Background: Proprioceptive neuromuscular facilitation (PNF) has been proven effective in a myriad of clinical fields as a treatment to restore function in patients with musculoskeletal disorders, damage to the central nervous system, or sports injuries. Objectives: The purpose of this study was to investigate the effect of a 2-week PNF exercise intervention on the degree of calcification, pain perception, and shoulder joint function in persons with calcific tendinitis (CT) of the supraspinatus. Design: Matched pairs design. Methods: This study was classified into a PNF group (n=8) and a control group (n=7) through a matched pairs design. Filmed x-rays, Visual Analogue Scale (VAS), Simple Shoulder Test (SST), and Constant-Murley Scale (CMS) were used to assess the long and short axis of calcified deposits, self-awareness of pain, and shoulder joint function of the subjects. 8 participants in the PNF group received a scapular and upper extremity PNF exercise intervention for 30 minutes per session, 10 times/week for 2 weeks while no intervention in the control group. Results: Two-way repeated analysis of variance (ANOVA) showed a significant improvement after the 2-week PNF exercise intervention on calcified deposits, pain, and shoulder joint function (P<.05), whereas no changes in the control. Conclusion: These findings suggest that the intensive 2-week PNF exercise may maximize intervention effects to reduce calcified deposits and pain in a relatively short period time and is effective for restoring shoulder function without combining other treatments or exercises in patients with supraspinatus CT.

INTRODUCTION
SUBJECTS AND METHODS
    Subjects
    Intervention
    Assessment
    Data Analysis
RESULTS
    General characteristics of the patients
    Long axis of calcific deposit (Ca-L) and short axis ofcalcific deposit (Ca-S)
    Visual analogue scale (VAS)
    Simple shoulder test (SST)
    Constant-murley scale (CMS)
DISCUSSION
CONCLUSION
ACKNOWLEDGE

• Donggun Oh, PT, PhD(Department of Physical Therapy, Dongnam Health University, Suwon, Republic of Korea)
• Beomcheol Jeong, PT, PhD(SG Samsung Joeun Hospital, Cheonan, Republic of Korea)
• Soonjee Park, PhD(Department of Clothing and Fashion, Yeungnam University, Kyungsan, Republic of Korea) Corresponding author