Another concern was subject adherence. Subjects were
questioned at the initial and 3-week visits about how
often and how long they should and did stretch. In
nearly all cases, the subjects were able to recite the
appropriate frequency and duration and to demonstrate
the stretching regimen. No measures were implemented
to monitor adherence in either group. Although subject
adherence was adequate to demonstrate increased flexibility
over 6 weeks, it is possible that the level of
adherence in one group or in both groups was inadequate
to demonstrate differences between the groups. In
future studies, researchers might consider using an
exercise log, self-report survey, or supervised in-clinic
stretching to regulate subject adherence.