Abstract
The purpose of this study was to sample the factors influencing foot-gripping force by measuring the height, weight, muscle strength of legs, and the shape and flexibility of the toes and feet of 53 healthy women and then to project the foot-gripping force based on these factors. Foot flexibility, arch height of the foot, and body weight were sampled as the factors influencing foot-gripping force. These three variables provided a projection formula of foot-gripping force: foot-gripping force = -6.265 + 0.795 ´ foot flexibility + 0.320 ´ arch height of the foot + 0.111 ´ weight. The multiple correlation coefficient of this regression formula is 0.78 (p<0.0001), which shows significance in terms of the goodness-of-fit for projecting the foot-gripping force. Moreover, the correlation coefficient between the projected value of the foot-gripping force obtained by the projection formula and the actual value for an additional 26 healthy women who were tested was 0.82 (p<0.0001), which indicates the validity of using the three explanatory variables for projecting foot-gripping force: foot flexibility, arch height of the foot, and weight.
