Intersegmental moment analysis characterizes the partial correspondence of jumping and jerking

Cleather, Daniel J. and Goodwin, Jon E. and Bull, Anthony M. J. (2013) Intersegmental moment analysis characterizes the partial correspondence of jumping and jerking. Journal of Strength & Conditioning Research:, 27 (1). pp. 89-100. ISSN 1064-8011

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Official URL: http://http://dx.doi.org/10.1519/JSC.0b013e3182503...

Abstract

The aim of this study was to quantify internal joint moments of the lower limb during vertical jumping and the weightlifting jerk to improve awareness of the control strategies and correspondence between these activities, and to facilitate understanding of the likely transfer of training effects. Athletic men completed maximal unloaded vertical jumps (n = 12) and explosive push jerks at 40 kg (n = 9). Kinematic data were collected using optical motion tracking and kinetic data via a force plate, both at 200 Hz. Joint moments were calculated using a previously described biomechanical model of the right lower limb. Peak moment results highlighted that sagittal plane control strategies differed between jumping and jerking (p < 0.05) with jerking being a knee dominant task in terms of peak moments as opposed to a more balanced knee and hip strategy in jumping and landing. Jumping and jerking exhibited proximal to distal joint involvement and landing was typically reversed. High variability was seen in nonsagittal moments at the hip and knee. Significant correlations were seen between jump height and hip and knee moments in jumping (p < 0.05). Although hip and knee moments were correlated between jumping and jerking (p < 0.05), joint moments in the jerk were not significantly correlated to jump height (p > 0.05) possibly indicating a limit to the direct transferability of jerk performance to jumping. Ankle joint moments were poorly related to jump performance (p > 0.05). Peak knee and hip moment generating capacity are important to vertical jump performance. The jerk appears to offer an effective strategy to overload joint moment generation in the knee relative to jumping. However, an absence of hip involvement would appear to make it a general, rather than specific, training modality in relation to jumping.

Item Type: Journal Article
Uncontrolled Keywords: Musculoskeletal modeling -- Joint moments -- Weightlifting -- Transfer -- Correspondence -- Lower limb -- Biomechanics
Subjects: 600 Technology > 612 Human physiology
700 The arts; fine & decorative arts; recreation > 796 Athletic & outdoor sports & games
School/Department: School of Sport, Health and Applied Science
Depositing User: Catherine O'Sullivan
Date Deposited: 24 Jun 2013 13:44
Last Modified: 01 Feb 2014 00:11
URI: http://research.stmarys.ac.uk/id/eprint/404

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