Unless muscle activity changes are accompanied by
improved function, it is questionable whether the
changes are successful compensations. Prior to beginning
the training program, the subjects in our study had
a high functional level, in part due to the requirement
of meeting the screening examination criteria. Because
of this high initial level, scores on the timed hop test did
not improve. The KOS-ADLS and Global Rating scores,
which account for a variety of activities, did improve,
and the subjects returned to high level activities without
knee instability, confirming our hypothesis that the muscle
activity alterations we found were evidence of successful
compensations.