What Is a Normal Heart Rate During Sleep?

For most healthy adults, the normal resting heart rate while awake ranges between 60 to 100 beats per minute (BPM). However, during sleep, the heart rate naturally decreases due to lower metabolic demands and reduced physical activity. Studies using 24-hour Holter monitoring have shown that heart rate typically drops to around 60 BPM once a person falls asleep.

Understanding Nocturnal Heart Rate

Medically speaking, a nighttime heart rate above 50 BPM is generally considered within the normal range. In some individuals, especially those who are physically fit or athletes, the heart rate may drop as low as 40 BPM during deep sleep. As long as there are no accompanying symptoms such as dizziness, fatigue, or shortness of breath, this slower heart rate during sleep is considered normal and not a cause for concern.

When to Be Concerned About Heart Rate

Bradycardia: A Slow Heart Rate While Awake

If your heart rate consistently falls below 60 BPM while you're awake—especially dipping to 50 BPM or lower—it may indicate bradycardia. This condition can be a sign of an underlying health issue, particularly if it causes symptoms like lightheadedness, weakness, or fainting. In such cases, medical evaluation is recommended.

Tachycardia: A Fast Heart Rate During Sleep

Conversely, a heart rate that exceeds 100 BPM during sleep is considered tachycardia. This could be caused by various factors including stress, sleep apnea, or other medical conditions. If this occurs regularly, it's important to consult a healthcare professional to rule out any serious pathologies or cardiac abnormalities.

Maintaining a Healthy Heart Rate

Monitoring your heart rate during sleep and while awake can provide valuable insights into your overall cardiovascular health. Leading a healthy lifestyle—including regular exercise, a balanced diet, and good sleep hygiene—can help maintain a stable and normal heart rate throughout the day and night.