The Fasciitis Fighter is a commercially available device to help with exercises for plantar fasciitis. It is based on the technique of doing heel or calf muscle raises with a towel rolled up under the toes. As rolling up a towel can be somewhat inconvenient every time you want to do these exercises, the Fasciitis Fighter was developed to make it easier.
The key with doing the exercises this way for plantar fasciitis is that the big toe is elevated, so while doing the heel raise more tension is placed on the plantar fascia. There is some evidence that this is an effective exercise for plantar fasciitis, though the value of the exercise has been overhyped in social media.
