Principal component analysis of lifting waveforms

Clinical Biomechanics
Allan T WrigleyJoan M Stevenson

Abstract

One limiting factor in lifting research design has been the inability to effectively analyze waveform data, especially when differences in body mass, height, and load magnitude influence the derived kinetic variables. The purpose of this study was to demonstrate the sensitivity of principal component analysis to quantify clinically relevant differences in kinetic lifting waveforms over three load magnitudes and between two separate populations. Principal component analysis was applied to five kinetic lifting waveforms. The derived principal component scores were used as the dependent measures in a two-way (clinical status x load magnitude) MANOVA. Significant low back pain group differences (P<0.05) were found for three of the principal component scores on extension moment generation in the sacral and thoracic regions and for trunk compression. Significant differences were found for each variable with respect to the magnitude across the entire lift time between the three load conditions, as well as four significant differences related to inferred mechanical changes that resulted from lifting increasingly heavier loads. Principal component analysis of kinetic lifting waveforms was shown to be insensitive to a confounding factor ...Continue Reading

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Feb 9, 2005·Clinical Biomechanics·Allan T WrigleyJoan M Stevenson

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Citations

Aug 1, 2013·Sports Biomechanics·Ezio PreatoniRenato Rodano
Nov 28, 2013·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Sivan AlmosninoDavide D Bardana
Mar 12, 2009·Medicine and Science in Sports and Exercise·Kristian M O'Connor, Michael C Bottum
Oct 12, 2010·Clinical Biomechanics·Matthew CalhounVictoria L Chester
Jul 10, 2012·Journal of Biomechanics·Giulia MantovaniPaul E Beaulé
Jun 12, 2010·Journal of Biomechanics·Elizabeth A CraneGeoffrey E Gerstner
Apr 24, 2012·Computer Methods in Biomechanics and Biomedical Engineering·Steven L FischerWayne J Albert
Feb 9, 2018·Medicine and Science in Sports and Exercise·Gwyneth B RossRyan B Graham
Apr 29, 2011·Molecular Systems Biology·Rebecka JörnstenSven Nelander
Sep 5, 2020·Network Neuroscience·Deniz VatanseverJonathan Smallwood

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