Am J Phys Med Rehabil: Effects of elastic resistance exercise after knee replacement on muscle mass and body function in older women with osteoarthritis.

Knee arthritis is age-related, especially in patients who have underpredicttomy, and there is a higher risk of osteoporosis.
this study was designed to determine the effect of elastic resistance exercise training after knee replacement on muscle mass and body outcomes in older women with knee osteoarthritis.
, 60 elderly women who underwent one-sided primary knee replacement were randomly divided into experimental groups, trained in elastic resistance movement at 12wks after surgery, or in a control group, and received standard care.
measurements included body function performance (i.e. Timed Up and Go, gait speed, forward elongation, standing on one leg, standing on a timed chair), lean weight in the limbs, osteoarthritis index at Western Ontario and McMaster University.
evaluation point is 2 weeks before surgery (T0), 1 month after surgery (T1, before resistance exercise training), 4 months after surgery (T2, after resistance exercise training).
results showed that after 12wks elastic resistance exercise training, the weight change of the limbs of the experimental group was significantly greater than that of the control group (average difference of 0.81 kg, P-0.004).
elastic resistance exercise training also had a significant effect on timed Up and Go and gait speed, with average differences of 0.28 m/s (P .lt;0.001) and -2.66 seconds (P.lt;0.001), respectively.
in summary, the results of the study showed that the elastic resistance exercise training program for 12 weeks after knee replacement was beneficial to the muscle mass, activity ability and osteoarthritis index results of older women with knee osteoarthritis.
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