Napping boosts immune health and stymies stress

As well as being critical for recovery from stress and boosting alertness in the sleep-deprived, short naps may have long-term, prophylactic effects on cardiovascular health, the study authors concluded.  

In the laboratory-based crossover study of 11 healthy men aged 25–32, French researchers found that after being restricted to only two hours of sleep, the participants had a 2.5-fold increase in norepinephrine levels compared to controls, and lower levels of interleukin-6, a protein with antiviral properties.