The ability of the stretching protocol to increase the angle of
knee extension 6.80 (at 1 minute) was slightly less than the 8.00
and 9.20 reported by Worrell et al,24 and Sullivan et al,21
respectively. However, our study reported similar results with
fewer stretches. All 3 studies incorporated a prebaseline
warm-up, used the AKE test to measure knee joint range of
motion, and had subjects perform a static stretching protocol in
an upright position. The differences in the angle of knee
extension at 1 minute recorded by Worrell et al24 and Sullivan
et a121 may be the result of the number of stretches: 48 total
stretches (15 stretching sessions performed over a 3-week