Ekadashi is the 11th day after the full moon and the new moon, respectively. If you go without food on this day and stay alert, your awareness will turn inward.
If you bring a yogic practice such as the Shambhavi Mahamudra into your life, the body will remain restful throughout the day, and your sleep quota will decrease.
We have engineered the outside world in so many ways, but we have done nothing to engineer how we are within ourselves. If you want to know wellbeing, in is the only way out.