Normal time
5-6 years old
Premature harm: The baby's bones are in the development stage, their plasticity is very strong, and their muscle strength is very weak. When riding a buggy, the lower limb costs a lot of energy. If the leg is in a state of muscular tension for a long time, and the skeleton of the lower extremity is subjected to stress for a long time, the growth and development of the skeleton is very unfavorable. Children's tricycles currently on the market have a wider distance between the two pedals, and the distance between the seats and the pedals is too long. Some vehicles cannot adjust this distance.
In this way, when the child is riding up, the feet and lower limbs are very hard. Over time, the inside of both knees becomes inflated and the two lower limbs expand outwards to form an "X"-shaped leg. Some children even form an internal affixed foot.
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