In a scientific medical experiment, it didn't show any effectiveness by Shiatsu treatment for less than 20 minutes. There was no difference in blood pressure, breathing, body temprerature, and heartbeat by such a short-time Shiatsu treatment. It is necessary to do Shiatsu treatment for more than 30 minutes in order to produce a certain effect or result. Most of Shiatsu clinics take about 30 to 60 minutes for one session.