Abstract:

BACKGROUND: Toe-out feet destroys the distribution of normal power in knee joint, then increases the biological stress on one side and reduces on the other.
OBJECTIVE: To further understand the characteristics of plantar pressure in toe-out foot.
METHODS: Footscan plantar pressure test system (Belgium) was used to detect pole pressure of young males aged 20-25 years, selected from Shijiazhuang. A total of 39 had normal foot as normal group, and 39 toe-out foot as abnormal group.
RESULTS AND CONCLUSION: The peak torque of foot in Meta3 on left side in abnormal group was higher than normal group  (P < 0.01), while the peak torque in Meta5 and arch was lower than normal group (P< 0.05). There were significant differences in impulse in Meta1 and Meta5 of normal group (P < 0.05); while in abnormal group, highly significant differences were observed in Meta2 and Meta4 (P < 0.01, P < 0.05). Between two groups, disparity presented in toe 3 of the left foot (P < 0.05) and in heel medial, heel lateral regions (P < 0.01), respectively. In the right foot, there were highly significant differences in heel medial (P < 0.01). Toe-out foot result in the slant power rather than straight direction, so the strength in walking direction is small. During walking, stress sequence is not along the arcus pedis longitudinalis, so the foot arch cannot reduce the shock power but increase the impulse and risk of injury. People with toe-out foot should pay attention to the relation of function time and foot pole pressure, which can increase the contact time with the ground to reduce impact value and avoid sports injury.