Sitting up straight using back and core muscles instead of slouching is better for posture and less likely to contribute to back problems. Why, then, is slouching more comfortable? How does it make sense biologically that the worse option is the easier?
• Tetrapods such as ourselves are segmented animals. This is an essential part of human morphology, the basis of much of our anatomy and our bodily function. One important consequence of this is that our spinal columns are flexible, articulated structures, rather than fused and rigid. This is most spectacularly demonstrated in snakes and fish, but is also…
