Intra- and inter-day reliability of weightlifting variables and correlation to performance during cleans
Article
Sorensen, A., Chavda, S., Comfort, P., Lake, J. and Turner, A. 2022. Intra- and inter-day reliability of weightlifting variables and correlation to performance during cleans. The Journal of Strength and Conditioning Research. 36 (11), pp. 3008-3014. https://doi.org/10.1519/JSC.0000000000004241
Type | Article |
---|---|
Title | Intra- and inter-day reliability of weightlifting variables and correlation to performance during cleans |
Authors | Sorensen, A., Chavda, S., Comfort, P., Lake, J. and Turner, A. |
Abstract | The purpose of this investigation was to examine intra- and inter-day reliability of kinetic and kinematic variables assessed during the clean, assess their relationship to clean performance, and determine their suitability in weightlifting performance analysis. Eight competitive weightlifters performed 3 sets of single repetition cleans with 90% of their one-repetition maximum. Force-time data were collected via dual force plates with displacement-time data collected via 3-dimensional motion capture, on three separate occasions under the same testing conditions. Seventy kinetic and kinematic variables were analyzed for intra- and inter-day reliability using intraclass correlation coefficients (ICC) and the coefficient of variation (CV). Pearson’s correlation coefficients were calculated to determine relationships between barbell and body kinematics and ground reaction forces and for correlations to be deemed as statistically significant, an alpha-level of p ≤ 0.005 was set. Eleven variables were found to have ‘good’ to ‘excellent’ intra- and inter-day ICC (0.779-0.994 and 0.974-0.996, respectively) and CV (0.64-6.89% and 1.14-6.37%, respectively), with strong correlations (r = 0.880-0.988) to cleans performed at 90% 1RM. Average resultant force of the weighting 1 (W1) phase demonstrated the best intra- and inter-day reliability (ICC = 0.994 and 0.996 respectively), and very strong correlation (r = 0.981) to clean performance. Average bar power from point of lift off to peak bar height exhibited the highest correlation (r = 0.988) to clean performance. Additional reliable variables with strong correlations to clean performance were found, many of these occurred during or included the W1 phase, which suggests coaches should pay particular attention to the performance of the W1 phase. |
Keywords | weightlifting performance; kinetics; kinematics; performance variables; performance monitoring |
Research Group | Strength and Conditioning at the London Sport Institute |
Publisher | Lippincott, Williams and Wilkins |
Journal | The Journal of Strength and Conditioning Research |
ISSN | 1064-8011 |
Electronic | 1533-4287 |
Publication dates | |
Online | 23 Mar 2022 |
30 Nov 2022 | |
Publication process dates | |
Deposited | 13 Jan 2022 |
Submitted | 01 May 2021 |
Accepted | 11 Jan 2022 |
Output status | Published |
Accepted author manuscript | |
Copyright Statement | This is a pre-copyedited, author-produced version of an article accepted for publication in Journal of Strength and Conditioning Research. The published version of record - Sorensen, Angela M.; Chavda, Shyam; Comfort, Paul; Lake, Jason; Turner, Anthony N.. Intra- and Interday Reliability of Weightlifting Variables and Correlation to Performance During Cleans. Journal of Strength and Conditioning Research 36(11):p 3008-3014, November 2022. | DOI: 10.1519/JSC.0000000000004241 - is available online at: https://journals.lww.com/nsca-jscr/Abstract/2022/11000/Intra__and_In... and https://doi.org/10.1519/jsc.0000000000004241 |
Digital Object Identifier (DOI) | https://doi.org/10.1519/JSC.0000000000004241 |
Web of Science identifier | WOS:000872673600005 |
Language | English |
https://repository.mdx.ac.uk/item/89q00
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