Journal Article (Refereed)
The effect of load and sex on kinematic and kinetic variables during the mid-thigh clean pull
Comfort, P & Jones, P & Udall, R 2015, 'The effect of load and sex on kinematic and kinetic variables during the mid-thigh clean pull', Sports Biomechanics, 14(2), pp.139-156.
Power is a fundamental component for many sporting activities; while the load that elicits peak power during different exercises and differences between sexes remains unclear. This study aims to determine the effect of sex and load on kinematic and kinetic variables during the mid-thigh clean pull. Men (n = 10) and women (n = 10) performed the mid-thigh clean pull at intensities of 40%, 60%, 80%, 100%, 120%, and 140% of one repetition maximum (1RM) power clean in a randomised and counter-balanced order, while assessing bar velocity, bar displacement, power, force, and impulse. Two-way analysis of variance revealed that men demonstrated significantly greater (p < 0.05) values for all variables across loads, excluding bar velocity. Men demonstrated significantly greater (p < 0.05) bar velocities with 40-80% 1RM; in contrast, women demonstrated significantly (p < 0.05) higher velocities with 120-140% 1RM. Irrespective of sex significantly greater (p < 0.05), system peak power, bar velocity, and displacement occurred with 40% 1RM. In contrast, peak force and impulse were significantly (p < 0.05) greater with 140% 1RM. When performing the mid-thigh clean pull, to maximise system power or bar velocity, lower loads (40-60% 1RM) are recommended. When training force production or impulse, higher loads (120-140% 1RM) are recommended, when using the mid-thigh clean pull.