Dave The authors of the Phys Ther reviews claim that there is flawed methodologies behind the Dyson study, and claims that the thermal and non thermal effects of US can be separated in vivo. Don't take my word for it though, read it. It would be interesting to see studies that compare US treatment to: -sham US -a clinic and home program of ice and heat -a control. My opinion is obviously that ice and heat work just as effectively, and are more affordable and empowering for clients, even if they disempower physios.