The ultimate goal of rehabilitation for patients with PFPS
is return to the highest functional level in the most efficient
manner.9 Accompanying this goal is the need for a testing
method that is objective, reliable, and sensitive to the changing
status of PFPS. Common objective measures of knee function
include pain assessment, goniometry, girth measurement, manual
muscle testing, and isokinetic evaluation. However, these
tests have been shown to be poor predictors of function.