Lower back pain is the number one patient complaint in America. Many problems and orthopedic injuries result from poor core stabilization and strength. Females appear to be at a higher risk of suffering such injuries. Jame Zachazewki shows evidence of this in a study he conducted in 1996. He discovered that women have a lack of strength in the lower abdominals and pelvic floor muscles. He explained that 47% of females age 38 and above suffer from incontinence. However, women who participated in a regular weight-training program reduced the incidence of incontinence to only 4%.