This TENS unit was designed to relieve muscle fatigue and joint pain caused by sports. In recent years, more people of all ages are playing sports. Many experience muscle fatigue in the lower half of the body or joint pain in the wrists, elbows, and legs. Large treatment pads were adopted after studying user needs. Multiple pads can be placed in two locations for simultaneous treatment, and different modes for relieving muscle fatigue and joint pain result in a product design that delivers authentic sports conditioning care at home.