Electrical Muscular Stimulation (EMS) Training works with electric impulses, which are similar to the body’s natural stimulus transductions. An EMS device encourages your body to enter a high metabolic state, helping you to tone and sculpt your body, even stubborn areas around your waist, hips and thighs. As the device works your muscles, you’ll notice improved muscle strength and endurance too. With EMS you only need to train for 2×20 minutes a week to see visible results.