picture this… you’ve been studying for hours with a hunchback. you place your thumbs in the middle of your back and bend until it cracks.
i’m breaking my own back ✊
Ideally you do this laying on your back in bed. Dig your heel into the mattress and then slowly pull your foot towards you (make sure you’re really dug in and doing this slow.)
The crack is out of control especially after a long day on your feet.