If you only wish to use the device for the vibrating platform and not for the red light treatment, you can wear whatever you like. No matter what you wear, the muscles in your body might continue to relax and contract in response to vibrations.
Nonetheless, if you wish to maximize the machine’s capabilities, you must carefully select your clothes. The objective here is to expose your body to red light as much as possible. Upon request, certain employees may instruct you to disrobe.
If you are uncomfortable getting naked, you can still obtain the most benefits by wearing underpants. Since the red light cannot pass through clothing, you should expose as much skin as possible.