Sleep1 source
Study Tests a Caffeine-Nap Strategy for Drivers With Treated Sleep Apnea
A Scientific Reports study involving 21 drivers with obstructive sleep apnea found that two coffees improved alertness and reduced driving errors more than one after participants were limited to four hours of sleep. Adding a 15-minute nap produced modest additional benefits, while extending the nap to 30 minutes offered no observed advantage.
Read report→