Coupled with the previous research on
VAS scores following rehabilitative intervention,
it is important to note that pain is
a purely subjective measure. Participants
were asked to rate their worst pain in the
previous week, forcing them to compare
their pain to an abstract maximum, not
to a previous pain experience. Although
the VAS has been deemed a reliable measure
of pain symptoms and is widely used
in PFPS literature, its use in linear studies
of patients with chronic pain may be
less reliable.9 We did see a decrement in
pain overall. However, the wording of our
VAS question, which asked participants to rate their pain at its worst, could have
revealed episodic pain changes rather
than overall improvement.