Try Sensiv Multi-Channel TENS to alleviate muscle pain and increase circulation. TENS ( transcutaneous electrical nerve stimulation) provides relief by interfering with pain signals being sent to the brain to treat a wide range of acute and chronic pain issues. 4 durable, flexible pads come in contact with the body at pain points, including on the arms, shoulders, legs, thighs. calves, and abdomen. Replacement pads are available.