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90 Minute Focus Block

Meaning

A defined temporal interval of approximately 90 minutes dedicated to uninterrupted, high-concentration cognitive work. This period is physiologically aligned with the natural human ultradian rhythm, which dictates cyclical peaks and troughs in alertness and neurobiological efficiency. Optimal engagement during this block aims to maximize neural resource allocation and minimize cognitive fatigue, thereby enhancing the quality of intellectual output. It serves as a structured approach to deep work, respecting the brain’s inherent cycle of energy expenditure and recovery.