Ninety-Minute Brain: Hacking Your Ultradian Rhythms

We are obsessed with the 24-hour circadian rhythm, yet we completely ignore the microscopic clocks ticking inside our nervous system every single day. You do not lose focus at 2:00 PM because you are lazy; you lose focus because you are fighting against the relentless biological tide of your Ultradian Rhythms. Ultradian rhythms are natural, 90-to-120-minute cycles of brainwave activity that dict...