快缩肌纤维会靠颤抖来对抗低温，而这些人则是通过增加肌肉收缩，激活慢缩肌纤维来产生热量。“The mutation probably gave an evolutionary advantage during the migration to a colder climate， but in today's modern society， this energy-saving ability might instead increase the risk of diseases of affluence， which is something we now want to turn our attention to，” says Westerblad.维斯特布拉说:“这一基因突变很可能是为了满足向寒冷地域迁徙的进化需要。但在现代社会中，这种储存能量的能力反而会增加患多种疾病的风险，这是我们目前需要关注的问题。”
