Effect of remote myofascial release on hamstring flexibility in asymptomatic individuals - A randomized clinical trial

Background: The existence of continuity between fascia and muscles that may be anatomically distant from each other is emphasized in the tensegrity principle. Despite evidence from in vitro studies, there is a dearth of literature concerning the in vivo behavior of these connections. Aim: To compare the effect of Static Stretching (SS) of hamstrings with remote Myofascial Release (MFR) (bilateral plantar fascia and suboccipital region) and a combination of SS and remote MFR on hamstring flexibility. The secondary aim of this study was to investigate the difference between therapist administered and self-administered interventions. Design: Three arm assessor-blinded Randomized Clinical Trial (RCT). Participants: Fifty-eight asymptomatic participants (16 Males; Mean age 22.69 +/- 2.65 years). Method: Participants with tight hamstrings defined by a passive Knee Extension Angle (KEA) > 20 degrees were included in the study and were assigned to one of the three groups. Group A (n = 19) was SS, group B (n = 20) was remote MFR, group C (n = 19) was a combination group who received both SS and remote MFR. Seven sessions of therapist administered intervention were delivered over a period of 10 days, which was followed by a 2-week self-administered home program. KEA and Sit and Reach Test (SRT) were used as outcomes and measurements were performed at baseline, end of the seventh session and after atwo-week follow-up. Results: The results demonstrated that hamstring flexibility improved in all three groups after therapist administered interventions (p <0.05), whereas, group C demonstrated additional benefits. None of the groups showed a statistically significant (p > 0.05) change in the KEA with self-intervention. Conclusion: The findings of this study indicated that all three interventions were effective in improving hamstring flexibility in young asymptomatic individuals when performed by the therapist. (C) 2018 Elsevier Ltd. All rights reserved.