According to a survey, massages are the most popular spa treatment. Massage is more than just me-time: it’s the one treatment consistently backed by research for its health-giving benefits. These benefits include relieving stress-related conditions to helping the rehabilitation process after injury. While there are many types of massage therapy, the general principles are usually the same: massage relaxes tired muscles, stimulates blood and lymph circulation and encourages your body to produce endorphins, the ‘feel good’ chemicals.