Curious

Ultradian Cycles (90-Minute Energy Rhythms)

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Confidence: Medium

Core Concepts

The Problem

The Claim

Working in focused 90-minute blocks, followed by rest, aligns with the brain's natural ultradian cycle and improves sustained attention.

Key Evidence

•EEG studies showing cycles
•Productivity research on ultradian rhythm interventions

Practical Implication

Scheduling work and breaks around ultradian cycles can boost efficiency and mental performance.

Nuance & Limits

Source Material

Citation Density

Gaps

⚠ How to track personal cycles

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