Eccentric contractions are a functional component of human movement. With the advent of new equipment and current research findings, eccentric exercise is becoming more common in the physical therapy setting. The purpose of this study was to establish baseline values for healthy females during a maximum eccentric Hamstring (HS) and Quadricepts Femoris (QF) contraction. Fifty one healthy female volunteers from Pacific University were tested on a KIN/COM at 60, 120, 180 degrees/second.
Results indicated that as the speed of the eccentric contraction increased the average and peak torque values produced in the HS and QF muscle groups also increased. Generally, significant difference (p < 0.05) were identified for both average and peak torques between the speeds. Post hoc analysis indicated significant intergroup differences between speeds except for the QF (average and peak torque) between 120 and 180 degrees/second. HS/QF ratios were between .52 and .56 for average and peak torque values at all speeds. This baseline information can be used in the clinical setting for comparison and to help identify eccentric weakness in the HS or QF.
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