The trunk muscles activity on whole body vibration during bridging position in young healthy adults

Abstract

The aim of this study is to compare the activity of the trunk muscles on the unstable surface (US) and on the whole body vibration (WBV) during the bridging exercise mainly used for increasing the trunk stability in clinic research. The study randomly divided 32 healthy males into two groups. Both groups performed 3 types of position (the supine position, the prone position, and the sidelying position) on the US (Group A) and on the WBV (Group B). The surface electromyography was used to measure the muscle activity of the trunk muscles (rectus abdominis, external oblique, internal oblique, multifidus and erector spinae). When the bridging exercise was practiced in the supine position, the activities of the internal oblique, multifidus, and erector spinae were significantly increased on the WBV more than on the US (p<0.05). In the prone position, the activities of the rectus abdominis, multifidus, external oblique, internal oblique, and erector spinae were significantly increased on the WBV more than on the US (p<0.05). It is thought that the bridging exercise on the WBV is more effective at increasing trunk's muscle activation than on the US and that the intervention method of the WBV can be utilized as the bridging exercise program intervention used in the exercise method of the trunk stability in clinical research.