> I'd be more interested in understanding the long-term effects of insufficient sleep. I will confidently guess it involves more infections/sick-days. More zit

> I'd be more interested in understanding the long-term effects of insufficient sleep. I will confidently guess it involves more infections/sick-days. More zits, and general inflammation. Higher cortisol/stress/angst. Higher rates of gastro-intestinal complaints (IBS, heart-burn). If I skimmed the article correctly it measured ability to concentrate for a short time exclusively and ignored these others metrics.