Aerobics for Back Pain?

I came across this new study which looked at treating lower back pain with aerobic exercise.  Subjects were divided into a high-intensity aerobic group and a physical therapy group. 

Only the aerobics group showed improvement in symptoms.  Aerobic exercise resulted in significant reductions in pain, disability, and psychological strain.  This is an interesting study, and I am working on getting the full text to obtain more information.