PNF and Movement 2024; 22(2): 315-324
https://doi.org/10.21598/JKPNFA.2024.22.2.315
Activation and Ratio of Shoulder Stabilizer Muscles on Variations of Manual Resistance during Three Dimensional Shoulder Rehabilitation Exercises
Min-Hyeok Son, P.T., B.S.1⋅Hyun-Been Roh, P.T., M.S.1⋅Du-Jin Park, P.T., Ph.D.2†
1Department of Physical Therapy, Graduate School, Catholic University of Pusan
2Department of Physical Therapy, College of Health Sciences, Catholic University of Pusan
Correspondence to: †Du-Jin Park (djpark35@cup.ac.kr)
Received: August 6, 2024; Revised: August 14, 2024; Accepted: August 16, 2024; Published online: August 31, 2024.
© Korea Proprioceptive Neuromuscular Facilitation Association. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Purpose: The aim of this study was to compare the activation of shoulder stabilizer muscles to variations of manual resistance during three-dimensional shoulder rehabilitation exercises.
Methods: A total of 13 participants were included in this study. To normalize each muscle’s activity, a maximal isometric voluntary contraction was performed by all participants. After receiving 30 minutes of training in three-dimensional shoulder rehabilitation exercises, participants randomly performed PNF arm and scapular patterns according to the intensities of manual resistance. The activities of the upper trapezius, lower trapezius, and serratus anterior were measured during these patterns. All exercises were performed for five seconds, and the average of three seconds, excluding the first and last seconds, was used for data analysis.
Results: Lower trapezius activity was significant among manual resistance intensities. In both the PNF arm and scapular patterns, using 80% manual resistance of maximum resistance showed higher activity of the lower trapezius muscle compared to 20% of the maximum resistance.
Conclusion: It is expected that PNF arm and scapular patterns, with varying intensities of manual resistance, can be used for early rehabilitation of patients with shoulder impingement syndrome.
Keywords: Muscle Stretching Exercises, Shoulder Joint, Trapezius, Manual resistance

This Article


Services
Social Network Service

e-submission

Search for

Archives