Over the last 60 years, EMS technology has been refined to create the small, portable, and comfortable version you have access to today with Le Peach. The soft gel pads are skin-friendly, even for people with sensitive skin.The first time you use your Le Peach Trainer, we recommend that you start with the lowest intensity so that you can get used to how it feels. This is a new experience, and the pulses may be a strange sensation at first: it will feel like your muscles are squeezing and relaxing repeatedly in different patterns, but without you telling them to. Once you get used to the sensations, you can explore the higher intensities and really challenge your muscles!