What Losing Sleep Does to Your Emotions
Across fifty years of experiments, sleep loss reliably lowered positive mood and raised anxiety, even after a single short night.
Sleep, Emotional Health, Stress Management, Anxiety, Women's Health
This review brought together more than 150 experiments spanning fifty years, in which researchers deliberately shortened or disrupted people's sleep and measured the effect on emotion. Losing sleep consistently reduced positive feelings such as joy and contentment and increased anxiety, and these effects appeared even after modest losses, like staying up an hour or two beyond the usual. Because the studies manipulated sleep directly, they offer stronger evidence of cause than surveys can, though most participants were young adults with an average age of 23, so the picture for midlife and older women is less certain. Effects on low mood and sadness were smaller and more variable than those on positive emotion and anxiety. For a woman running on short nights through a busy season, it reframes flattened mood and a shorter fuse as predictable consequences of lost sleep, and as something a protected night can begin to repair.