# Chronobiology
3 items
Biological Prime Time
Productivity concept of identifying your personal peak performance hours through energy tracking, then scheduling most important work during these high-energy periods for 20-40% productivity boost.
Energy Peaks and Valleys Method
Time management approach that schedules tasks according to natural energy fluctuations throughout the day. Aligns high-cognitive tasks with peak energy times and routine work with lower-energy periods for optimal productivity.
Nathaniel Kleitman - Ultradian Rhythm Discovery
Sleep researcher who discovered in the 1950s that the human body moves through 90-120 minute cycles (ultradian rhythms) throughout day and night, foundational for understanding natural work-rest patterns.