If you do some research on the plantar fascia, you'll find a lot of diagrams like the one below:
It shows the plantar fascia and the Achilles tendon as being separate structures, which they technically are. But they are not quite as separate as most people assume. Especially in younger people, the plantar fascia and Achilles tendon are actually connected by tendonous fibers. (Although fascia are not officially classified as tendons, they are composed of tendon-like collagen fibers, and are very similar in structure.)
What this means is that any rehabilitation effort for plantar fasciitis or plantar fasciosis should include work for the Achilles tendon as well. If your doctor or therapist isn't paying any attention to your Achilles tendon and you're not getting better, this might be the reason.
Target Plantar Fasciitis has a full range of exercises for the plantar fascia, Achilles tendon and the posterior tibial tendon. If you've been experiencing tendon or fascia problems for more than about two weeks, chances are that your doctor or therapist hasn't diagnosed the real nature of your condition. For only $29.97 (less than one visit to a doctor) you can try the techniques in the ebook and full-demonstration video for 60 days risk-free. If you don't think the therapies given are the most effective and cutting-edge that you've ever tried, I'll refund 100% of your money with no questions asked.