Strength training effects on physical performance and serum hormones in young soccer players |
| |
Authors: | E M Gorostiaga M Izquierdo M Ruesta J Iribarren J J González-Badillo J Ibáñez |
| |
Institution: | (1) Centro de Investigación y Medicina del Deporte de Navarra, Gobierno de Navarra, C/ Paulino Caballero 13, 31002 Pamplona, Spain;(2) Club Atlético Osasuna, Pamplona, Spain;(3) Centro Olímpico de Estudios Superiores, Comité Olímpico Español, Madrid, Spain |
| |
Abstract: | To determine the effects of simultaneous explosive strength and soccer training in young men, 8 experimental (S) and 11 control (C) players, aged 17.2 (0.6) years, were tested before and after an 11-week training period with respect to the load-vertical jumping curve loads of 0–70 kg (counter-movement jump CMJ0–70)], 5- and 15-m sprint performances, submaximal running endurance and basal serum concentrations of testosterone, free testosterone and cortisol. In the S group, the 11-week training resulted in significant increases in the low-force portion of the load-vertical jumping curve (5–14% in CMJ0–30, P<0.01) and in resting serum total testosterone concentrations (7.5%, P<0.05), whereas no changes were observed in sprint running performance, blood lactate during submaximal running, resting serum cortisol and resting serum free testosterone concentrations. In the C group, no changes were observed during the experimental period. In the S group, the changes in CMJ0 correlated (P<0.05–0.01) with the changes in the 5-m (r=0.86) and 15-m (r=0.92) sprints, whereas the changes in CMJ40 correlated negatively with the changes in the testosterone:cortisol ratio (r=–0.84, –0.92, respectively, P<0.05). These data indicate that young trained soccer players with low initial strength levels can increase explosive strength by adding low-frequency, low-intensity explosive-type strength training. The inverse correlations observed between changes in CMJ40 and changes in the testosterone:cortisol ratio suggest that a transient drop in this ratio below 45% cannot always be interpreted as a sign of overstrain or neuroendocrine dysfunction.An erratum to this article can be found at |
| |
Keywords: | Soccer Strength training Endurance Vertical jump Testosterone |
本文献已被 PubMed SpringerLink 等数据库收录! |
|