The first hard evidence has emerged that we are unable to catch up on lost sleep if it happens night after night- increasing the risk of obesity, heart disease and depression, while cutting mental dexterity.

• 第一次铁证就是周末睡懒觉不仅不能弥补连夜造成的睡眠缺失，还会增加患肥胖、脏病、郁症的风险，甚至会降低神经灵敏度。