Bio-Cycles are natural cycles that govern your physical energy, emotional state, and mental clarity. They follow precise, predictable patterns that begin at birth, and when tracked properly, they can give you powerful insight into your best and worst days for action, communication, creativity, and more. THESE FOUR CYCLES FORM THE CLASIC BIO-CYCLES MODEL: Physical (23 days): Strength, energy, endurance, coordination, and resistance to disease. Emotional (28 days): Mood, sensitivity, creativity, perception, and mental health. Intellectual (33 days): Analytical thinking, logic, memory, alertness, and decision-making. Intuitive (38 days): Governs the subconscious perception, spiritual awareness, and instinct.