1. A comparison of manual and automatic force-onset identification methodologies and their effect on force-time characteristics in the isometric midthigh pull.
- Author
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Guppy, Stuart N., Brady, Claire J., Kotani, Yosuke, Connolly, Shannon, Comfort, Paul, Lake, Jason P., and Haff, G. Gregory
- Subjects
BIOMECHANICS ,CROSS-sectional method ,WORK measurement ,RESEARCH funding ,ISOMETRIC exercise ,MUSCLE strength testing ,MUSCLE strength ,RESISTANCE training ,STRENGTH training ,THIGH ,ATHLETIC ability ,MUSCLE contraction - Abstract
The aim of this study was to assess the agreement of three different automated methods of identifying force-onset (40 N, 5 SDs, and 3 SDs) with manual identification, during the isometric mid-thigh pull (IMTP). Fourteen resistance-trained participants with >6 months experience training with the power clean volunteered to take part. After three familiarisation sessions, the participants performed five maximal IMTPs separated by 1 min of rest. Fixed bias was found between 40 N and manual identification for time at force-onset. No proportional bias was present between manual identification and any automated threshold. Fixed bias between manual identification and automated was present for force at onset and F
150 . Proportional but not fixed bias was found for F50 between manual identification and all automated thresholds. Small to moderate differences (Hedges g = −0.487- −0.692) were found for F90 between all automated thresholds and manual identification, while trivial to small differences (Hedges g = −0.122—−0.279) were found between methods for F200 and F250 . Based on these results, strength and conditioning practitioners should not use a 40 N, 5 SDs, or 3 SDs threshold interchangeably with manual identification of force-onset when analysing IMTP force–time curve data. [ABSTRACT FROM AUTHOR]- Published
- 2024
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