The sport of weightlifting has been competed since the first modern Olympiad. Competition in weightlifting consists of 3 attempts the snatch and clean and jerk declared by the athlete and their coach prior to the starting of the lift. While waiting for the athlete’s lift, waiting periods can change and warm up attempts may need to be adjusted. Often, coaches prescribe either a complete “light power” or partial “heavy pull” repetition of the competed movement during a long wait. Previous literature indicates that a heavier stimulus may cause a “post-activation potentiation”, or “post-activation performance enhancement” effect on the subsequent lift. However, some evidence indicates that a heavy pull closely preceding a subsequent clean may disrupt technique. Despite the common practice to perform a heavy pull or lighter power clean or snatch in the warmup area, little information is known about whether this movement will potentiate the following repetition or disrupt technique. The purpose of this investigation was to investigate the potentiation and technique effects of the heavy pull and light power on a subsequent clean. Methods: The subjects (males n = 9; females n= 2) were eleven well-trained athletes (weightlifting, track and field, crossfit) in the clean. After warmup, a series of cleans were performed leading to a 90 % 1 RM clean followed by a 75% power clean or 112% clean pull (order randomly assigned), this was followed by a 90% clean. Kinematics were measured using Qualisys M3 motion capture. Subjective effort was measured after each 90% clean using rating of perceived exertion (RPE). Results: Men were stronger than women how ever there was no difference in the outcome. Peak bar velocity was not statistically different pre-post (p≥ 0.5). Vertical displacement was not statistically different pre-post (p≥ 0.5). Horizontal displacement was not statistically different (p≥ 0.5). Catch phase duration was not statistically different (p≤ 0.5), however effect size indicates small to moderate decreases in duration in both conditions. Stronger athletes appeared to have less technical disruption compared to lesser lifters. Following the power clean there was a statistically significant reduction in RPE (p ≤0.5, cohen’s d=0.595 95%CI=0.171 to 1.02).
| Identifer | oai:union.ndltd.org:ETSU/oai:dc.etsu.edu:etd-6001 |
| Date | 01 December 2024 |
| Creators | DeVirgiliis, Luke |
| Publisher | Digital Commons @ East Tennessee State University |
| Source Sets | East Tennessee State University |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | Electronic Theses and Dissertations |
| Rights | Copyright by the authors. |
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