Aim. This study examined the predictive relationships between the salivary free testosterone (T) concentrations of elite athletes and the expression of force and power. Methods. A group of elite male rugby players (N.-64) were assessed for peak force (PF), peak rate of force development (PRFD), force at 100 milliseconds (F100 ms) and 250 milliseconds (F250 ms) during an isometric mid-thigh pull (IMTP), and/or peak power (PP) and height during a countermovement jump (CMJ). Saliva samples were collected before testing and assayed for free T. Relationships between individual T concentrations and performance were assessed as a pooled group and 4 sub-groups of equal size. Results. As pooled data sets, none of the IMTP and CMJ performance variables were significantly correlated with free T in either the PF or PP groups (r0.01-0.23). The PF and PP abilities of the 4 sub-groups were significantly different, so that PF1>PF2>PF3>PF4 (PPP2>PP3>PP4 (P
|Number of pages||7|
|Journal||Journal of Sports Medicine and Physical Fitness|
|Publication status||Published - 2012|
Crewther, B. T., Kilduff, L. P., Cook, C. J., Cunningham, D. J., Bunce, P., Bracken, R. M., & Gaviglio, C. M. (2012). Relationships between salivary free testosterone and the expression of force and power in elite athletes. Journal of Sports Medicine and Physical Fitness, 52(2), 221-227.