydahl²,

Mikkilä³

et al. 2015

SapReps

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Reciprocal benefits of physical activity and exposure to nature for greater gain in health promotion. <span style="font-size: 11pt; font-family: 'Calibri',sans-serif; line-height: 107%; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-ascii-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: minor-bidi;" lang="EN-US">Theoretical assumptions and description of a pilot study.<span style="font-size: 11pt; font-family: 'Calibri',sans-serif; line-height: 107%; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-ascii-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: minor-bidi;" lang="EN-US">Recent studies have highlighted that health problems connected to inactivity are not just associated to lack of exercise, but rather to sedentary behaviour in a broader sense. In a large longitudinal study in the U.S.A., it was found that the amount of time spent in sedentary behaviour, such as watching television, was associated with cause-specific mortality in normal adults, even in subjects who did engage in some exercise program including intensive physical activity PA (Matthews et al., 2012).Therefore, in health promotion, it is important to promote active lifestyles characterized by higher activity levels across the day, increasing the time and frequency one is engage in any body movement, rather than only promoting participation in exercise sessions taking place two or three times a week.

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Section: 'Overexposure' To Indoor Living and 'Light Pollution'mentioning

confidence: 99%

Trening ute eller inne? Rapport fra et prosjekt med datainnsamling under Forskningsdagene 2012

Calogiuri¹,

Weydahl²,

Mikkilä³

et al. 2015

SapReps

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“…There is massive evidence that PE may act as a non-photic synchronizer, being able to dislocate the circadian rhythms phase (17)(18)(19)(20)(21)(22)(23)(24) . This phenomenon may be observed when PE is applied in constant situations, in which the influence of other synchronizers both photic and non-photic are tried to be blocked.…”

Section: Physical Exercise As a Non-photic Synchronizermentioning

confidence: 99%

“…Van Reeth et al (1994) (24) followed such standard and tried to determine whether one single session of nocturnal PE is able to affect the expression of thyreotropin and melatonin rhythms 1 one day after exposition. Seventeen male healthy individuals, age range 20/ 30 years were studied.…”

Section: Physical Exercise As a Non-photic Synchronizermentioning

confidence: 99%

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Sincronização não-fótica: o efeito do exercício físico aeróbio

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Fortes

Santos

et al. 2007

Rev Bras Med Esporte

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The main alterations, either acute or chronic, caused by aerobic physical exercise (PE) over the body are generally well-known. However, there is a particular effect of PE which started to be elucidated in the beginning of the 90's in humans which has the capacity to alter the temporal relationship of the body with the environment. The modification of the expression of the circadian rhythms caused by PE qualifies it as a synchronizer of the biological oscillators. The main synchronizer of the biological rhythm is the light / dark geophysical cycle. The day / night rotation which occurs through differences in the luminosity levels is perceived through photic ways by the CTS. These stimuli, called photic, provide temporal information to the CTS synchronizing hence the biological oscillators to this environmental cycle. Other stimuli are also capable to synchronize them and are called non-photic synchronizers. This review writes about the effect of PE over the temporization system as well as discusses the possible and probable chronobiological applications of the mentioned knowledge. PE may affect the CTS through non-photic ways, being hence able to benefit health of individuals in several situations, such as transmeridian flights, night shift tasks and sleep disturbs. Moreover, we highlight that further studies should be conducted on individuals' routine in order to better understand the relationship between different synchronizers as well as their contribution in a real context.

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“…Apart from the effect of exercise on health, appropriately timed exercise periods are capable of altering the circadian rhythms in humans 22,23 and animals. [24][25][26][27] Either voluntary wheel running or forced treadmill running, scheduled at the same time each day, can entrain free-running rhythms in mice, 24,25 rats 26 and hamsters.…”

Section: Introductionmentioning

confidence: 99%

The effect of scheduled forced wheel activity on body weight in male F344 rats undergoing chronic circadian desynchronization

Tsai

2007

Int J Obes

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Objective: To examine whether scheduled forced wheel activity counteracts the increased body weight gain in rats undergoing chronic circadian desynchronization induced by repeated 12-h shifts in the light-dark cycle. Design: Four age-and body weight-matched groups of adult male F344 rats were subjected to 12-h intermittent forced wheel activity daily (2.2 km/day). Each group had the following schedule for 13 weeks: a fixed schedule of a daily 12:12-h light-dark cycle and activity training (WF); a fixed light-dark cycle and 12-h shifts twice a week in activity training (WS); 12-h shifts twice a week in the light-dark cycle and a fixed schedule of activity training (LSWF); and 12-h shifts twice a week in both the light-dark cycle and activity training (LSWS). Two additional age-and body weight-matched sedentary rat groups were selected from our database: one was maintained on a fixed light-dark cycle (LC) and the other was subjected to 12-h shifts twice a week in the light-dark cycle (LS). Results: The four rat groups that were exercised showed different response patterns of the daily body temperature rhythm to different combinations of forced activity and lighting schedules. Their food intake was more than that of the two sedentary rat groups, but their body weight was comparable with that of the LC rats and less than that of the LS rats during the forced activity period. The LSWS rats were heavier than the WF and WS rats in the first and second months of the experimental treatment, but their body weight was comparable with that of the WS and WF rats in the third month. Conclusion: Forced activity was effective in reducing the body weight gain in chronic circadian desynchronization that was induced by repeated shifts in the light-dark cycle, although such an effect might become significant only after some time.

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

Cited by 148 publications

References 16 publications

Trening ute eller inne? Rapport fra et prosjekt med datainnsamling under Forskningsdagene 2012

Trening ute eller inne? Rapport fra et prosjekt med datainnsamling under Forskningsdagene 2012

Sincronização não-fótica: o efeito do exercício físico aeróbio

The effect of scheduled forced wheel activity on body weight in male F344 rats undergoing chronic circadian desynchronization

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