“建议的机制有的强迫性，”约翰·汤姆斯john . Thompson是加拿大滑铁卢大学的分子生物学家。

"The proposed mechanism is compelling," says John Thompson, a molecular biologist at the University of Waterloo in Canada.

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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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滑铁卢大学的研究者们调查了1967年至1984年进行的60项科研资料，并且把他们的发现发布在《加拿大医学协会杂志》上。

The University of Waterloo researchers have examined 60 scientific studies conducted between 1967 and 1984, and published their findings in the Canadian Medical Association Journal.

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