Primary biorhythm cycles23 days physical cycle, 28 days emotional cycle and 33 days intellectual cycle. Each of these cycles oscillates following a sine wave between positive and negative values.
Critical days are the days when the wave crosses the zero line. Women are more affected by the emotional biorhythm, men are more affected by the physical biorhythm.
What do biorhythms affect
Physical cycle (lasts 23 days) affects physical fitness, strength and stamina
Emotional cycle (lasts 28 days) affects mood, emotions, perception and creativity
Intellectual cycle (lasts 33 days) affects thinking, learning, memory, communication, logic and analytical abilities
Intuitive cycle with 38 days period affects the ability to predict and the decision making ability
Aesthetic cycle with 43 days period affects creativity and creative skills
Spiritual cycle (psychic, spiritual) has a period of 53 days and affects the perception and the personal relationship to what exceeds a person: to God