How is the backpack correct?

one shoulder

It presses the weight of the schoolbag on one side, presses one side of the spine, and pulls the other side, resulting in unequal muscle tension and imbalance, followed by the blood circulation of the shoulder on the compressed side. Certain influence, over time, may lead to abnormal high and low shoulders and curvature of the spine.

Only suitable for bags that are not too heavy to carry in a short time.

Elbow bag

The weight of the bag is borne by the stronger biceps, which feels easier and avoids finger strain.

However, the pressure of the bag is concentrated on the elbow joint, compressing the blood vessels, which will affect the blood circulation. If you maintain this position for too long, the fingertips may become numb and cold.

Crossbody backpack

The shoulder strap is fixed, it is not easy to slip off, and the shoulder joint does not need to move forward, which can avoid hunchback.

However, it is still only one side of the shoulder that is stressed. If only one shoulder is used for a long time, it may lead to deformation of the shoulder over time.

hand carry

Keep the wrist and arm in the same line, this position is the most relaxed. Using the upper arm and forearm muscles, the trapezius is less involved, and the chance of causing high and low shoulders is lower.

However, the finger grip is limited, and the weight of the bag is concentrated on the finger joints. If the bag is too heavy, it will cause finger fatigue.

shoulders

The weight of the backpack will make people unconsciously straighten the chest, adjust the shoulder straps to make the backpack close to the back, and the pressure is evenly transmitted to the spine and back muscles through the two shoulder straps, which is not easy to produce fatigue, and is also a backpack method that can bear the most weight.

If the shoulder straps are too long, the backpack sags backwards and is not close to the back, and the shoulders need more strength to ensure the stability of the backpack, which will put pressure on the trapezius muscles.

Experts suggest that the backpack should not be too heavy as much as possible, and it is not possible to use only one shoulder backpack for a long time. It is best to rotate the left and right shoulders and the left hand in different postures to avoid local muscle fatigue.