Water-Based Exercises Performed with High-Speed Movement Improves Strength and Physical Function in Older Women with Knee Osteoarthritis

Aims: To verify the effects of aquatic exercises performed with high-speed movement on physical function, muscle function, and quality of life of older women with knee osteoarthritis (KOA). Methods: This was a single-group experimental study with double pretest and a post-test. Dependent outcomes were assessed three times: 4 weeks before the intervention (pretest one), before the intervention (pretest two) and 16 weeks after (post-test). Women aged from 60 years with KOA (n = 12) participated in an aquatic exercise program during 16 weeks. Results: Outcomes did not change from pretest one to two. After the intervention, there were improvements in knee extensor strength (11%) and power (15.6 to 162%), and knee flexor power (40.7%). Performance of mobility (9.2%), strength (10.1%), aerobic capacity (13.2%) tests also improved. Participants' perceived quality of life related to KOA symptoms also increased. Conclusions: This intervention approach is feasible, effective, and safe for older women with KOA.