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请点击照片观赏视频

最近流行一项“椅子挑战”(Chair Challenge)，令人不解的是，挑战成功者多为女生，男生几乎失败，因此被冠上“只有女生才可以做到”的名号，这项挑战目前在网上吹起一股热潮。

据《太阳报》报道，这项“椅子挑战”的挑战者一开始要面向墙壁，接著后退三个脚掌长，再弯下腰成90度，并将头靠在墙壁上，然后抓起椅子抬到胸前，最后将其抱起并重新挺起腰杆。

32岁的克里斯蒂娜(Krystyna Sorrentino)和她29岁的未婚夫德文(Devin)一起进行挑战。视频中可见，纤细的克里斯蒂娜轻松完成考验，相反之下，壮硕的德文却怎样也无法站起来。视频在网上曝光，引发许多网友讨论“为何男生无法挑战成功的原因。”

美国科学家杰里米·约翰逊(Jeremy Johnson)表示，这跟重心有关，大部分女生重心低于臀部，而男生则在胸部，因此女生弯下腰重心在脚上，相较之下比男生来的更为稳定。

另外剑桥大学的布莱恩·福特(Brian Ford)教授则认为，女生的重心比男生低不是影响结果的因素，多数男生未能完成挑战主要与脚掌大小有关，一般男生的脚比女生来的要大，男生2个步伐约为60公分，女生为50公分，“因此男生距离墙壁较远，须施力的距离大于女生，且弯腰时腰部会更向下倾，造成男生较难挑战成功”。