Traditional Thai massage has been used in Thailand for more than 2,500 years for muscle relaxation and healing. The technique focuses on the invisible energy lines that traverse the body called “Sen”. Although there are 72,000 invisible energy lines, only ten of these are essential for the healing of all the body parts and internal organs. Traditional Thai massage principles work on the basis that when these energy lines become blocked, many ailments can result. The experience involves a combination of gentle pressures along the Sen Lines and Yoga-like stretches, because of this it is often referred to as a type of assisted Yoga. The popularity of massage has grown.