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Title: Blunting of exercise-induced salivary testosterone in elite-level triathletes with a 10-day training camp
Authors: Hough, John
Robertson, Caroline
Gleeson, Michael
Keywords: Exercise training
Salivary cortisol
Issue Date: 2015
Publisher: © Human Kinetics
Citation: HOUGH, J., ROBERTSON, C. and GLEESON, M., 2015. Blunting of exercise-induced salivary testosterone in elite-level triathletes with a 10-day training camp. International Journal of Sports Physiology and Performance, 10 (7), pp. 935 - 938.
Abstract: Purpose: This study examined the influence of 10 days of intensified training on salivary cortisol and testosterone responses to 30-min, high-intensity cycling (55/80) in a group of male elite triathletes. Methods: Seven elite male triathletes (age 19 ± 1 y, VO2max 67.6 ± 4.5 mL · kg–1 · min–1) completed the study. Swim distances increased by 45%. Running and cycling training hours increased by 25% and 229%, respectively. REST-Q questionnaires assessed mood status before, during, and after the training period. Unstimulated saliva samples were collected before, after, and 30 min after a continuous, high-intensity exercise test. Salivary cortisol and testosterone concentrations were assessed. Results: Compared with pretraining, blunted exercise-induced salivary testosterone responses to the posttraining 55/80 were found (P = .004). The absolute response of salivary testosterone concentrations to the 55/80 decreased pretraining to posttraining from 114% to 85%. No changes were found in exercise-induced salivary cortisol concentration responses to the 55/80. REST-Q scores indicated no changes in the participants’ psychological stress–recovery levels over the training camp. Conclusions: The blunted exercise-induced salivary testosterone is likely due to decreased testicular testosterone production and/or secretion, possibly attributable to hypothalamic dysfunction or reduced testicular blood flow. REST-Q scores suggest that the triathletes coped well with training-load elevations, which could account for the finding of no change in the exercise-induced salivary cortisol concentration. Overall, these findings suggest that the 55/80 can detect altered exercise-induced salivary testosterone concentrations in an elite athletic population due to increased training stress. However, this alteration occurs independently of a perceived elevation of training stress.
Description: This paper is closed access.
Version: Published
DOI: 10.1123/ijspp.2014-0360
URI: https://dspace.lboro.ac.uk/2134/20927
Publisher Link: http://dx.doi.org/10.1123/ijspp.2014-0360
ISSN: 1555-0265
Appears in Collections:Closed Access (Sport, Exercise and Health Sciences)

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