Think of the time you wake up. What do you do? You probably constrict or tighten your muscles for a second before stretching—arms above your head, feet stretching downward. After engaging in this ...
When you wake up in the morning, do you choose to do that curled-fist stretch you always yawn through ― or is it kind of involuntary? If you don’t feel in control of the satisfying movement, you might ...