Saying that one day, Xiao Bian and friends while shopping street to eat. At that time, did not buy anything, but feel the weight of the backpack, with a spring weighing a weight actually reached 3.5 kg, the bag on a cell phone, an umbrella, key, wallet, a pair of sunglasses, a book, A bottle of water, cosmetics, and a little paper towel. Honestly, Xiao Bian was shocked at that time, maybe you do not know, in fact, for a long time carrying more than 3 kg of the backpack, will affect the health.
The ability to bear the human is relatively poor, but the ant, but also than the horse. Generally speaking, for young people who are in the stage of growth and development, backpack weight can not exceed 10% of body weight; physical quality of adults or women in general, backpack weight can not exceed 15% of body weight; even if the physical quality of people, backpack Weight can not exceed 20% of body weight. Optional custom backpack, try to use the shoulder-style backpack, strap to be wider, the best choice waist and abdomen to help load the style.
You may be dissatisfied, that can bear more heavy, but time will tell you the answer, long time carrying heavy weight backpack, most people can not stand. If the backpack arm due to heavy backpack caused by damage, usually after physical therapy, exercise and other methods can be restored, but if the treatment, correction is not timely, it may cause spinal injury, back muscle asymmetry and other serious consequences, should pay attention The