This study examined velocity-specific and mode-specific effects of eccentric isokinetic training of the hamstrings. Female volunteers aged 21 to 40 were assigned to an exercise group (n = 17) or nonexercise group (n = 17). The average force of three concentric and eccentric hamstring contractions was evaluated pre- and post-training at 120°/sec ± 60°/sec. Subjects trained three times a week for six weeks with 15 maximal eccentric isokinetic contractions at 120°/sec. The ANOVA procedure and T-tests were used to determine the effects of training. A general linear model (GLM) for repeated measures determined the interaction effect between speed and mode. Results showed that the exercise group increased significantly (p < 0.0083) in eccentric force at all tested speeds and increased significantly (p < 0.0083) in concentric force at 120°/sec and 180°/sec. The GLM results showed no interaction effect between speed and mode. The study concluded that eccentric isokinetic training of the hamstrings at 120°/sec is not speed-specific at 120°/sec ± 60°/sec and is not mode-specific at 120°/sec and 180°/sec.
|Number of pages||7|
|Journal||Journal of Orthopaedic and Sports Physical Therapy|
|Publication status||Published - 1991|