[Purpose] This study aimed to compare the inter- and intra-examiner reliabilities of toe grip strength measurements obtained just above the first interphalangeal joint with those of toe grip strength measurements obtained in the most comfortable position for the participant. The study also aimed to calculate the minimal detectable change for the more reliable method. [Participants and Methods] The participants for each test included 20 healthy adult males and females. Intra-class correlation coefficient (1,1) and (2,1) values were calculated for both tests. Bland–Altman analysis was used to determine the systematic error and calculate the minimal detectable change. [Results] The intra- and inter-examiner reliabilities of measurements obtained by setting the position of the toe-grasping bar to the first interphalangeal joint were better than those obtained in the most comfortable position for the participant. Measurement of the minimal detectable change showed a random error of 4.97 kg. [Conclusion] We considered that toe grip strength measurements just above the first interphalangeal joint were better. The minimal detectable change was 4.97 in healthy adults.

The purpose of this study was to clarify whether there is a difference between operative and non-operative side toe grip strength of patients with femoral neck fractures, and to examine the reliability and the minimum detectable change (MDC) in toe grip strength measurements. [Participants and Methods] Twenty patients with femoral neck fractures had their toe grip strength measured, and the results were analyzed. [Results] There was no significant difference between the operative and non-operative side toe grip strength. Bland Altman analysis revealed no systematic error. The MDC was 2.1 kg on the operative side and 1.3 kg on the non-operative side.[Conclusion] If the change in toe grip strength of patients after femoral neck fracture surgery is less than 2.1 kg on the operative side and 1.3 kg on the non-operative side, it may be due to a measurement error.

[Purpose] Femoral neck fractures are a common problem resulting from balance impairment. Toe grip strength is related to balance function. This study aimed to confirm the type of balance function that is highly related to toe grip strength. [Participants and Methods] The participants included 15 patients who were examined for differences in toe grip strength between the affected and nonaffected side. The relationship between toe grip strength and functional balance scale (FBS) and index of postural stability (IPS) was analyzed. [Results] The result showed no significant difference between the nonaffected and affected sides. A correlation exists between toe grip strength and FBS and IPS. In addition, the data from the center-of-gravity sway meter showed a correlation only between the toe grip strength and anteroposterior diameter of the stable area but not between the right and left diameters of the stable area and anterior and posterior trajectory lengths. [Conclusion] No significant difference was found between the affected and nonaffected sides. The results suggest that toe grip strength is related to the ability to move the center of gravity forward and backward rather than to sustain the center of gravity.