Sleep study reveals poor sleep makes people feel 4.44 years older on average after two nights of broken sleep compared to nine hours.

Sleep study finds poor sleep makes people feel years older, with two nights of broken sleep causing participants to feel an average of 4.44 years older compared to when they had nine hours of sleep. The research from Stockholm University suggests consistent restful slumber is a key factor in helping to stave off feeling one's true age, while insufficient sleep can induce feelings of sleepiness that reduce energy levels and impact overall well-being.