Question 1

Why do humans get lower back pain when other animals don't?

Accepted Answer

Humans inherited a spine built for four-legged movement and retrofitted it to stand upright. That shift concentrated gravity's force on the lowest vertebrae and discs, a burden four-legged animals never carry, making the lower back a lasting weak point.

Question 2

Is lower back pain really caused by evolution?

Accepted Answer

Partly. Walking upright reshaped the spine into a compromise structure prone to disc wear, and we now live long enough to feel it. But sedentary modern life, especially prolonged sitting, is a major additional cause that our ancestors did not face.

Question 3

Why do hunter-gatherers have less back pain than office workers?

Accepted Answer

Traditional societies move constantly, walking, squatting, and carrying loads, which nourishes spinal discs through motion. Office life folds the spine into a chair for hours, starving discs of movement, which is linked to higher rates of chronic lower back pain.

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The Upright Gamble