3Panjabi M M. The stabilising systemofthe spine. Part 1. Function, dysfunc-tion, adaption, and enhancement[J]. J Spinal Disord, 1992(5): 383-389.
4Cholewicki J, Juluru K, Radebold A, et al. Lumbar spine stabilitycan be augmented with an abdominal belt and/or increased intraabdominal pres-sure[J]. Eur Spine J, 1999(8): 388-395.
5Gregory J L. Trunk muscle activity during bridging exerciseson and off a Swissball [EB/OL]. http://www. chiroandosteo, corn/content/13/1/14.
6Veerle K S. Trunk muscle activity in healthy subjects duringbridging stabilization exercises[EB/OL], http:// www.biomedcentral.com/1471-2474/7/75.
7Paul Frediani. Get on the ball[J], fitness RX magazine, 2003(8): 80.
8Panjabi M, Abumi K. Spinal stability and intersegmental muscleforces. A biomechanical model[J]. Spine, 1989(2): 194-200.
9Cholewicki J, Juluru K, McGill S M. Intra-abdominal pressuremechanism for stabilizing the lumbar spine[J].J Biomech, 1999, 32: 13-17.