File(s) not publicly available

Circadian rhythms in exercise performance : implications for hormonal and muscular adaptation

journal contribution
posted on 06.12.2017, 00:00 by Wei-Peng TeoWei-Peng Teo, M Newton, M McGuigan
Almost all physiological and biochemical processes within the human body follow a circadian rhythm (CR). In humans, the suprachiasmatic nucleus regulates sleep-wake cycle and other daily biorhythms in line with solar time. Due to such daily physiological fluctuations, several investigations on neuromuscular performance have reported a distinct CR during exercise. Generally, peak performances have been found to occur in the early evening, at approximately the peak of core body temperature. The increase in core body temperature has been found toincrease energy metabolism, improve muscle compliance andfacilitate actin-myosin crossbridging. In addition, steroidal hormones such as testosterone (T) and cortisol (C) also display a clear CR. The role of T within the body is to maintain anabolism through the process of protein synthesis. By contrast, C plays a catabolic function and is involved in the response of stress. Due to the anabolic and catabolic nature of both T and C, it has been postulated that a causal relationship may exist between the CR of T and C and muscular performance. This review will therefore discuss the effects of CR on physical performance and its implications for training. Furthermore, this review will examine the impact of muscular performance on CR in hormonal responses and whether could variations in T and C be potentially beneficial for muscular adaptation.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

10

Issue

4

Start Page

600

End Page

606

Number of Pages

7

ISSN

1303-2968

Location

Turkey

Publisher

Journal of Sports Science and Medicine

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Auckland University of Technology; Edith Cowan University; New Zealand Academy of Sport;

Era Eligible

Yes

Journal

Journal of sports science and medicine.

Usage metrics

Exports