Background: There are insufficient objective or quantitative evidence for the better intervention to improve proprioception particularly for the application of external load. There are conflicting opinions whether the external load is effective for proprioception improvement or not. Objects: The purpose of this study was to investigate effects of external load on proprioception of shoulder joint quantitatively using 3D motion capture system. Methods: Nine healthy adults joined for this study. They were asked to perform scapular plane abduction motion with attaching reflective markers on the trunk and upper limb. The 3D positions of finger marker, while they performed the same task with and without external load, were recorded and analyzed. Results: All participants showed decreased variable errors in the vertical direction when the external load was applied (p<.02). Even though other directions (y, z) and absolute errors increased, they did not have statistical significances. Conclusion: Based on this study results, the external load application would be effective for shoulder joint position sense improvement.

Abstract
 Ⅰ. 서론
 Ⅱ. 연구방법
  1. 연구대상자
  2. 측정 장비 및 기기
  3. 실험 방법
  4. 분석 방법
 Ⅲ. 결과
 Ⅳ. 고찰
 Ⅴ. 결론
 References

• 황지선(호서대학교 일반대학원 물리치료학과) | Jisun Hwang
• 황선홍(호서대학교 생명보건대학 물리치료학과, 호서대학교 기초과학연구소) | Seonhong Hwang Corresponding author