From OSIM
Product Usage Suitability This product is not intended for self-diagnosis or self-treatment of conditions that should be managed by a qualified health care provider. If you are under any medication or fall into any of the following categories (but not limited to), please consult your health care provider first before purchase / use: a) Heart diseases, b) High, or low blood pressure, deep vein thrombosis (DVT), c) Pregnant, d) Diabetes, e) Individuals fitted with medical implants (e.g pacemaker, automatic cardiac defibrillator (AICD), f) Recently underwent surgical operations, g) Those with any bone conditions like fractures, osteoporosis.