Stress urinary incontinence is the leakage of urine with "stressors" on the body, which can include coughing, laughing, sneezing, running, jumping, or even daily activities such as standing up from a chair or climbing stairs. Stress urinary incontinence can be caused by a multitude of factors and is rarely due to one impairment. The body's trunk, including the diaphragm, abdominal muscles, lumbar muscles and the pelvic floor, regulates pressure during these various activities. Urine leaking can occur when one or more of the components of this pressure regulation system are not functioning as they should during a stressor activity.