Our bodies run on predictable daily schedules. As morning approaches, our body temperature begins to rise, and our cortisol levels climb. Our heart rate and blood pressure spike upon awakening. By mid-morning, we tend to be at our most alert, while many components of athletic performance—including strength, coordination, and flexibility—peak in the afternoon. As darkness descends, the pineal gland dials up its release of melatonin; while we sleep, gastric-acid secretion surges. Similar 24-hour cycles, or circadian rhythms, govern nearly every cell, tissue, and organ in the human body, and almost all of its physiological functions… Read the Original Article>>
Source: The Atlantic
