dear Tim, thank you so much for reacting. It is very new and I am presuming that in their enthusiasm, colleagues are using it on children because it has such nice effects on adults. I do not use myself. I has been demonstrated on me and I was impressed by the force. I have read a number of adult studies and the one you mention above. The long term effects have not been studied and I do wonder if we can do harm. Do you have any idea what the effects (presuming that it is a forceful mechanical effect) could be on bone and muscles?