[Purpose] This study examined the relationship between toe grip strength and its
associated factors by focusing on factors that were suggested to have a relationship with
toe grip strength in previous studies, aiming to clarify the factors influencing the toe
grip strength of healthy women. [Subjects and Methods] Twelve healthy young women were
selected for this study. Their toe grip strength, angular changes in their ankle joint
during toe grip, maximum voluntary contraction activities of the rectus femoris, biceps
femoris, and tibialis anterior muscles, and the medial head of the gastrocnemius muscles
were measured using electromyography. Their toe curl ability, foot-arch height ratio, and
weight were also measured. [Results] Multiple regression analysis demonstrated that the
predictors of toe grip strength in the resulting model were foot-arch height ratio and the
percentage of integrated electromyography (%IEMG) of the tibialis anterior muscle, as the
dependent variables. This reveals that women whose tibialis anterior muscle %IEMG values
and foot-arch height ratio are high have greater %IEMG values have greater toe grip
strength. [Conclusion] These findings suggest a significant relationship between foot-arch
height ratio and toe grip strength, with a reciprocal interaction. These findings further
indicate that the risk of falls by the elderly could be decreased if toe grip strength
were enhanced, by increasing the height of a low foot-arch with the help of an inserted
insole.