Use two Air Pad to train my sense of balance of the feet after a Achilles tendon tear operated. The foot with the tendon tear I could no longer control over the toes. I put the two pads side by side behind a chair and try walking slowly in the state. In the beginning I lean with the fingertips of both hands easily on the chair from. So I can even go into a light jog. Pillows should not be bulging with air! Inflate as much the first time around the pads that the top and bottom just slightly arch. After the first time you use it then something lapprig. that's right. No longer inflate !!! Only now you can by train the foot from heel to toe. In the beginning it is very difficult. But is getting better within a week. My sense of balance of the legs has already improved after one week. Similarly, the blood flow. I train 2x 5 minutes daily. I can only recommend the pads.