In this video, Alex is demonstrating Ankle Pumps. Ankle pumps assist in preventing blood clots (DVTs) and reducing swelling through the muscle pump action of the calf muscles. Ankle pumps can also reduce stiffness at the ankles.
Perform 5-10 repetitions, 1-2x/day
The number of exercise repetitions and sets per day are just a suggestion and should be adjusted, as needed, to fit your fitness level and tolerance.