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NTIS 바로가기한국운동역학회지 = Korean journal of sport biomechanics, v.25 no.3, 2015년, pp.323 - 333
김성민 (국민대학교 일반대학원 체육학과) , 김혜리 (국민대학교 일반대학원 체육학과) , (국민대학교 일반대학원 체육학과) , 신성훈 (영남대학교 체육학부 체육학전공) , 공세진 (한국과학기술연구원) , 김언호 (한국스포츠개발원) , 이기광 (국민대학교 체육대학 스포츠건강재활전공)
Objective : The purpose of this study was to investigate the changes of gait patterns and muscle activations with increased loads during stair walking. Also, it can be used as descriptive data about continuous stair walking in a real life setting. Method : Twelve sedentary young male adults(Age: 주제어
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핵심어 | 질문 | 논문에서 추출한 답변 |
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계단 보행은 어떤 동작인가? | 일상생활에서 가장 많이 일어나는 동작은 평지 보행이며, 평지 보행 다음으로 많이 일어나는 동작 중 하나가 바로 계단 보행이다(Yoon, 2008; Roys, 2001). 평지 보행과 달리 계단 보행은 전방으로 이동하면서 동시에 신체가 수직 방향으로 이동 하는 동작으로, 발 뒤꿈치가 아닌 발가락이 지면에 먼저 접촉하여 다른 형태의 지속적인 굴곡과 신전이 일어난다(McFadyen & Winter, 1988; Riener, Rabuffetti, & Frigo, 2002). 그로 인해 하지에서 에너지, 근 활성도, 관절의 운동학적 및 운동역학적 요소를 더 크게 요구하여 계단 보행 시 부상의 위험이 커져 안전사고가 발생할 가능성이 증가한다(Qu & Hu, 2014). | |
계단 보행에서 반복적인 부하로 인해 피로가 발생 시 어떤 문제점이 발생할 수 있는가? | 피로는 과도한 활동으로 인해 필요한 힘 혹은 예상되는 힘을 유지하는 능력이 실패했을 때로 정의한다(Edwards, 1984; Gefen, Megido-Ravid, Itzchak, & Arcan, 2002). 이러한 피로는 자신의 동작 수행 능력뿐만 아니라, 다른 기능들에게까지 영향을 준다(Mizrahi, 2015; Mizrahi, Voloshin, Russek, Verbitsky, & Isakov, 1997). Yoshino, Motoshige, Araki과 Matsuoka(2004)은 사람들은 피로 상태에 따라 선호하는 보행 패턴을 결정한다고 보고하였고, Parijat과 Lockhart(2008)는 무릎 신근의 피로는 무릎의 위치에 대한 감각 능력을 감소시키며, 보행 시 무릎에서 다른 움직임이 일어나 보행 패턴에 많은 영향을 미친다고 보고하였다. 또한 체중을 양발에 분배하는 기능이 서서히 감소하여 불안정성이 나타나 더 심한 피로를 유발할 수 있고, 이는 뼈에서 구부러지는 탄성을 감소시므로 최대 동적 부하를 반복적으로 가해 근골격계 조직을 손상시킬 수 있다(Chaloupka, Kang, Mastrangelo, & Donnelly, 1997; Pandy & Andriacchi, 2010; Radin & Rose, 1986; moon, 2004). | |
계단을 올라가는 동작은 평지보행과 어떤 다른점이 있는가? | 계단을 올라가는 동작에서 Andriacchi, Andersson, Fermier, Stern과 Galante(1980), Protopapadaki, Drechsler, Cramp, Coutts과 Scott(2007)은 하지 관절에서 굴곡, 신전에 대한 높은 운동 가동범위와 모멘트가 평지 보행에 비해 크게 나타나 계단 보행 시 더 많은 근력과 힘이 필요하다고 보고하였고, McFadyen와 Winter(1988)는 지지기 초반에는 힘의 크기가 적게 나타나 지지기 후반에는 신체를 끌어올리기 위해 순간적으로 힘과 속도가 증가하게 되어 계단 올라가기 시 주의할 필요가 있다고 보고하였다. 계단을 내려가는 동작은 올라가기에 비해 더 많은 위험성이 나타난다(Cluff & Robertson, 2011; Startzell, Owens, Mulfinger, & Cavanagh, 2000; Templer, Archea, & Cohen, 1985). |
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