Swedish massage is the foundation for other types of Western massage, including Sports Massage, Deep Tissue Massage and Aromatherapy Massage. A Swedish massage can be slow and gentle, or vigorous and bracing, depending on the therapist think fit what he or she is trying to achieve. In all Swedish massage, the therapist lubricates the skin with massage oil and performs various massage strokes. These movements warm up the muscle tissue, releasing tension and gradually breaking up muscle "knots" or adhered tissues, called adhesions. Swedish massage promotes relaxation, among other health benefits. It is based on the Western concepts of anatomy and physiology, as opposed to energy work on "meridiens" or sen lines in Asian massage systems. Most people get a 50 or 60-minute Swedish or deep tissue massage, but 75 or 90-minutes gives the therapist more time to work the muscle tissue and achieve results.