Background: Osteoarthritis (OA) is a highly prevalent and disabling disease. It is estimated that by 2030 the
prevalence of symptomatic OA could reach 30 % of the population above 60 years. This randomised controlled trial
will investigate the effect of low-level laser therapy (LLLT) and static stretching exercises, as monotherapy and in
combination, on pain, quality of life, function, mobility, knee range of motion (KROM) and hamstring shortening in
participants with knee OA