In a recent double-blind, randomized,
placebo-controlled clinical
trial,22 the authors evaluated the
efficacy of PSW treatment associated
with exercises compared with
a placebo intervention in the same
population. In the active group, the
PSW treatment was applied with a
mean power of 3.2 W and a session
time of 20 minutes. The results
indicated that there was no difference
in function and pain levels
between the active group and the
placebo group.