# Back Problems

- [[evolution]] is a harsh mistress.
  - Our [[spine]] + [[upright posture]] == [[pain]].
- [[article]] [[instinctive sleeping and resting postures]]


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[instinctive sleeping and resting postures]: instinctive-sleeping-and-resting-postures "Instinctive Sleeping and Resting Postures"
[//end]: # "Autogenerated link references"