EEG recordings revealed that reindeer's brainwaves during rumination resemble the brain waves present during non-REM sleep, and these brainwave patterns suggest that the reindeer are more "rested" after ruminating.

Source: https://phys.org/news/2023-12-reindeer-cud-strategy-summer.html

First of all, the program is developed based on the scientific facts about the brain waves.

Source: https://powdersvillepost.com/billionaire-brain-wave-reviews/

What happens is when you are awake your brain waves are very very small and fast.

Source: https://www.walesonline.co.uk/news/health/sleep-expert-issues-key-piece-27542219