Circadian rhythms in exercise performance implications for hormonal and muscular adaptation CQU.pdf (364.99 kB)
Download fileCircadian rhythms in exercise performance: Implications for hormonal and muscular adaptation
journal contribution
posted on 2022-10-24, 23:29 authored by Wei-Peng TeoWei-Peng Teo, M Newton, M McGuiganAlmost 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
10Issue
4Start Page
600End Page
606Number of Pages
7ISSN
1303-2968Location
TurkeyPublisher
Journal of Sports Science and MedicineFull Text URL
Additional Rights
CC BY-NC-ND 4.0Language
en-ausPeer Reviewed
- Yes
Open Access
- Yes
External Author Affiliations
Auckland University of Technology; Edith Cowan University; New Zealand Academy of Sport;Era Eligible
- Yes