Effects of training and competition load on neuromuscular recovery, testosterone, cortisol, and match performance during a season of professional football

Journal article


Amber E. Rowell, Robert Aughey, W. G. Hopkins, Alizera Esmaeili, Brendan H. Lazarus and Stuart Cormack. (2018). Effects of training and competition load on neuromuscular recovery, testosterone, cortisol, and match performance during a season of professional football. Frontiers in Physiology. 9(668), pp. 1-11. https://doi.org/10.3389/fphys.2018.00668
AuthorsAmber E. Rowell, Robert Aughey, W. G. Hopkins, Alizera Esmaeili, Brendan H. Lazarus and Stuart Cormack
Abstract

Introduction: Training load and other measures potentially related to match performance are routinely monitored in team-sport athletes. The aim of this research was to examine the effect of training load on such measures and on match performance during a season of professional football.

Materials and Methods: Training load was measured daily as session duration times perceived exertion in 23 A-League football players. Measures of exponentially weighted cumulative training load were calculated using decay factors representing time constants of 3–28 days. Players performed a countermovement jump for estimation of a measure of neuromuscular recovery (ratio of flight time to contraction time, FT:CT), and provided a saliva sample for measurement of testosterone and cortisol concentrations 1-day prior to each of 34 matches. Match performance was assessed via ratings provided by five coaching and fitness staff on a 5-point Likert scale. Effects of training load on FT:CT, hormone concentrations and match performance were modeled as quadratic predictors and expressed as changes in the outcome measure for a change in the predictor of one within-player standard deviation (1 SD) below and above the mean. Changes in each of five playing positions were assessed using standardization and magnitude-based inference.

Results: The largest effects of training were generally observed in the 3- to 14-day windows. Center defenders showed a small reduction in coach rating when 14-day a smoothed load increased from –1 SD to the mean (-0.31, ±0.15; mean, ±90% confidence limits), whereas strikers and wide midfielders displayed a small increase in coach rating when load increased 1 SD above the mean. The effects of training load on FT:CT were mostly unclear or trivial, but effects of training load on hormones included a large increase in cortisol (102, ±58%) and moderate increase in testosterone (24, ±18%) in center defenders when 3-day smoothed training load increased 1 SD above the mean. A 1 SD increase in training load above the mean generally resulted in substantial reductions in testosterone:cortisol ratio.

Conclusion: The effects of recent training on match performance and hormones in A-League football players highlight the importance of position-specific monitoring and training.

Keywordsteam sport performance; mixed modeling; countermovement jump; salivary hormones; load monitoring
Year2018
JournalFrontiers in Physiology
Journal citation9 (668), pp. 1-11
PublisherFrontiers Media S.A.
ISSN1664-042X
Digital Object Identifier (DOI)https://doi.org/10.3389/fphys.2018.00668
Scopus EID2-s2.0-85048292130
Open accessPublished as ‘gold’ (paid) open access
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Open
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Deposited11 May 2021
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