Date of Award

5-2016

Document Type

Open Access Thesis

Degree Name

Master of Science (MS)

Department

Kinesiology

First Advisor

Jeffrey Bauer, Ph.D.

Second Advisor

Larissa True, Ph.D.

Third Advisor

Peter M. McGinnis, Ph.D.

Abstract

The purpose of this study was to determine the optimal combination of lifting method and load intensity for power production during the hang clean. Twenty college students (18 male, 2 female) performed one set of three repetitions of the hang clean at four different intensities for each method while standing on a force platform embedded in the floor. Intensities were set at 50%, 60%, 70%, and 80% 1RM and the methods tested were Contact, where the participant maintained contact with the force platform throughout the lift, and Jump, where the participant jumped through the pull phase of the lift and became airborne. Each participant performed a total of 24 repetitions. There was a statistically significant interaction between lifting method and load intensity on power production (p < .05). Simple main effects were examined and for the contact method power production was significantly different between the four intensities (p < .05). Post hoc analyses with a Bonferroni adjustment indicated that power production increased significantly from 50% 1RM to 80% 1RM. Specifically, power production was significantly greater at 80% 1RM than 50% 1RM (p < .05). Power production was also significantly greater at 70% 1RM than 50% 1RM (p < .05). Power production at 70% 1RM was significantly greater than power production at 50% 1RM regardless of method (p < .05). The jump method produced significantly more power at each intensity than the contact method (p < .05). In order to maximize power production, it is recommended that when it can be executed safely and correctly, athletes should employ the jump method when performing the hang clean. Until this competency is attained, using the contact method at heavier intensities is indicated to elicit greater power output.

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