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Δευτέρα, 08 Οκτωβρίου 2012 11:30

Comparison of the effectiveness of isokinetic vs isometric therapeutic exercise in patients with osteoarthritis of knee

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Uganet Hernández Rosa, Jorge Velasquez Tlapanco, Catalina Lara Maya S Enrique Villarreal Ríos, Lidia Martínez González, Emma Rosa Vargas Daza y Liliana Galicia Rodríguez

Reumatol Clin. 2012:8(1):10-14

www.reumatologiaclinica.org

Introduction: Osteoarthritis is a chronic joint disease; isometric exercise leads to the development of mechanical work and isokinetic exercise leads to better joint mobility.

Objectives: To compare the effectiveness of isometric versus isokinetic therapeutic exercises in patients with knee osteoarthritis.

Material and methods: Quasiexperimental study in a population of 45 to 75 year old patients with a diagnosis of knee osteoarthritis. Group 1 (experimental) was put under isokinetic exercises and group 2 (control) under isometric exercises. The sample size was of 33 patients per group; the allocation to the experimentation or control group was nonrandom, but stratified by degrees of knee osteoarthritis.

The effectiveness of the exercise was measured in three dimensions; muscle strength, joint range and  pain. The intervention lasted eight weeks and the physical activity was carried out every third day. The statistical analysis included averages, standard deviation, pereentage, Chi square test, z test for two populations, t test for two independent populations and twin t test.

Results: The analysis of muselé strength comparing the eategories independently demonstrates differenees at 8 weeks; 33.3% of the isokinetie exercise is in the normal eategory and 15.2% in the isometric exercise (p= 0.04). There was not differenee of joint range between groups, despite finding a stage I range in 100.0% of the isokinetie group and 97.0% in the isometrie (p> 0.05) group. Pain was milder in the isokinetie exereise group at 8 weeks (p= 0.01 ).

Conclusions: Isokinetie exereises have a greater effectiveness than isometrie exercises for muscle strength and pain in patients with knee osteoarthritis. However, other studies with randomized designs are needed.

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