Biology & Physiology
Why Do We Shiver?
Shivering is your muscles generating heat by contracting rapidly. The hypothalamus orders it when core body temperature drops. Here is how it works.
shiveringthermoregulation
Biology & Physiology
Why Do We Stretch After Waking Up?
The urge to stretch after sleep is called pandiculation. It reactivates muscles, restores circulation, and recalibrates the nervous system after hours of immobility.
stretchingpandiculation