Rest Is The Brain's Hidden Engine: Why Pauses Boost Thinking

Although the brain accounts for about 2% of body weight, it uses roughly 20% of daily energy, and new insights show that most of this occurs during resting states. Effortful, goal-directed tasks only raise energy use by about 5% above rest, so the bulk of 'work' happens in quiet, background brain activity. The takeaway is to embrace rest and off-task thinking as productive, letting the brain's quieter processes surface insights rather than forcing more strenuous sprinting of sentences.