edit
First, congenital genetic factors. One of the parents is an inner character or an outer character, and the child born is probably one of them.
Second, the strength of the legs and ankles is insufficient. This phenomenon is especially obvious in sprint. In order to run fast, some students pushed back desperately and turned their feet inward or outward involuntarily.
Third, I didn't master the correct posture of running or walking.
Fourth, the influence of living environment.
Fifth, students who have participated in basic dance training also have splayed feet.
Sixth, the reasons for the formation of splayed feet should also be discussed when children begin to learn to walk. Some mothers measure their babies' intelligence by the time they can walk, so they are anxious to let them learn to walk. Because the baby's body is in the development stage, the feet are not strong enough. When walking and standing, the feet will naturally separate, so that the sole area will be widened to increase the strength to prevent falling, resulting in the posture of naturally separating the feet.
Seven, it is unscientific to let the baby wear hard shoes during the toddler period. Because children's foot bones are soft, ankle strength is weak, and leather shoes are hard and heavy, the baby has a feeling of "immobility" to shoes, which distorts the gait over time. Remind mothers that wearing cloth shoes is the best choice when they are toddlers.
Eight, due to the lack of calcium in the baby's body, the low calcium content in the bone itself, coupled with the pressure on the bone when walking and standing, it is easy to make the bilateral iliac joints appear outward, forming an "external figure" foot. Therefore, mothers should be careful not to let the calcium-deficient baby learn to walk too early, and provide their children with enough food rich in protein, calcium and vitamin D in time. Going outdoors to bask in the sun helps to absorb calcium and prevent rickets.
Nine, football players, due to long-term serious wear and tear of knee joints and ankles, are also an important reason for their external character.
X. other external causes.