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Published: 2020-06-10

Kinematics of assisted and unassisted plyometric training of vertical jumping and rebounding in youth male football players – A six-week training study

Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
Assisted plyometric training unassisted plyometric training youth football kinematics


The purpose of this study was to compare the kinematics of assisted and unassisted plyometric training of vertical jumping and rebounding activities following a six-week training intervention. 13 youth males from a professional football academy completed six weeks of either unassisted (n = 6) or band-assisted (n = 7) plyometric training sessions twice a week during their competitive season. Pre- and post-assessments of counter-movement jump (CMJ) height, 50 cm drop-jump (DJ50) ground contact time (GCT), jump height and reactive strength index (RSI), and submaximal-hopping (SMH) GCT, jump height and RSI were compared. Pre- and post-assessment ankle angle at touch-down (TD), peak flexion (PF) and mid-flight (MF) were also analysed for the submaximal-hop test only. Following training, significant main effects of time were observed for CMJ height, DJ50 GCT and MF ankle angle (p < 0.05) and a significant effect of group was observed for DJ50 RSI (p < 0.05). These results suggest that both unassisted and assisted plyometric training may be useful for enhancing the kinematics and technical performance of plyometric activities in a youth male football population.


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How to Cite

L. Bakker, C., F. Watson, M., & A. Moody, J. (2020). Kinematics of assisted and unassisted plyometric training of vertical jumping and rebounding in youth male football players – A six-week training study. International Journal of Physical Education, Fitness and Sports, 9(2), 57-71.