This idea is very one-sided. Backpack can really play the role of bearing weight in aerobic exercise such as shopping. On the surface, aerobic exercise with weight increases energy consumption and is beneficial to lose weight. However, carrying an overweight backpack when shopping is very harmful to your health and does more harm than good.

If the backpack is too big or too heavy, it will increase the burden on the shoulders and it will easily slide down. People should consciously lift their heavy shoulders to keep their balance. In particular, most women like to carry a big bag on one shoulder. Long-term single shoulder weight will lead to uneven stress on the back muscles, which is easy to cause strain on the spine and waist. Therefore, women who like to carry a large shoulder bag often feel pain in their neck, shoulders and back, and what's more, their bodies are deformed, leading to awkward "high and low shoulders".

And if you choose a backpack with two shoulders, the damage to your body will not be so obvious. Because the two shoulders are balanced, there is no need to deliberately raise one shoulder to maintain balance, so there is no problem caused by the above-mentioned shoulder bag. In addition, carrying a load on the back can make the chest open to the maximum extent, that is, "hold your head up and hold your chest high", which is a kind of protection for the spine. Therefore, it is recommended that women use more shoulder bags, which are slightly heavier and harmless.

If women must use a shoulder bag, they need to "reduce the burden". When you are away from home, the simpler you take, the better. It is advisable not to feel the pressure on your shoulders. There are also some girls who like to hang many trinkets on their schoolbags, some of which are metal, which undoubtedly increases the weight of the schoolbags. So it is suggested to hang some light plush toys or nothing.

Besides, there is a better way. If the bag is heavy, you can choose to carry it and change hands frequently. Pressing the median nerve and blood vessels of the forearm with one hand for too long will lead to poor blood supply to the forearm and pain and numbness in the arm. Although the arm will be sore, the discomfort will disappear as long as you change hands in time.

In particular, some bags are too thin and hard, such as a metal chain, which is fashionable, but it is easy to hurt the trapezius muscle of the shoulder. Especially for shoulder bags, choose those styles with wide and soft belts when buying, and try to reduce the pressure of heavy objects on shoulders.