Progressive Muscular Relaxation (PMR) is a technique to improve physical and mental relaxation, and thus relieve stress. PMR is the tensing or tightening of specific groups of muscles for short periods of time, which is then followed by relaxing that same group of muscles. The process is then repeated a number of times. This technique is sometimes practiced in combination with Deep Breathing, which also helps with stress prevention and control. Additional information on Progressive Muscular Relaxation is provided in our Section on Stress Prevention and Reduction.