Thermoregulation During Mild Exercise at Different Circadian Times

Waterhouse, Jim; Edwards, Benjamin; Bedford, Paul; Hughes, Amber; Robinson, Kirsty; Nevill, Alan M.; Weinert, Dietmar; Reilly, Thomas

doi:10.1081/cbi-120037799

Cited by 44 publications

(30 citation statements)

References 30 publications

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“…Studies evaluating the effect of circadian cycle in anaerobic threshold (AT) show contradictory results similar to ours, in which there are differences in AT different times of day [22,23], these studies serve as a parameter in our study since the Liglic presents a metabolic transition, we can infer that the interference of the cycle would continue regardless of the form to determine the Lan One hypothesis as a possible explanation for the findings in our study is that more than circadian variation, which interferes with physical performance rhythmicity is the time when the subjects performed their usual physical activities, which induce an adaptation of performance and thus would be possible to find differences in the charges assessed in the AT. This study had the limitation that no monitoring of athletes for more hours of the day, as their feed in the moments before the test.…”

Section: Discussioncontrasting

confidence: 49%

Circadian Cycle and Its Influence on Parameters of Aerobic Training

Cruz¹,

Manoel²,

Melo³

et al. 2014

AJSSM

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Objectives: This study aims to evaluate the Influence of two distinct Periods of the day on maximal aerobic power in young Athletes mountain bike. Volunteers are the mountain bike Athletes, 37.83 ± 8.87 years, and underwent two progressive maximal exercise test on a cycle Ergometer at two times of day. Gauging the behavior glucose and heart rate. The verification of normality of data was performed by the Shapiro-Wilk test for analysis of variables was Adopted t test for paired samples. Statistical we Adopted an evidence for p <0.05. Results: Were the glucose threshold results not statistically significant. However trends indicating were there a better outcome in the evening. The maximal workload, maximal heart rate and glycemic load threshold. Conclusions: The results show trends on performance and circadian rhythm, and yet, the routine or team chosen for sensivity training appears to the circadian cycle.

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Section: Discussioncontrasting

confidence: 49%

Circadian Cycle and Its Influence on Parameters of Aerobic Training

Cruz¹,

Manoel²,

Melo³

et al. 2014

AJSSM

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“…So, the diurnal difference observed for the asymptotic value indicates that thermoregulatory mechanisms in response to exercise are less efficient during the morning session that may be due to the heat gain mode in the morning which may tend to enhance heat storage. As previously discussed by Morris et al (2009), the reported discrepancies could be explained by time of day testing (Waterhouse et al, 2004(Waterhouse et al, , 2005, physical fitness (Atkinson et al, 1993), age (Gubin et al, 2006), and perhaps measurement site, due to local warming.…”

Section: Discussionmentioning

confidence: 75%

“…Thus, a peak of peripheral vasodilatation is observed in the late evening and a minimum in the morning, which respectively fit with the time of rapid decrease and increase of core temperature (Aschoff and Heise, 1972;Hildebrandt, 1974;Krauchi and Wirz-Justice, 1994;Smolander et al, 1993). These strategies are actually assimilated to ''heat gain'' mode in the morning and ''heat loss'' mode in the evening (Aldemir et al, 2000;Waterhouse et al, 2004Waterhouse et al, , 2007.…”

Section: Introductionmentioning

confidence: 87%

Core temperature response to cycling exercise: Effect of time of day and measurement site

Chapon

Bessot

Gauthier

et al. 2012

Journal of Thermal Biology

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“…In relation to thermoregulation, several studies have examined circadian rhythms in thermoregulation during exercise. Studies by Waterhouse et al 43,44) have shown that the thermoregulatory response during moderate-intensity aerobic exercise differs depending on the resting core temperature itself and the rising/falling phase of core temperature circadian rhythm. In these studies, the thermoregulatory response decreased at a lower core temperature and during the rising phase.…”

Section: A Variety Of Human Circadian Rhythms and Characteristicsmentioning

confidence: 99%

“…Better in the morning than in the evening Muscle strength 29,30) Sleep propensity 23) Body balance control 35) Accuracy 36) Maximal oxygen consumption 38) Aerobic contribution to Wingate test 40) Thermoregulatory responses 43,44) Primary factor to affect mental performance Psychomotor performance Physical performance and Fitness components…”

Section: Effects Of Exercise On Human Circadian Rhythmsmentioning

confidence: 99%

Human circadian rhythms and exercise: Significance and application in real-life situations

Mizuno

2014

JPFSM

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This review introduces a variety of human circadian rhythms including physiological processes and mental and physical performances, with reference to real-life situations. Circadian rhythms play a role in physiological processes, such as core body temperature and plasma melatonin, which are recognized as the body clock. As humans are diurnal organisms, mental performance declines primarily at night, secondarily in the early afternoon; this is consistent with risks of traffic and industrial accidents. Physical performance is composed of various fitness components and generally reaches its peak and nadir at around evening and early morning, respectively. Exceptions to this are body balance control and accuracy, both of which require brain function. Although maximal oxygen consumption (V ・ O 2 max) measured in the laboratory shows a constant value independent of the time of day, actual endurance capacity might be determined by core body temperature at the beginning of exercise, thermoregulatory response, and environmental temperature and humidity, all of which vary with the time of day. As the most powerful factor affecting the human circadian clock is bright light, physical exercise may be one factor entraining the human circadian pacemaker. However, experimental evidence has suggested that exercise itself has little or no influence on shifting the human master clock. Although further studies are required, recent studies have demonstrated that physical exercise at a certain time of day specifically improves physical performance at the same time, which might be independent of the master clock.

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Thermoregulation During Mild Exercise at Different Circadian Times

Cited by 44 publications

References 30 publications

Circadian Cycle and Its Influence on Parameters of Aerobic Training

Circadian Cycle and Its Influence on Parameters of Aerobic Training

Core temperature response to cycling exercise: Effect of time of day and measurement site

Human circadian rhythms and exercise: Significance and application in real-life situations

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