PURPOSE: 본 연구의 목적은 둥근어깨자세(round shoulder posture)와 전방머리자세 (forward head posture)에 따라 폐활량 측정과 산소포화도 및 횡격막 움직임 크기의 상관관계를 알아보는 것이다. METHODS: 연구의 대상은 만성 심장질환 및 호흡기 질환을 가지고 있거나, 정신적, 인지적 장애가 있는 자, 척추옆굽음증(scoliosis)이 있는 자, 목과 갈비뼈 손상이나 수술 병력이 없는 50명의 자원한 사람으로 선정되었습니다. 통계분석은 피어슨(Pearson)의 상관분석을 실시한다.
RESULTS:둥근어깨자세는 FVC,FEV1,FEV1/FVC%,PEF 에 대해 양의 상관계수를 보이고 이중 PEF가 가장 상관성이 높았다(p<.05). 횡격막 움직임의 크기(DMD)에 대해서도 양의 상관계수를 보였다. 그러나 TAD(table acromion distance)와는 음의 상관관계를, SPO2는 PM/C7~acro, TAD(table acromion distance) 둘다 음의 상관관계가 나타났다(P>.05). 전방머리자세는 CVA와 CRA 모두 FVC,FEV1,FEV1/FVC, PEF 비율에 대해 유의한 상관관계가 없다(p>.05). CRA와 DMD에는 유의한 차이가 있는 음의 상관관계가 나타났지만(p<.05), CVA와 DMD에는 유의한 상관관계가 발견되지 않았다. 또한 CVA와 CRA 모두 SPO2에 대해 유의한 상관관계가 없다(p>.05).
CONLUSION: 결론적으로 전방머리자세의 각도와 둥근어깨 자세에 따라 폐활량과 횡격막 움직임에 영향을 미친다는 것을 확인 할 수 있었다. 하지만 좀더 많은 인원과 대상자들의 경직된 자세에 대해 제한할 방법을 추가적으로 찾을 필요가 있다.

PURPOSE: The purpose of this study was to analyze the correlation between vital capacity, oxygen saturation and diaphragm movement distance according to round shoulder and forward head posture of adults in their 20s.
METHODS: The study selected 50 volunteers who did not have chronic heart disease and respiratory disease, had no mental, cognitive impairment, scoliosis, history of neck and rib damage or surgery. Subjects' round shoulder posture and forward head posture were measured, and their respiratory function was measured using a spirometer, finger pulse oximeter, and ultrasonography. Pearson's correlation analysis was used for statistical analysis.
RESULTS: PML/C7-A had no significant correlation with FVC, FEV1, and FEV1/FVC%, but had a significant correlation with PEF (p<.05). There was no significant correlation with the diaphragm movement distance. Second, there was a negative correlation between CRA and diaphragm movement distance in forward head posture (p<.05), but there was no significant correlation between CVA and diaphragm movement distance. Third, neither CRA nor CVA had a significant correlation for FVC, FEV1, FEV1/FVC%, and PEF (p>.05).
CONLUSION: These results suggest that the angle of the forward head posture and round shoulder posture affect the vital capacity and diaphragm movement. However, this study requires more participants, and it is necessary to find additional ways to limit the rigid posture of the subjects.

요약
Abstract
Introduction
Study method
    1. Participants
    2. Measurement Equipment
    2. Measuring round shoulder (Table-to-acromion distance & Pectoralisminor length / C7-to-acromion distance)
    3. Measuring forward head (CVA & CRA)
    4. Measuring lung capacity (spirometer) & SPO2 using a fingertip pulseoximeter
    5. Measuring diaphragm movement distance (ultrasound-estimated)
    6. Experiment procedures
    7. Data Analysis
Result
    1. Round shoulder
    2. Forward head
Discussion
Conclusion
References

• 오승민(선문대학교 물리치료학과) | Seung-min Oh (Department of Physical Therapy, College of Health Science, Sunmoon University, Asan, Republic of Korea)
• 이지영(선문대학교 물리치료학과) | Ji-young Lee (Department of Physical Therapy, College of Health Science, Sunmoon University, Asan, Republic of Korea)
• 김서연(선문대학교 물리치료학과) | Seo-yeon Kim (Department of Physical Therapy, College of Health Science, Sunmoon University, Asan, Republic of Korea)
• 이동엽(선문대학교 물리치료학과) | Dongyeop Lee (Department of Physical Therapy, College of Health Science, Sunmoon University, Asan, Republic of Korea)
• 홍지헌(선문대학교 물리치료학과) | Ji-Heon Hong (Department of Physical Therapy, College of Health Science, Sunmoon University, Asan, Republic of Korea)
• 유재호(선문대학교 물리치료학과) | Jae-Ho Yu (Department of Physical Therapy, College of Health Science, Sunmoon University, Asan, Republic of Korea)
• 김진섭(선문대학교 물리치료학과) | Jin-Seop Kim (Department of Physical Therapy, College of Health Science, Sunmoon University, Asan, Republic of Korea)
• 김성길(선문대학교 물리치료학과) | Seong-gil Kim (Department of Physical Therapy, College of Health Science, Sunmoon University, Asan, Republic of Korea) Corresponding author