本研究の目的は、足指把持力とバランス能力との関係性を検討することである. 対象は、健常な中高年女性13名(年齢59.8±4.3歳)と若年女性11名(年齢22.5±1.9歳)とした. 対象者には、足指把持力と立位での足圧中心(COP)の総軌跡長を測定した. COPの総軌跡長の測定は、条件の異なる2つの立位にて実施した. また、足指が床に接地した状態と接地していない状態とでFunctional Reach Test(FRT)を実施した. その結果、中高年女性と若年女性ともに、足指把持力と立位でのCOPの総軌跡長との間には相関関係が認められなかった. また、FRTの測定値は足指の接地の有無による影響が認められなかった. これらのことから、健常な中高年女性および若年女性において、足指把持力とバランス能力との明らかな関係性を示すことはできなかった.The objective of this study was to investigate the relationship between toe gripping force and balance ability. Subjects were 11 healthy young females (aged 22.5±1.9years) and 13 healthy upper-middle-aged females (aged 59.8±4.3years). Toe gripping force and the overall path length of the center of foot pressure (COP) while standing were measured. Measurement of the overall path length of COP was performed in two standing positions under two sets of conditions. In addition, the functional reach test (FRT) was administered with toes in contact with or not in contact with the floor. Results revealed no correlation between toe gripping force and overall COP path length while standing in both the upper-middle-aged group and the young group. In addition, no effect of contact or non-contact of the toes with the floor was noted in the measured FRT values. These findings showed no clear relationship between toe gripping force and balance ability in healthy young females or healthy upper-middle-aged females