In his book “Focus – The Hidden Driver of Excellence”, Daniel Goleman
quoted an example based on Susan Butcher who reinvented the Iditarod (a race that sled dogs compete over a distance of more than 1,100 miles of Arctic ice for over a week). Her method is running and resting alternately in 4-to-6-hour periods around the clock instead of 12 hours on and 12 hours off which give her very time to sleep as she needs to prepare for the next move as her dogs sleep. Her husband David Monson explained “Keeping your attention up during a highly exhausting and stressful time means you have to methodical and well practiced, so you make the right decisions under duress” (p. 163)
This point echoes with the 2 main sections of my book on psychological preparation and practice.