Effects of Hamstring Training in Different Modes on Stabilizing Knee Joints With Anterior Drawer Laxity
Question: To investigate how different modes of thigh muscles strengthening exercises emphasizing the knee internal rotators can be as effective as possible in improving the static stability and agility of the knees with anterior drawer laxity.
Design: Randomized controlled clinical trial.
Participants and Interventions:
Young men with anterior drawer laxity of the knee were randomly assigned to three experimental groups in different strengthening modes: plate-loaded squat press (SP), plate-loaded kneeling leg curl with internal rotation (KLCIR), and kneeling leg curl (KLC). The control group with stable knees received no training.
Outcome measures: static and dynamic knee stability, isokinetic strength. The purpose of this paper was to find out an optimal solution to the enhancement of the static and dynamic knee stability to a great extent.
Key words: anterior cruciate ligament; agility; knee stability; hamstring; knee internal rotator
|Knee Instability||Other: plate-loaded kneeling leg curl with internal rotation Other: plate-loaded squat press Other: plate-loaded kneeling leg curl|
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Effects of Hamstring Training in Different Modes on Stabilizing Knee Joints With Anterior Drawer Laxity|
- Static Knee Stability [ Time Frame: one year ]The KT-2000 knee ligament arthrometer (MED Metric Co., San Diego, USA) is designed to assess the anterior drawer laxity of the knee joint. The discrepancy of anterior displacement between the sound side and the lesion side is applied in evaluating the static stability of the knee.
- Agility [ Time Frame: one year ]shuttle run agility test
- Isokinetic Strength [ Time Frame: one year ]Cybex NORM (Cybex International, Inc, Ronkonkoma, New York, U.S.A.) was employed to evaluate isokinetic muscle strength before and after training.
- Age [ Time Frame: before training ]
|Study Start Date:||January 2006|
|Study Completion Date:||April 2007|
|Primary Completion Date:||January 2007 (Final data collection date for primary outcome measure)|
plate-loaded kneeling leg curl with internal rotation
Other: plate-loaded kneeling leg curl with internal rotation
The participant was instructed to point toes toward medial side as knee flexing. This is an open-kinetic chain (OKC) exercise and medial hamstring was emphasized.
Experimental: SP (Squat Press)
plate-loaded squat press
Other: plate-loaded squat press
The subject was instructed to position his back properly against the backrest on a machine, with the feet slightly apart. He was instructed to place his feet higher on the foot plate and draw his two knees as close as possible while the knees flexed so that medial hamstring would supposedly bear more tension in the course of knee flexion. This is a closed-kinetic chain (CKC) exercise and was expected to strengthen the quadriceps and hamstring with medial hamstring emphasized.
Other Name: angled leg presses
Experimental: KLC (Kneeling Leg Curl)
plate-loaded kneeling leg curl
Other: plate-loaded kneeling leg curl
An open-kinetic chain (OKC) exercise was intended to strengthen the hamstring muscle without lateralization emphasized.
Show Detailed Description
Please refer to this study by its ClinicalTrials.gov identifier: NCT01170546
|Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital|
|Principal Investigator:||Shih-Wei Chou||Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital|