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This is a literature review of different exercise regimens, in land or in water-based programs. Four randomized controlled trials were reviewed, including 378 subjects, age range 50 to 71 years old. Interventions had a length of 6 to 18 weeks, and session's duration varied from 30 to 60 minutes, two to three times per week. Interventions including water-based programs consisted of exercise for lower limbs, abdominal muscles and aerobics.
Results show a significant improvement in water-based exercise groups above 85%, and adherence is very higher compared to land exercise programs. Results on Tai-Chi also show an improvement Quality of the articles is very high, and Sillva et al (2008) has the higher score because it fullfills 10 out of 11 PEDro (Physiotherapy Evidence Database) criteria. We conclude that all kind of exercise benefit knee osteoarthitis patients, althoug higher benefits are found in water-based programs. We would recommend exercise in water to improve knee osteoarthritis symptosm. Future studies should increase sample size.
