Medical trials have concluded that Shockwave Therapy is very effective in the treatment for Plantar fasciitis.
See medical studies here:
"This meta-analysis shows that the directed application of shockwaves to the enthesis of the plantar fascia at the inferior calcaneus is a safe and effective nonsurgical method for treating chronic, recalcitrant heel pain syndrome that has been refractory to other commonly used nonoperative therapies. The results suggest that this therapeutic procedure should be considered before any surgical intervention, and may be preferable prior to cortisone injection, which has a recognized risk of rupture of the plantar fascia and a frequent recurrence of symptoms."(https://www.ncbi.nlm.nih.gov/pubmed/11991474)