Affiliations: [a] Exercise and Sport Science Program, The University of
Tulsa, Tulsa, OK, USA
Note: [] Address for correspondence: John F. Caruso, Ph.D., 312 Chapman
Hall, 800 S. Tucker Drive, The University of Tulsa, Tulsa, OK 74104, USA. Tel.:
+1 918 631 2924; Fax: +1 918 631 2068; E-mail: john-caruso@utulsa.edu
Abstract: To assess the subsequent testosterone/cortisol ratio (TCr) from
flywheel-based resistive exercise, using a within-subjects design volunteers (7
men, 10 women) performed three seated leg press workouts on an ergometer (YoYo
Technologies, Stockholm Sweden). Comprised of ten-repetition sets, the workouts
entailed: a three-set protocol composed of concentric and eccentric actions
(CE3), as well as concentric-only paradigms of three (CO3) and six (CO6) sets.
Venous blood, collected before bouts and at one and 30 minutes post-exercise,
was used to quantify the TCr. Data were examined with ANOVA and multivariate
regression. ANOVA yielded a gender x time TCr interaction, as male values
declined significantly yet women's data were unchanged. With the TCr at one and
30 minutes post-exercise as separate criterion measures, and data pooled across
genders and workouts, multivariate regression revealed significance per
dependent variable. Univariate correlations showed the best predictors of the
post-exercise TCr in descending order were: body mass, average power and delta
lactate. Gender and quadriceps muscle volume may have acted as confounding
variables to allow body mass to the best current study predictor. Continued
research should examine additional predictor variables, as current results only
accounted for roughly 30% of the total criterion measure variance.
