PNF and Movement 2023; 21(3): 319-326
The Effects of Modified PNF Ankle Movement Patterns on Active Dorsiflexion Range of Motion and Leg Muscle Activity
In-Gyun Kim, P.T., M.S.1⋅Su-hong Choi, P.T., Ph.D.2⋅Sang-Yeol Lee, P.T., Ph.D.3†
1Seoul Sky Rehabilitation Hospital
2Department of Rehabilitation Medicine, Busan National University Hospital
3Department of Physical Therapy, Kyungsung University
Correspondence to: Sang-yeol Lee (
Received: October 18, 2023; Revised: November 7, 2023; Accepted: November 13, 2023; Published online: December 31, 2023.
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Purpose: The purpose of this study was to investigate the effects of modified ankle movement patterns on participants’ active dorsiflexion range of motion and leg muscle activity.
Methods: This study recruited twenty-five participants, all of whom were healthy individuals with no abnormalities in the ankle or knee joints. The research methodology involved measuring the active dorsiflexion range of motion and muscle activity in each person’s legs based on the presence or absence of toe extension while the subjects were in a comfortable, supine position. A statistical analysis was conducted using SPSS 25.0, and a paired samples t-test was employed. The significance level was set at 0.05.
Results: When the participants demonstrated the modified ankle movement pattern with a controlled toe grip, there was an increase in their active dorsiflexion angle. However, during the proprioceptive neuromuscular facilitation technique without a controlled toe grip, a higher level of activity was observed in the leg muscles.
Conclusion: The results of this study could be used as foundational data for establishing a rehabilitation exercise program designed to enhance range of motion and muscle activation in the ankle joint.
Keywords: Dorsiflexion, Range of motion, Muscle activity, PNF

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