The frequency of this physical discomfort increases with age and is related to factors such as sedentarianism, lack of adequate muscle and excessive weight of school backpacks
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The frequency of this physical discomfort increases with age and is related to factors such as sedentarianism, lack of adequate muscle and excessive weight of school backpacks

The frequency of this physical discomfort increases with age and is related to factors such as sedentarianism, lack of adequate muscle and excessive weight of school backpacks