1. Reduce shaking
Whether it is a backpack or a messenger bag, the shoulder strap should not be too long, otherwise it will easily cause excessive shaking. The proper length of the shoulder strap helps stabilize the center of gravity, so that the muscles of the body will not be constantly adjusted for the constantly changing center of gravity, and eventually be damaged due to "overwork".
2. The backpack position cannot be too low
If you want a comfortable backpack, the bag cannot be carried too low. For example, the lower edge of the backpack is best in the pelvic position. The messenger bag is best placed on the waist side, and the upper edge of the backpack is approximately at the position of the pelvis.
3. It's best not to carry your back in front of you
Whether it is a messenger bag or a backpack, it is best not to carry it on your back from a health point of view. Because of the force, the body will lean forward when the back is in front of the body, which is easy to cause a "hunchback".
4. Change shoulders regularly
Everyone has their own favorite habit of backpacks. Experts advise that if you use a shoulder bag or a messenger bag, you must change your shoulders regularly, which can prevent cervical and spine strain.