哈佛医学院的一项最新报道表明，传统仰卧起坐只能锻炼到特定的肌肉群，并不能起到强化全身核心肌肉的作用。
A new report from Harvard Medical School disclosed that traditional sit-ups only target certain muscle groups instead of strengthening the entire set of core muscles.
像仰卧起坐、俯卧撑和引体向上这些传统运动，只要你做得正确，就有利于强身健体。
Traditional exercises like sit-ups, press-ups and pull-ups are great for strengthening the body, providing you do them properly.
加拿大滑铁卢大学的生物力学脊柱教授斯图尔特·麦吉尔对仰卧起坐已经研究多年，深信这一传统的收腹运动确实会有损我们的身体。
Stuart McGill, professor of spine biomechanics at the University of Waterloo in Canada has been studying sit-ups for years and is convinced that the traditional crunch does indeed cause us harm.
加拿大滑铁卢大学的生物力学脊柱教授斯图尔特·麦吉尔对仰卧起坐已经研究多年，深信这一传统的收腹运动确实会有损我们的身体。
Stuart McGill, professor of spine biomechanics at the University of Waterloo in Canada has been studying sit-ups for years and is convinced that the traditional crunch does indeed cause us harm.
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