Energy
90-Minute Ultradian
Match your work to your body's natural 90-minute energy waves, then truly rest.
Medium Effort90 minRhythm-based
The Science
Basic rest–activity cycles (BRAC) regulate alertness throughout the day; honoring them prevents the slow drain that mimics burnout.
How to do it
- 1Work for 90 minutes on something meaningful.
- 2Rest 20 minutes. Walk, snack, stare out a window.
- 3Repeat 2–3 times across your day.
Try it · Start 90-min cycle
Deep FocusRounds · 0
25:00