# Work Cycles

> Browse 2 items tagged with Work Cycles.

## Items

- [Ultradian Rhythm Method](https://timetrack.works/items/ultradian-rhythm-method) — 90-120 minute natural productivity cycles discovered by Nathaniel Kleiterman, showing 40% higher productivity and 50% less mental fatigue when work aligns with biological energy patterns.
- [Ultraworking](https://timetrack.works/items/ultraworking) — A structured productivity system and virtual coworking platform combining work cycles, accountability, and community support for deep work and focused execution.

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_Canonical page: https://timetrack.works/tags/work-cycles_