
What is the normal resting heart rate?
My heart beats a bit faster when I walk around, and it slows down when I lie down. What is the normal resting heart rate while lying down?

Resting heart rate, also known as安静 heart rate, refers to the number of heartbeats per minute while in a state of wakefulness and inactivity. The normal values vary depending on age.
For adults, including most elderly individuals, the normal resting heart rate ranges from 60 to 100 beats per minute. For newborns, the normal heart rate while at rest is between 130 and 150 beats per minute, while for children aged 2 to 4 years, it is between 100 and 120 beats per minute.
Heart rate may fluctuate due to various factors such as age, gender, body weight, diet, and physical activity. For example, athletes or individuals who exercise regularly often have lower heart rates at rest because their hearts are stronger and more efficient. Their resting heart rates may be below 60 beats per minute. This lower resting heart rate reflects their good physical fitness and cardiac adaptation, indicating that the heart can pump sufficient blood to meet the body's needs with fewer beats.
If the resting heart rate consistently exceeds 100 beats per minute or falls below 40 beats per minute, especially when accompanied by symptoms such as dizziness or chest tightness, medical attention should be sought promptly.