Wear carry on the back better can not only correct for habit cause bow-backed, still can prevent myopia, alleviate limb fatigue, several common problems to solve, what is there against it?

I don't think I'm going out on a limb in saying that the one thing we all have in common is that we want a better world next year than this.

Limb numbness: common fingers and toes, such as numbness or skin ants line sense of the fingers are not flexible.