Purpose - Due to the lack of physical activities and the increase of sedentary behaviors such as screen time, the health condition for contemporaries has been deteriorating. This study is designed to investigate how the use of worktable or tools unfit for body and sedentary behaviors can exercise influence on muscular skeletal disease and how it has an impact on lowering work efficiency and the quality of life with the medium of the muscular skeletal disease. Research design, data, and methodology - The research has developed a questionnaire with 5 hypothesis. The questionnaires were also made by interview and E-mail. 350 copies of questionnaires were distributed and 315 questionnaire were used for the analysis as valid data responses. SPSS ver.22.0 were used and made Cronbach's and reliability test, correlation, Baron & α Kenny 3 step mediated regression analysis. Results - The research has found that living environment factors have positive effect on the occurrence of musculosketal disease. Particularly, repeated use of unfit worktable or tools has a positive effect on the muscular skeletal disorder. And sedentary lifestyle also has a positive effect on the disease. The musculoskeletal disease caused by living environment has a positive impact on lowering the work efficiency. This study has also showed that the muscular skeletal disease has mediated the relationship between the living environment factors and the decrease of work efficiency due to musculoskeletal disease. The musculoskeletal disorders can effect the decrease of the quality of life as well, for the decrease of work efficiency has a positive effect on lowering the quality of life. Conclusions - Sedentary lifestyles, the use of worktable unfit for body, and the repeated use of a tool have caused the increase of muscular-skeletal diseases, and reduction of productivity as well as the hight cost of medical treatment for our contemporaries. Understanding the cause of disease morbidity, finding ways to prevent the disease, and educating people about them would contribute not only to improvement of individual health but also to the advancement of welfare for all.

Abstract
 1. 서론
 2. 이론적 배경
  2.1. 근골격계 질환의 정의와 발병원인
  2.2. 작업환경과 근골격계 질환발병 상관관계
  2.3. 좌식생활
  2.4. 업무능률 저하
  2.5. 삶의 질 저하
 3. 실증연구 설계
  3.1. 연구모형 및 가설
  3.2. 표본설계 및 분석방법
  3.3. 변수의 측정
 4. 연구결과
  4.1. 인구통계학적 특성
  4.2. 신뢰도와 타당도
  4.3. 상관관계분석
  4.4. 가설검증결과
 5. 결론 및 시사점
  5.1. 연구의 요약 및 시사점
  5.2. 연구의 한계점 및 향후 연구방향
 References

• Jong-Ho Park(Department of Retail Management, Kong-ju National University, Kong-ju, Korea.) | 박종호
• Eun-Jeong Kim(Professor, Department of Social Welfare, Jungwon University, Korea.) | 김은정 Corresponding Author