Salivary hormonal values from high-speed resistive exercise workouts.
Our study purpose examined salivary hormonal responses to high-speed resistive exercise. Healthy subjects (n = 45) performed 2 elbow flexor workouts on a novel (inertial kinetic exercise; Oconomowoc, WI, USA) strength training device. Our methods included saliva sample collection at both preexercise and immediately postexercise; workouts entailed two 60-second sets separated by a 90-second rest period. The samples were analyzed in duplicate for their testosterone and cortisol concentrations ([T], [C]). Average and maximum elbow flexor torque were measured from each exercise bout; they were later analyzed with a 2(gender) × 2(workout) analysis of variance (ANOVA) with repeated measures for workout. The [T] and [C] each underwent a 2(gender) × 2(time) ANOVA with repeated measures for time. A within-subject design was used to limit error variance. Average and maximum torque each had gender (men > women; p < 0.05) effects. The [T] elicited a 2-way interaction (p < 0.05), as men incurred a significant 14% increase over time, but women's values were unchanged. Yet multivariate regression revealed that 3 predictor variables (body mass and average and maximum torques) did not account for a significant amount of variance associated with the rise in male [T]. Changes in [C] were not significant. In conclusion, changes in [T] concur with the results from other studies that showed significant elevations in male [T], despite the brevity of current workouts and the rather modest volume of muscle mass engaged. Practical applications imply that salivary assays may be a viable alternative to blood draws from athletes, yet coaches and others who may administer this treatment should know that our results may have produced greater pre-post hormonal changes if postexercise sample collection had occurred at a later time point.
Exercise Physiology Laboratory, Exercise and Sports Science Program, The University of Tulsa, Tulsa, Oklahoma, USA. john-caruso@utulsa.edu
John F
JF
Caruso
Brant M
BM
Lutz
Mark E
ME
Davidson
Kyle
K
Wilson
Chris S
CS
Crane
Chrsity E
CE
Craig
Tim E
TE
Nissen
Melissa L
ML
Mason
Michael A
MA
Coday
Robert J
RJ
Sheaff
William T
WT
Potter
D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000032:analysis / Q000502:physiology*; D008297:Male; D005082:Physical Exertion / Q000502:physiology*; D055070:Resistance Training; D012463:Saliva / Q000737:chemistry*; D012737:Sex Factors; D013739:Testosterone / Q000032:analysis / Q000502:physiology*
D013739:Testosterone; D006854:Hydrocortisone