School bag with a long, dragging on the bottom, many children feel this posture on the back of the school bag is both energy saving and comfortable. But in fact, such a backpack posture is very easy to hurt the spine!
Teenagers don't correct double shoulder backpack method, and the heavy backpacks are not conducive to growth and development, can the weaker adolescent spinal muscle development on both sides of the neuromuscular long-term is in nervous condition, which occurred after scoliosis, and lordosis, convex defects and forward position, cause back pain, muscle pain and other diseases.
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