improvement of kinetic, kinematic, and qualitative performance variables of the power clean with the hook grip'
Answers
PURPOSE:
The power clean (PC) and other weightlifting movements are commonly used in the development of muscular power. However, there is a paucity of research examining the use of the hook-grip (HG) in weightlifting performance. Therefore the purpose of this study was to compare one repetition maximum (1RM) and kinetic, kinematic, and qualitative variables across a range of loads (75-100%) during PC performance with a HG and a closed-grip (CG).
METHODS:
Eleven well-trained males (PC 1RM = 113.4 ± 15.9 kg, 1.34 x body mass) with at least three months of HG experience volunteered to participate. Following a familiarization session, 1RM testing with the HG and CG were completed five to seven days apart in a randomized order. Barbell kinetic and kinematic variables were recorded via a force platform and dual linear position transducer system.
RESULTS:
All subjects had a greater 1RM with the HG when compared to the CG (p < 0.001, ES = 0.43). Peak velocity (ES = 0.41-0.70), peak power (ES = 0.43-0.61), peak force (ES = 0.50-0.57) and catch height (ES = 0.40-0.96) were significantly greater (p < 0.05) when utilizing the HG at all, or most of the submaximal intensities. Additionally, subjects reported significantly greater perceptions of grip security, power and technical competency at submaximal, but not maximal loads.
CONCLUSIONS:
Therefore, athletes and coaches who implement weightlifting movements in their physical preparation should adopt the HG where possible. Furthermore, researchers and sports scientists should control and report the grip type used when performing weightlifting-type movements.