1. Isokinetics and Exercise Science
Issue: Volume 12, Number 2 / 2004
Pages: 99 - 104
URL: Linking Options
Knee angle does not affect ankle eversion to
inversion peak torque ratios derived from an
isokinetic dynamometer
Gary Keith Porter and Thomas W. Kaminski
A1
Athletic Training/ Sports Medicine Research Laboratory, 105D Florida Gymnasium, University of Florida, Gainesville, FL
32611, USA. Tel.: +1 352 334 5000 x5362; E-mail: gkp@ufl.edu
A2
University of Delaware, Department of Health, Nutrition & Exercise Sciences, Human Performance Laboratory, Fred Rust
Ice Arena, 541 South College Avenue, Newark, DE 19716, USA. Tel.: +1 302 831 6402; Fax: +1 302 831 3693; E-mail:
kaminski@udel.edu
Abstract:
The purpose of this study was to examine varying degrees of knee
flexion on isokinetic eversion (E) to inversion (I) strength ratios.
Twenty healthy subjects volunteered for this study. Concentric
(CON) peak torque (PT) of both ankles (dominant, non-dominant) at
three different angles of knee flexion (15°, 30°, 45°) and two different
velocities (30°/s, 120°/s) was assessed with ankle plantar flexion
maintained at 10°. The E_{CON}:I_{CON} ratios at 30°/s ranged
from 0.87 to 1.04 across all three angles, while those at 120°/s
ranged from 0.86 to 1.00 indicating no differences in ratios between
knee-flexion angles or ankles. However, there was a trend in lower
ratios evident in the dominant compared to non-dominant ankles.
These results suggest that subjects may be positioned with knee
flexion angles ranging from 15° to 45° without influencing the
outcome of the ankle eversion and inversion strength
measurements.