bags that we carry in our backs, shoulders and called to hang our backpacks sitting backbone. known as a knapsack backpack. A backpack is two straps that go over the shoulders bear heavy burden, and a strap carry bag for easy loading. Backpacks are always handbags preferred because who shoulders instead of hands may be too much load, because the hand can hold and carry too much weight for a long time. But how much weight we carry it will depend on our body, how much can we depend on our backs. Now backpacks are available in many sizes, large backpacks can carry loads over 10 kg, the ideal form of the support system of the load should not interfere with our natural environment, body, balance and body movement. The load of the weight must not disturb or harm to our body parts back.
Backpacks & health issues:In most cases, are the issues of health, the pain in the spine and neck pain. Most of the schools children will always feel pain in the back, because depend depend too much load in her back, the tipping their bodies. Parents, their pockets for the necessary books and stationery they wear or not to check. Because of the heavy load of the height of the children not to increase in their future, and can badly harm pain in the shoulders and back for a long time.
For adults, they can hang heavy load with 30% of their body weight is too much weight that even painful for adults. In 2003, after the investigations by the U.S. Consumer Product Safety Commission, the backpacks overloaded the cause of more than 21,000 internal injuries. security recommendations of the use of backpacks:Do you need to set the size of backpacks with your body, you ensure that it does not hang or not much more wide länger.Wählen backpacks, the not disturbing your Rücken.Verwenden Always two shoulder bags to balance the heaviest weight on both Seiten.Pack schwerer.Wählen object near the back, if you select off for heavy-duty bag when you can feel the weight of thousands of you most and necessary things you wird.Verteilen carry for use buy the weight of the object by pockets halten.Muss not depend much weight greater than 20% of your Körpergewichts.Immer backpacks, and a waist strap to keep the body balanced .
types of backpacks:
Backpacks are available in many different sizes, shapes and functions available. Many backpacks are designed for a specific or for a particular purpose. Some general backpacks are categorized below:
1 Hiking Backpacks: Mon, it is for traveling, picnics, camping and fishing. In which people make their clothes in it with some devices and accessories. It has several pockets and straps for carry too much weight.
2 Backpacks for Riders: Tue Its special backpacks designed for riders. relax with light quality of the rider backpack sitting the driver, and it would not disturb the balance of the bike. third Standard Backpack: Mon are the simple backpack, used the children and older age groups of students for their school, colleges and other educational institutions. 4 Special Purpose Bags: Sat Special-purpose backpacks are for a specific item or a special equipment, such as guitar, laptop, camera, etc Parachute and now many other backpacks for all devices.
Backpacking