The “personal record” estimates strength endurance performance in the Clean & Jerk workout: an analysis of the Crossfit® GRACE Benchmark
Abstract
We aimed to investigate whether personal record (PR), anthropometric variables and experience would adequately explain variations in Clean and Jerk (C&J) strength endurance performance. 30 Crossfit® competing (CF) participants were recruited in stages. The 1st visit consisted of a bioimpedance analysis and familiarization with effort regulation against the GRACE benchmark (30 reps of C&J). Participants who were not eligible for RX were excluded. The remainder were stratified into 2 categories RX elite (performance time < 3 min) and RX intermediate (> 3 min). On the 2nd visit, the PR was determined only for intermediate RX participants. On the 3rd visit, the subjects underwent GRACE in the shortest possible time. Linear regression established the association of PR, anthropometric variables and experience time on C&J performance time. The results demonstrate a significant association between PR loads and C&J strength endurance performance (r = -0.690; R2 = 0.482; p = 0.001), suggesting that PR would explain 48% of the variations in performance. There was no relevance between the amount of lean mass (r = -0.314; p = 0.220), percentage of fat (r = 0.274; p = 0.228) and level of experience (r = -0414; p = 0.098) and performance GRACE. It is concluded that C&J PR values moderately explain variations in GRACE strength endurance performance. However, it is not possible to say the same for anthropometric variables and experience.
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References
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