The Stretch Zone Effect

Background/Aim: Musculoskeletal care has experienced an increase in the use of practitioner-assisted stretching over the past decade. However, its durability and effectiveness have only been quantified in very few studies. In this current study, the clinical effectiveness of the Stretch Zone Method, perceived health, and the standardized method of practitioner-assisted stretching are evaluated. Methods: A three-phased prospective cohort study assigned 32 participants to four conditions over 4 weeks. Three conditions received practitioner-assisted stretching at varying frequencies and durations, and one condition served as a no-stretching control. Thirty-five range-of-motion (ROM) measures were taken through a goniometric test at baseline, post-program, and 30-day follow-up. The SF-36 instrument was used to assess the health status of participants. Results: MCID was surpassed by post-intervention changes in 33 of 35 ROM measurements. The lumbar flexion was increased by 8°, hip flexion by 10°, and trunk lateral flexion by 5°. The participants in the highest dosage arm (twice weekly, 60 minutes) attained 25% higher gains in ROM in comparison with the lower dosage groups. Eighty-one percent of initial gains were retained (27 ROM metrics), which was a significant improvement at 30-day follow-up. Seven of eight domains also exhibited a significant improvement in SF-36 scores. Conclusions: The Stretch Zone protocol provides dose-responsive, clinically meaningful increases in flexibility, as well as health perception. Whereas reduction was partial at 30 days, most benefits were maintained with high-frequency dosing. The results encourage the inclusion of the applied through guided stretching in a mobility rehabilitation therapy program.