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Relationship Between Pregame Concentrations of Free Testosterone and Outcome in Rugby Union
Abstract
Purpose: To assess the measures of salivary free testosterone and cortisol concentrations across selected rugby union matches according to game outcome. Methods: Twenty-two professional male rugby union players were studied across 6 games (3 wins and 3 losses). Hormone samples were taken 40 min before the game and 15 min after. The hormonal data were grouped and compared against competition outcomes. These competition outcomes included wins and losses and a game-ranked performance score (1–6). Results: Across the entire team, pregame testosterone concentrations were significantly higher during winning games than losses (P = 5.8 × 10−5). Analysis by playing position further revealed that, for the backs, pregame testosterone concentrations (P = 3.6 × 10−5) and the testosterone-to-cortisol ratio T:C (P = .038) were significantly greater before a win than a loss. Game-ranked performance score correlated to the team’s pregame testosterone concentrations (r = .81, P = .049). In backs, pregame testosterone (r = .91, P = .011) and T:C (r = .81, P = .05) also correlated to game-ranked performance. Analysis of the forwards’ hormone concentrations did not distinguish between game outcomes, nor did it correlate with game-ranked performance. Game venue (home vs away) only affected postgame concentrations of testosterone (P = .018) and cortisol (P = 2.58 × 10−4). Conclusions: Monitoring game-day concentrations of salivary free testosterone may help identify competitive readiness in rugby union matches. The link between pregame T:C and rugby players in the back position suggests that monitoring weekly training loads and enhancing recovery modalities between games may also assist with favorable performance and outcome in rugby union matches.
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Provision of exogenous carbohydrates prior to and during soccer-specific exercise caused ~30% reductions in blood glucose concentrations during the initial stages of the second half.
“the provision of exogenous carbohydrates prior to and during soccer-specific caused ~30% reductions in blood glucose concentrations during the initial stages of the second half; a finding which has since been confirmed in both simulated and actual soccer match-play 4, 6 .”
From Half-time strategies to enhance second-half performance in team-sports players: A review and recommendations (2015) · cites this paper as [44]
The exercise-induced rebound glycaemic response is most likely explained by increased glucose uptake by previously active muscles, lowered catecholamine concentrations, and reduced stimulation of liver glycogenolysis causing transient reductions in blood glucose concentrations at the onset of the second half.
“This exercise-induced rebound glycaemic response is most likely explained by an increased glucose uptake by the previously active muscles, lowered catecholamine concentrations, and reduced stimulation of liver glycogenolysis can cause transient reductions in blood glucose concentrations at the onset of the second half 44 .”
From Half-time strategies to enhance second-half performance in team-sports players: A review and recommendations (2015) · cites this paper as [44]
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Metadata
- Authors
- Gaviglio, C. M., Crewther, B. T., Kilduff, L. P., Stokes, K. A., & Cook, C. J.
- Affiliations
- The University of Queensland (AU)
- Imperial College London (GB)
- Swansea University (GB)
- Engineering and Physical Sciences Research Council (GB)
- Venue
- International Journal of Sports Physiology and Performance
- Publisher
- Human Kinetics
- Published
- 2014-03
- Volume
- 9
- Issue
- 2
- Pages
- 324-331
- ISSN
- 1555-0265 (ISSN-L)
- 1555-0273
- OpenAlex
- W2135485400
- Cited by
- 49
- References
- 27
- Citations by year
- 2026: 2 · 2024: 4 · 2023: 3 · 2022: 5 · 2021: 2 · 2020: 5 · 2019: 4 · 2018: 9 · 2017: 6 · 2016: 3 · 2015: 2 · 2014: 4
- FWCI
- 5.20
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- International Journal of Sports Physiology and Performance (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
- Social Sciences › Psychology › Developmental and Educational Psychology › Sport Psychology and Performance
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
- Keywords
- free testosterone, salivary cortisol, testosterone/cortisol ratio, rugby union, match outcome, competitive readiness, playing position, team performance, home advantage, professional athletes
- MeSH terms
- Adult, Competitive Behavior, Football, Humans, Hydrocortisone, Male, Saliva, Testosterone, Time Factors, Biomarkers, Multivariate Analysis, Athletic Performance, Young Adult
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