Stretching exercises are commonly prescribed in training and rehabilitation programmes. The purpose of this study was to determine
the frequency of on-going hamstring stretching required to maintain knee extension range of motion (ROM) following an initial
stretching programme. A test-retest randomised control trial was undertaken. Sixty-three healthy male participants were randomly
assigned to two stretch groups and a control group. Active knee extension (AKE) stretches were performed five days a week for an
initial six weeks. Stretch group 1 then reduced the frequency of stretching to three days per week, and stretch group 2, to one day
per week, for a further six weeks. The control group did not stretch.