Abstract
PURPOSE: Knee osteoarthritis is related to muscular pain and disability in elderly people. This study evaluated the effect of 12 week lower limb strength training on knee function and joint space narrowing (JSN) in elderly women with knee osteoarthritis. METHODS:Nine elderly women (mean 65yrs) performed lower limb strength training (leg press, leg extension, leg curl) for 12 weeks (2x/wk). Each session consisted of 3 sets and 15 repetitions with 70% one-repetition maximum (1RM). We measured peak torque and total work done with isokinetic equipment and JSN using magnetic resonance imaging (MRI). WOMAC index was used to evaluate the change of functional limitations. RESULTS:Peak torque at 60°/sec was improved in extensor (78%) and flexor (69%), also total work done at 180°/sec showed a significant increase in extensor (50%) and flexor (57%) following the training. JSN, an indicator of knee osteoarthritis progress, was not changed in both lateral and medial spaces of knee joint. The WOMAC-scores (pain, stiffness, functional disorder) positively changed with the training. CONCLUSIONS: We concluded that the lower limb strength training improve muscular strength and WOMAC-scores, whereas no negative effect was shown in joint space narrowing in the elderly with knee osteoarthritis.
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