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Coherence Between Power Production during Counter Movement Jump in a Smith Machine and Free Standing with External Loading | OMICS International | Abstract
ISSN: 2165-7025

Journal of Novel Physiotherapies
Open Access

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Short Communication

Coherence Between Power Production during Counter Movement Jump in a Smith Machine and Free Standing with External Loading

Marie Hilmersson1,2, Ida Edvardsson1 and Åsa B Tornberg2,3*
1 Surgical and Preoperative Science, Sports Medicine, Umeå University, Sweden
2 Department of Health Sciences, Division of Physiotherapy, Lund University, Baravägen 3, 221 85 Lund, Sweden
3 Genetic & Molecular Epidemiology (GAME) Unit, Lund University Diabetes Center (LUDC) Clinical Research Center, Skåne University Hospital, Lund University, Malmö, Sweden
Corresponding Author : Åsa B Tornberg
Department of Health Sciences
Division of Physiotherapy
Lund University, Lund, Sweden
Tel: +4646-2229766
Fax: +4646-2224202
E-mail: [email protected]
Received January 09, 2014; Accepted February 20, 2014; Published February 22, 2014
Citation: Hilmersson M, Edvardsson I, Tornberg AB (2014) Coherence Between Power Production during Counter Movement Jump in a Smith Machine and FreeStanding with External Loading. J Nov Physiother 4:195. doi: 10.4172/2165-7025.1000195
Copyright: © 2014 Hilmersson M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

The purpose of this study was to evaluate the coherence of power production during a Counter Movement Jump (CMJ) performed in a Smith Machine (SM) and Frees Standing (FS). Two female athletes performed 10 test sessions with three days in between. Each test session included two-legged CMJ performed in a SM and FS with external loads. Variables analyzed were Average Power (AP), Average Force (AF) and Average Velocity (AV). The correlation between the results from CMJ performed in a SM and FS was high (rp=0.87-1.0, p<0.001). The results showed a good test-retest reliability for all indices, for both CMJ performed in a SM and FS with Coefficient of Variance (CV) for AP (CVSM=3.1- 3.5 %; CVFS=2.9-4.8 %), AF (CVSM=1.6-1.9 %; CVFS=1.6-2.1 %), and AV (CVSM =1.7-2.7 %; CVFS =1.8-2.9 %). Though significantly higher values were seen during FS CMJ analyzed by Bland-Altman plots with AP (Bias: 13.7 W; LOA -19.1 to 46.5 W), AF (Bias: 2.7 N; LOA -7.0 to 12.4 N) and AV (Bias: 0.03 m/s; LOA -0.05 to 0.11 m/s). In conclusion, athletes and coaches are able to use both SM and FS CMJ to evaluate training progress, but they should be aware about the differences between SM and FS CMJ.

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