Similar to last week’s stretch https://ascentpt.wordpress.com/2014/07/02/exercise-of-the-week-towel-ankle-dorsiflexion-stretch/, this is an easy way to improve your ankle range of motion, especially if you are non-weightbearing. Often when you are recovering from a foot or ankle injury or surgery, you will need safe ways to increase your range of motion. Inversion and eversion are movements inwards and outwards that occur at the hindfoot (heel).
As with all stretches, hold for a minimum of 30 seconds. To determine whether or not you would benefit from this stretch, check with your physical therapist.