Infradian & Ultradian Rhythms

• What is the difference between an ultradian and infradian rhythm?

  Ultradian: shorter than 24 hours, like sleep cycles. Infradian: longer than 24 hours, like menstrual cycles.
• Infradian Rhythms


  Long-term cycles in physiological processes that last from hours to days, weeks, or even years.
• Circadian Rhythm Regulation


  Infradian rhythms help regulate the body's internal clock, which is responsible for the 24-hour sleep-wake cycle.
• Hormone Regulation


  Infradian rhythms affect hormone production, such as the cyclical release of hormones like cortisol and insulin.
• Metabolic Regulation


  Infradian rhythms influence metabolic processes, such as the body's natural fluctuations in energy expenditure and fat storage.
• Mood Regulation


  Infradian rhythms can impact mood and emotional state, with some studies suggesting that infradian rhythms can predict changes in emotional state.
• Physiological Maintenance


  Infradian rhythms help maintain overall physiological health by regulating processes such as sleep, appetite, and immune function.
• 24-hour Circadian Rhythm


  Regulates the body's internal clock for sleep-wake cycles
• 28-day Menstrual Cycle


  A example of an infradian rhythm in females
• Improved Sleep

  Infradian rhythms regulate sleep-wake cycles, leading to better quality sleep and increased cognitive function.
• Better Appetite Regulation

  Infradian rhythms help regulate appetite, leading to healthier eating habits and weight management.
• Enhanced Immune Function

  Infradian rhythms influence immune function, helping the body respond more effectively to pathogens and infections.
• Lifestyle Changes


  Changes in sleep-wake cycles, work schedules, or social routines can disrupt infradian rhythms.
• Environmental Factors

  Exposure to artificial light, noise pollution, or changing ambient temperatures can affect infradian rhythms.