Kinetic and Kinematic Assessment of the Band-Assisted Countermovement Jump

John F T Fernandes, Jorge Arede, Hannah Clarke, Amador Garcia-Ramos, Alejandro Perez-Castilla, Jonty P Norris, Celeste A Wilkins, Amelia F Dingley

Research output: Contribution to journalJournal Articlepeer-review

Abstract

This study sought to elucidate kinetic and kinematic differences between unloaded and band-assisted countermovement jumps (CMJs). In a randomized order, 20 healthy subjects (mass 84.5 ± 18.6 kg) completed 3 repetitions of CMJs across 3 conditions: unloaded (at body mass), low, and moderate band (8.4 ± 1.9 and 13.3 ± 3.3 kg body weight reduction, respectively). For all repetitions, a force platform and linear position transducer were used to record and calculate kinetic and kinematic data. Body weight was significantly different between the unloaded, low, and moderate band conditions (p < 0.05). Peak velocity, absolute peak, and mean force and movement duration displayed a trend that was mostly related to the condition (i.e., unloaded > low > moderate) (p < 0.05). The opposing trend (i.e., moderate > low > unloaded) was generally observed for relative peak and mean force, reactive strength index modified, and flight time (p < 0.05). No differences were observed for mean velocity, movement duration, and absolute and relative landing forces (p > 0.05). The use of band assistance during CMJs can alter force, time, and velocity variables. Practitioners should be aware of the potential positive and negative effects of band assistance during CMJs. [Abstract copyright: Copyright © 2023 National Strength and Conditioning Association.]
Original languageEnglish
JournalJournal of Strength and Conditioning Research
Early online date2 Feb 2023
DOIs
Publication statusE-pub ahead of print - 2 Feb 2023

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