The major limitation of the current study was its short follow-up period. The outcomes were assessed seven days after the 5-week intervention. Moreover, the age range was too large, in subjects of 40 and 80 years old especially, when functional capacity by 6-MWT or ROM is assessed. Therefore, a further research should involve a narrower age range of the subjects to investigate the long-term results of such an intervention in people suffering from knee OA.