Change in body use when sitting looking backwards from between the legs.

2023 Fiscal Year Final Research Report

• Project/Area Number: 19K19530
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 58050:Fundamental of nursing-related
• Research Institution: Gunma Prefectural College of Health Sciences
• Principal Investigator: Sato Masaki 群馬県立県民健康科学大学, 看護学部, 講師 (30570163)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Keywords: 注視動作 / 着座動作 / 表面筋電図 / 動作分析

Outline of Final Research Achievements

The purpose of this study is to clarify how the different gazing locations during the seating movement cause changes in the muscle activity of the lower limbs and the body use of the upper body, limbs and joints. Subjects were 16 healthy adults. The subjects were asked to sit while looking at (1) the front, (2) the feet, (3) the front edge of the seat, and (4) the back edge of the seat. (3) and (4) were asked to sit so that they could look in between both legs. At that time, surface EMG was also measured in the rectus femoris, gastrocnemius, and tibialis anterior muscles. In the 3D motion analysis, the angle of forward tilt of the upper body, angle of forward tilt of the lower leg, left greater trochanter-to-ankle joint distance in the mid-sagittal plane, cephalic-to-left ankle joint distance, and center of gravity height were calculated. Lower extremity burden and stability were also investigated. Measured values were compared between methods.

Free Research Field

基礎看護学

Academic Significance and Societal Importance of the Research Achievements

本研究で得られた知見では，正面を向いたまま着座するよりも両下肢の間から座面の前方や後方30cmをのぞき込みながら着座することで大腿直筋及び前頸骨筋の筋活動量が低値となる．ある程度筋力が低下した方にも活用できると思われ，残存機能を活用した援助が可能となり被介助者自身も自立した動作をできるという点で自尊心の維持にもつながるものと思われる．介助法では被介助者の横に立ち脇や腰を支えるという動作であるため，従来の正面から抱き合う方法よりも腰部負担も軽減できると思われる．座面後方30cmを覗き込みながらの着座動作では深く腰掛けることができ，洋式便器のように深く座ることが必要とされる場面において活用できる．