Question

Зависимость пульса от времени суток. Почему вечером пульс чаще , чем днём?

Answer 1

Dependence of Heart Rate on Time of Day

The heart rate, or pulse rate, can vary throughout the day and is influenced by various factors, including physical activity, stress levels, and the body's circadian rhythm. The circadian rhythm is the internal biological clock that regulates various physiological processes, including sleep-wake cycles and hormone production.

In the evening, the pulse rate is often higher than during the day. This can be attributed to several factors:

1. Physical Activity: During the day, people are generally more active, which can lead to an increase in heart rate. Engaging in physical activities such as exercise or work can temporarily elevate the heart rate. In the evening, as physical activity decreases, the heart rate tends to return to a resting state.

2. Stress Levels: Throughout the day, individuals may encounter various stressors, such as work-related pressures or personal responsibilities. Stress activates the body's "fight-or-flight" response, which can increase heart rate. In the evening, as stress levels typically decrease, the heart rate may gradually return to a normal range.

3. Circadian Rhythm: The body's circadian rhythm influences various physiological processes, including heart rate. The circadian rhythm follows a 24-hour cycle and is regulated by internal biological clocks. It affects hormone production, body temperature, and other bodily functions. The circadian rhythm tends to lower heart rate during sleep and gradually increase it upon waking up. Therefore, in the evening, as the body prepares for sleep, the heart rate may start to increase.

It's important to note that individual variations exist, and some people may experience different patterns in heart rate fluctuations throughout the day. Additionally, certain medical conditions or medications can also affect heart rate patterns. If you have concerns about your heart rate or notice any significant changes, it is recommended to consult with a healthcare professional for a proper evaluation.