Intra- and Interday Reliability of Weightlifting Variables and Correlation to Performance During Cleans.

Sorensen, A, Chavda, S, Comfort, P ORCID:, Lake, J and Turner, AN 2022, 'Intra- and Interday Reliability of Weightlifting Variables and Correlation to Performance During Cleans.' , Journal of strength and conditioning research .

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Sorensen, AM, Chavda, S, Comfort, P, Lake, J, and Turner, AN. Intra- and interday reliability of weightlifting variables and correlation to performance during cleans. J Strength Cond Res XX(X): 000-000, 2022-The purpose of this investigation was to examine intra- and interday 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 1-repetition maximum (1RM). Force-time data were collected via dual force plates with displacement-time data collected via 3-dimensional motion capture, on 3 separate occasions under the same testing conditions. Seventy kinetic and kinematic variables were analyzed for intra- and interday reliability using intraclass correlation coefficients (ICCs) 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 interday 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 interday 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 that coaches should pay particular attention to the performance of the W1 phase. [Abstract copyright: Copyright © 2022 National Strength and Conditioning Association.]

Item Type: Article
Schools: Schools > School of Health and Society
Journal or Publication Title: Journal of strength and conditioning research
Publisher: Lippincott, Williams & Wilkins
ISSN: 1533-4287
SWORD Depositor: Publications Router
Depositing User: Publications Router
Date Deposited: 15 Jun 2022 11:12
Last Modified: 15 Jun 2022 11:12

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