Eli5 How do you not lift with your back? Won’t there always be strain on your back?
In: Physics
Your back is made from lots of bones (vertebrae) and discs between them acting as cushions.
If you lift with your back vertically the pressure on the discs is evenly distributed.
If you lift with your back at an angle the pressure on the discs is more on one side than the other. The pressure on one side of the disc can cause it to slip out of position (hence having a slipped disc) or cause the disc to bulge on the other side (think of squeezing one side of a balloon) where it can press on the nerves running down your spine.
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