Effect of plyometric training and subsequent detraining on changes in force-velocity relationship

Abstract

Effect of plyometric training and subsequent detrainingon changes in force-velocity relationshipAbstractPurpose: The purpose of this study was to investigate the effect of plyometric training and subsequentdetraining on changes in force-velocity relationship. Methods: Forty active students (mean±SD, age, 24±2.3years; weight, 75±5.6 kg; height, 176±8.3 cm) participated in this study. Subjects were divided into controland experimental groups. The Biodex and EMG were used to measure muscle contraction velocity and toassess muscle electrical activity. Subjects in control group were asked to continue their daily activities; while,subjects in experimental group participated in a 6-week plyometric training program. Data were collected atpre-training, post-training and post-detraining. The independent t-test, repeated measures of ANOVA andTukey's post-hoc tests were used for data analysis. Results: In the experimental group, a significant increasein EMG activity was observed in response to training for all movements (P>0.05); while the EMG activitywas significantly decreased in slow and moderate movements during detraining (P0.05).Conclusions: It seems that reductions in EMG activities of muscles were due to insufficient intensity ofmovements, because applying maximal velocity movements resulted in the maintenance of training-inducedphysiological adaptations.

Keywords

• plyometric training
• detraining
• force-velocity relationship