What is the correct backpack ergonomics?

Distribute the weight by using both straps, and make sure they're adjusted to sit evenly on your shoulders. If possible, use your chest or hip straps, as well, to take the pressure off of your shoulders. Your backpack should be no heavier than 10% of your body weight.



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Here are some quick tips to correctly position and carry the load of a backpack. Adjust the shoulder straps so that the backpack is high on the back and the shoulder straps are comfortable on the shoulders, as shown below: The backpack should not sway from side to side during walking.

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Fit Adjustment at Home. Your new backpack has several straps to adjust your load for greater comfort. Your legs have some of the strongest muscles in your body, so the goal is to adjust your straps so that the majority of the load rests on your hips.

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Why do backpacks impact posture? Backpacks can change the child's center of gravity, pulling them backwards which then causes their body to pull forwards. If the backpack weight is 15% or higher than the child's body weight it has a high likelihood of causing postural compensation (Brackley 2009).

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How do I make my backpack not slouch?
  1. Wear the backpack on both shoulders and cinch up the straps so that the middle of the backpack reaches the middle of your back. ( ...
  2. Don't jut your chin out. ...
  3. Think about your whole body from the tops of the shoulders and below all the way to the ground supporting the backpack.


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Adjust the torso length. If the length of the pack is too long, the shoulder straps won't rest on your shoulders and all the weight of the pack will ride on your hips. On the other hand, a backpack that's too short will be uncomfortable because the weight will ride on your shoulders.

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Backpacks shift your center of gravity backward a bit, so leaning forward slightly will help you keep balance as you trek. Just enough so that you can easily maintain balance. Too much will cause back strain and the backpack's weight will fall on your back though.

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Pain caused from excessive loads has gained the term “backpack syndrome.” Backpack syndrome causes headaches, neck and back pain, and fatigue. There have been studies examining the effects of carrying backpacks on one shoulder versus both shoulders. Carrying a bag on one shoulder causes significant asymmetries.

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But wearing a backpack incorrectly, or carrying one that's too heavy, can have harmful effects on the spine. Incorrect backpack use is associated with back pain, neck pain, bad posture, and intervertebral disk compression, possibly leading to a herniated disk.

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Should I size up or size down? We recommend sizing down if you are between sizes. It is very important that the waist belt is able to securely tighten around your hips. If your waist belt is too big you will have a hard time getting the weight in your pack to transfer from your shoulders to your hips.

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Depending on the heaviness of your shoulder bag, carrying it predominantly on one shoulder can also cause the opposite side of your spine to spasm, causing tightness and pain in your lower back and sacrum. If you want to avoid any of these results, using a backpack instead of a shoulder bag can be the answer.

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If it sits too low or too high, tighten or loosen the shoulder straps to raise or lower the hipbelt. Fasten the hipbelt buckle and tighten it. Be careful not to overtighten the belt: It should be snug and secure without uncomfortably pinching your hips.

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