As a massage therapist I have a lot of clients come to me suffering from tightness and soreness, particularly in the upper back/shoulder area. Massage tends to relieve the discomfort but what are these knots and why do you have them in the first place? I will do my best to explain here. Physiology of a Muscle Muscles are made up of layers of tissue with lots of little fibres wrapped up in fascia. These muscle fibres group together and one muscle unit is built, for example, th