Curly belly can exercise the rectus abdominis muscle, but after the curly belly appear lumbar pain need to consider whether it is exercise is not standard posture formed muscle strain, or whether their own lumbar abdominal disease. If there is a problem with the lumbar spine or kidney function is impaired, doing abdominal rolls may cause or aggravate the original disease causing discomfort in the lower back. Also consider whether it is the usual lack of exercise, a one-time exercise too much muscle in a short period of time caused by continuous tightening of the soreness. After the emergence of low back pain combined with their own situation in the exclusion of the whole body of the original back pain disease at the same time pay attention to the posture and amount of control.