The Pegasus 2 Smart features heat in the lumbar and calves. Heat therapy helps ease tension and stress, relieve arthritis pain, and heal sore muscles. Warm muscles are more pliable, making the massage treatments more effective. The thermal calf and knee massage target one of the most injury-prone spots on the body. During your automatic massage, the leg massager moves from the ankles up to the knee while applying heat and gentle airbag modulations to stretch tendons and soothe painful inflammation.