BBC Health News “Bedtime has huge impact in sport”

The New York Times “For Athletes, the Time of an Event can affect Performance”

NHS Choices “Body clock may have effect on sporting performance”

Science Magazine “Your internal clock may determine how good you are at sports”

Scientific American “Super Bowl Success may go to the late-risers”

New Scientist “Sync your sport to your body clock for a personal best”

Reuters “At Rio’s ‘midnight’ Olympics performance may suffer”

Channel 4 “Late risers: slow off the mark but first to finish line”