Departmental Bulletin Paper ハンドヘルドダイナモメーターを用いた等尺性膝伸展筋力測定における骨盤固定が測定値に及ぼす影響
Impact of Pelvic Fixation on the Measurement of Knee Extensor Muscle Strength Using a Hand-held Dynamometer and Belt
Impact of Pelvic Fixation on the Measurement of Knee Extensor Muscle Strength Using a Hand-held Dynamometer and Belt

高木, 亮輔  ,  平野, 正広  ,  柊, 幸伸  ,  川崎, 翼  ,  加藤, 宗規

Description
【目的】ハンドヘルドダイナモメーター(HHD)を用いた等尺性膝伸展筋力測定において,骨盤固定が測定値に及ぼす影響を検討した.【方法】対象は健常若年成人21名とし,HHDにて,端座位膝屈曲90°での等尺性膝伸展筋力を測定した.測定肢位は体側の座面に手をつく方法(固定なし位),ベッド端を掴み臀部挙上を抑える方法(ベッド把持位),骨盤固定用ベルトで連結して臀部挙上を抑える方法(ベルト固定位)の3条件とした.条件間の比較および相関関係,絶対信頼性を検討した.【結果】ベッド把持位は他の2条件と比して有意差を認め,測定値が大きかった.相関係数は0.9以上だった.固定なし位とベッド把持位,ベッド把持位とベルト固定位において固定誤差を認めた.【考察】健常若年成人を対象としたHHDによる等尺性膝伸展筋力測定において,直接的な骨盤固定の影響は認められなかった.しかしながら,両手でベッド端などの座面の縁を把持して測定することで,従来の測定方法よりも測定における妥当性を有することが示唆された.
The purpose of the current study was to investigate the influence of pelvic fixation on isometric knee extension strength using a hand-held dynamometer (HHD). Twenty-one young adults participated (including six females) in this study. Isometric extension strengths with a 90° knee flexion angle were measured under three postural conditions; (a) no fixation (their arms along the sides of their body), (b) holding onto the bed (to prevent pelvis elevation by grasping the edge of a bed), and (c) pelvis fixation (to prevent pelvis elevation by connecting pelvis to the bed with a fixation belt). The strength values in the three conditions were analyzed using one way analysis of variance, correlation analyses, and absolute reliability. The result showed that the values in graspping bed condition were significantly higher than in the other evaluated situations. There were significant correlation between the three conditions, and the correlation coefficients were more than 0.9. In addition, fixed bias were obtained between no fixation condition and in the bed holding condition and between, bed holding situation and pelvis fixation situation. In conclusion, there were no direct effects of pelvis fixation on isometric knee extension strength. However, grasping the edge of a bed by both hands turned out to be more reliable than no fixation which was used previously.
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