Faculty Publications

Title

Strength-power relationships during two lower extremity movements in female division I rowers

Document Type

Article

Keywords

Concentric-only, Force, Stretch-shortening cycle

Journal/Book/Conference Title

Journal of Exercise Physiology Online

Volume

9

Issue

3

First Page

41

Last Page

52

Abstract

The purpose of this study was to examine the role of strength in the ability to express power during concentric-only (CO) and stretch-shortening cycle (SSC) leg press movements in a group of similarly strength-trained members of a Division I female rowing team, and to observe the effect of load on the relationship between strength and power. Subjects (n=30) performed one-repetition maximum (1RM) tests on the Omnikinetic (Omk) dynamometer as well as two series (CO vs. SSC) of explosive leg presses with loads ranging from 30-80% 1RM. Moderate to strong relationships were observed between 1RM and peak power (PP) (r = 0.436 - 0.718) for both CO and SSC except for 80% CO and 70-80% SSC. There were few significant correlations between 1RM and power output during the initial 200 ms of the concentric phase (P50-200). Additionally, subjects were placed into high-RM (n=13, 1RM>187 kg) and low-RM (n=17, 1RM<187 kg) groups and compared. The high-RM group had significantly greater PP at all loads for both CO and SSC (p<0.05). There were no significant differences at P50 for both CO and SSC. Stronger subjects had significantly greater P100 at 30-50% CO and at 40% SSC, greater P150 at 30-50% CO and at 40% SSC as well as greater P200 at 30-50% CO and at 50-60% SSC. It appears that strength plays a significant role in PP during both CO and SSC leg press movements in similarly trained female Division I rowers and the effect of strength diminishes at the greatest loads.

Original Publication Date

12-1-2006

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