A：
Female in menstrual cycle, or person who is under below conditions, yet the doctors approve to proceed with rehabilitation, walk and stroll. Conditions: person who has artificial organs in their body (such as cardiac catheter stents), person who suffers from severe brain cardiovascular disease, person who recovers from spine injury, stroke patient, arthritis patient, Leukemia patients, the frail elderly and person with disability. The beginner is required to apply the low but comfortable mode for the initial training. You can go barefoot or wear sports shoes when doing vibration training, but beware of slippery. For users with arched feet or flat feet, please wear appropriate shoes to ensure that your feet are in a comfortable state before performing standing vibration training.