External kinetics of the kettlebell snatch in amateur lifters

Journal article


Ross, James A., Keogh, Justin W. L., Wilson, Cameron J. and Lorenzen, Christian. (2017). External kinetics of the kettlebell snatch in amateur lifters. PeerJ. 5, p. e3111. https://doi.org/10.7717/peerj.3111
AuthorsRoss, James A., Keogh, Justin W. L., Wilson, Cameron J. and Lorenzen, Christian
Abstract

Background
Kettlebell lifting has gained increased popularity as both a form of resistance training and as a sport, despite the paucity of literature validating its use as a training tool. Kettlebell sport requires participants to complete the kettlebell snatch continuously over prolonged periods of time. Kettlebell sport and weightlifting involve similar exercises, however, their traditional uses suggest they are better suited to training different fitness qualities. This study examined the three-dimensional ground reaction force (GRF) and force applied to the kettlebell over a 6 min kettlebell snatch set in 12 kettlebell-trained males.

Methods
During this set, VICON was used to record the kettlebell trajectory with nine infrared cameras while the GRF of each leg was recorded with a separate AMTI force plate. Over the course of the set, an average of 13.9 ± 3.3 repetitions per minute were performed with a 24 kg kettlebell. Significance was evaluated with a two-way ANOVA and paired t-tests, whilst Cohen’s F (ESF) and Cohen’s D (ESD) were used to determine the magnitude.

Results
The applied force at the point of maximum acceleration was 814 ± 75 N and 885 ± 86 N for the downwards and upwards phases, respectively. The absolute peak resultant bilateral GRF was 1,746 ± 217 N and 1,768 ± 242 N for the downwards and upwards phases, respectively. Bilateral GRF of the first and last 14 repetitions was found to be similar, however there was a significant difference in the peak applied force (F (1.11) = 7.42, p = 0.02, ESF = 0.45). Unilateral GRF was found have a significant difference for the absolute anterior–posterior (F (1.11) = 885.15, p < 0.0001, ESF = 7) and medio-lateral force vectors (F (1.11) = 5.31, p = 0.042, ESF = 0.67).

Discussion
Over the course of a single repetition there were significant differences in the GRF and applied force at multiple points of the kettlebells trajectory. The kettlebell snatch loads each leg differently throughout a repetition and performing the kettlebell snatch for 6 min will result in a reduction in peak applied force.

Keywordsresistance training; strength endurance; ground reaction force
Year2017
JournalPeerJ
Journal citation5, p. e3111
PublisherPeerJ Inc.
ISSN2167-8359
Digital Object Identifier (DOI)https://doi.org/10.7717/peerj.3111
Scopus EID2-s2.0-85016419818
Open accessPublished as ‘gold’ (paid) open access
Research or scholarlyResearch
Page range1-14
Publisher's version
License
File Access Level
Open
Output statusPublished
Publication dates
Print29 Mar 2017
Publication process dates
Accepted20 Feb 2017
Deposited17 May 2021
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