PNF and Movement 2021; 19(3): 303-310
Effects of the Contact-Relax (CR) Intervention on Pelvic Alignment in Subjects with Habitual Poor Posture
Jwa-Jun Kim, P.T., Ph.D.⋅Je-Chan Ryu1⋅Hyeon-Seung Lee1⋅Min-Ji Kim1⋅Se-Rim Lee1⋅Hye-Won Lee1⋅Sol Im1⋅Se-Yeon Park, P.T., Ph.D.2†
Department of Physical Therapy, Choonhae College of Health Sciences
1Department of Physical Therapy, Kaya University
2Department of Physical Therapy, Uiduk University
Correspondence to: Se-Yeon Park (
Received: September 7, 2021; Revised: October 10, 2021; Accepted: October 13, 2021; Published online: December 31, 2021.
© Korea Proprioceptive Neuromuscular Facilitation Association. All rights reserved.

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Purpose: The purpose of the present study was to investigate the effects of the contact-relax (CR) intervention on pelvic alignment in subjects with habitual poor posture.
Methods: Fifteen subjects who have habitual poor posture participated in this study. The subjects received an intervention inducing pelvic posterior depression with the elevated pelvic side. Pre- and post-intervention, and two weeks after intervention, the pelvic alignment was measured with a palpation meter (PALM) and a three-dimensional diagnostic imaging system.
Results: Measuring with PALM, the pelvic height and anterior tilt angle were significantly decreased immediately after and were still decreased two weeks after intervention, compared to the pre-measurement (p<0.05). Three-dimensional pelvic alignment was also significantly different between measurement points, while the pelvic position (pelvic lateral tilt) was significantly decreased after intervention (p<0.05).
Conclusion: By applying the intervention generating CR on an elevated pelvis, frontal pelvic alignment can be improved.
Keywords: Pelvic measurement, PALM, Rasterstereography

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