Traveling across time zones can also disrupt your circadian rhythms. Studies show that shift workers have increased risk for heart disease, digestive disturbances, cancer, depression, and other health problems. They may be tired at work and have trouble falling or staying asleep during daylight hours after work. “There are lots of modern situations that can disrupt our rhythms, and some may contribute to health problems.”įor instance, shift workers who must be on the job after the sun goes down are at odds with their biological clocks. “Our around-the-clock society creates challenges for our internal clocks,” Sesma says. Time of day has also been shown to impact the effectiveness and side effects of certain medications, including those used to treat cancer.īe mindful about how you may be altering your circadian rhythms. This can lead to increased body fat and weight gain, which are often associated with obesity, heart disease, and diabetes. Researchers have found that eating later in the day, closer to when melatonin is released, can disrupt the body’s natural rhythms. For instance, heart attacks are more likely to occur early in the morning, when the level of a hormone called cortisol starts its daily rise.Ĭircadian rhythms can influence eating habits, digestion, and metabolism (how our body uses and stores energy), too. Even the timing of health-related events can be related to your biological clocks. These settings can affect body temperature, blood pressure, activity level, inflammation (your body’s protective response to injury or infection), fertility, mood, and brain functions. Your biological clock’s “settings” are determined by specific genes. “Many of your body’s functions and normal daily activities-like sleeping, waking, eating, and going to the bathroom-are patterned around this 24-hour cycle,” Sesma explains. Melatonin makes you feel drowsy and helps you stay asleep. In the evening, when less light enters your eyes, it triggers production of a hormone called melatonin. that will help keep you awake, boost your heart rate, and give you energy. During the day, it sends signals to other brain regions to make hormones A substance produced in one part of the body to signal another part to react a certain way. A “master clock” in the brain receives direct input from the eyes and coordinates all the biological clocks in the body. Our natural daily rhythms are synchronized with the sun. Learning how the rhythm is generated is critical for understanding health.” “They affect almost every part of your physiology in one way or another. Michael Sesma, an expert in circadian biology. “Circadian rhythms are big influencers in the body,” explains NIH’s Dr. Keeping your body’s daily cycles, or circadian rhythms, in sync is important for your health. Did you know that your body has its own internal network of clocks? These biological clocks help you feel alert during the day, hungry at mealtimes, and sleepy at night.