What Is a Normal Heart Rate While Sleeping?

Paul Souliac
2026-03-18T06:34:22-07:00

A normal heart rate while sleeping is a sign that your body is properly recharging. If you've ever woken up feeling like you didn't sleep at all, things like discomfort or stress could be affecting your rest and, in turn, your heart. Creating a comfortable and supportive sleep environment is a great first step, and finding the perfect pillow like the Scrumptious Side Pillow can make a world of difference in helping your body relax and recover each night.

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What Is a Healthy Sleeping Heart Rate?

For most adults, a normal resting heart rate is between 60 and 100 beats per minute (BPM). When you fall asleep, it's natural for this number to drop. A healthy sleeping heart rate for an adult is typically between 40 and 60 BPM.

This drop happens because your body enters a state of deep relaxation. Your metabolism slows down, your breathing becomes more regular, and your body focuses on repair and recovery. A lower heart rate during sleep means your heart doesn't have to work as hard, giving your cardiovascular system a much-needed break.

However, "normal" can be different for everyone. Some very active people and athletes might have a sleeping heart rate as low as 40 BPM, which is a sign of excellent heart health. The key is to understand your personal baseline and notice any major changes. You can learn more about achieving restorative rest on our Sleep Wellness blog.

Why Your Heart Rate Changes During Sleep Stages

Your heart rate doesn't just pick one number and stick with it all night. It actually changes as you move through different sleep stages. Understanding this can help you see why consistent, deep sleep is so important.

NREM Sleep (Non-Rapid Eye Movement)

This is where you spend most of your night. NREM sleep has three stages:

Stage 1: The light dozing-off phase. Your heart rate begins to slow down from its daytime pace.

Stage 2: Your body temperature drops, and your heart rate and breathing become even more regular and slow.

Stage 3: This is deep sleep. Your heart rate and breathing slow to their lowest point of the night. This stage is vital for physical recovery and feeling refreshed in the morning.

REM Sleep (Rapid Eye Movement)

REM sleep is when you do most of your dreaming. During this stage, your brain activity looks a lot like it does when you're awake. Because of this, your heart rate and breathing can become faster and more irregular. This is a completely normal part of the sleep cycle. Your body cycles through NREM and REM sleep several times a night, so fluctuations in your heart rate are expected.

Factors That Influence Your Sleeping Heart Rate

Many things can affect your heart rate while you sleep. Some of these are within your control, while others are related to your personal health profile. Knowing what influences your pulse can help you make positive changes for better sleep.

Age: As you get older, your heart rate may change. It's common for resting and sleeping heart rates to vary across different life stages.

Fitness Level: People who exercise regularly often have a lower resting heart rate. Their hearts are stronger and can pump more blood with each beat, so they don't have to work as hard.

Stress and Anxiety: If you go to bed feeling worried or stressed, your body may stay in a "fight or flight" mode. This can keep your heart rate elevated and prevent you from reaching deep, restorative sleep stages.

Medications: Some medicines, like beta-blockers, are designed to lower your heart rate. Others, like certain decongestants, can raise it.

Room Temperature: A room that is too hot or too cold can cause your body to work harder to regulate its temperature, which can affect your heart rate.

Diet: Eating a large meal or drinking caffeine or alcohol close to bedtime can elevate your heart rate and disrupt your sleep.

Your comfort level also plays a huge role. If you're constantly tossing and turning because of an unsupportive pillow, your body can't fully relax. The Scrumptious Side Pillow is designed to provide perfect alignment for your neck and shoulders, reducing physical stress so your heart rate can settle into a healthy rhythm.

What Does a High Heart Rate Mean?

If your heart rate consistently stays high while you sleep (a condition known as tachycardia), it could be a sign that something is preventing your body from relaxing. This means your heart is working overtime when it should be resting.

Several things can cause a high sleeping heart rate:

Sleep Apnea: This condition causes you to stop breathing for short periods during sleep. These pauses can cause a sudden drop in blood oxygen levels, which makes your heart beat faster to compensate.

Anxiety or Nightmares: Mental and emotional stress can trigger a physical response, raising your heart rate even while you're asleep.

Dehydration: Not drinking enough water can make your blood thicker, forcing your heart to pump harder.

Fever or Illness: When your body is fighting off an infection, your heart rate naturally increases to help your immune system.

A consistently high heart rate at night can prevent you from getting quality sleep, leaving you tired and groggy. Improving your sleep hygiene and comfort can often help. For more pillow insights, check out our Pillow Analysis blog.

Is a Low Sleeping Heart Rate a Concern?

For most people, a low sleeping heart rate is a good thing. It often indicates a strong, efficient heart. This is especially true for athletes and people who are very physically fit. Their hearts are conditioned to work more efficiently, so they don't need as many beats to circulate blood.

However, a very low heart rate (a condition called bradycardia) can sometimes be a problem if it's accompanied by other symptoms. If your heart rate is very low and you also experience dizziness, fainting, shortness of breath, or chest pain, it's important to talk to a doctor.

These symptoms could indicate an underlying issue with your heart's electrical system. But for most healthy adults, a sleeping heart rate in the 40s or 50s is a sign of good cardiovascular health and restful sleep.

How to Improve Your Sleep for a Healthier Heart Rate

You can take simple, practical steps to encourage a healthy heart rate while you sleep. Most of these involve creating a routine and an environment that signals to your body that it's time to rest and recover.

Create a Relaxing Bedtime Routine

Wind down for at least 30-60 minutes before you plan to sleep. This helps lower stress and prepares your body for rest.

Avoid screens like phones, tablets, and TVs. The blue light can interfere with your body's production of melatonin, the sleep hormone.

Try gentle activities like reading a book, listening to calm music, or taking a warm bath.

Practice deep breathing or meditation to calm your mind and slow your heart rate.

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Optimize Your Sleep Environment

Your bedroom should be a sanctuary for sleep. Make sure it's cool, dark, and quiet.

Keep it Cool: A slightly cool room temperature (around 65°F or 18°C) is ideal for sleeping.

Block Out Light: Use blackout curtains or an eye mask to prevent light from disrupting your sleep.

Prioritize Comfort: Your mattress and pillow are the foundation of good sleep. An uncomfortable pillow can cause neck pain and restlessness, keeping your heart rate up. The adjustable fill and unique curve of the Scrumptious Side Pillow ensure you have the support you need to stay comfortable all night long. Read reviews from others who have found better sleep, like The Gadgeteer's review of our pillow.

Watch What You Eat and Drink

What you consume in the hours before bed can have a big impact on your heart rate.

Avoid caffeine and nicotine, which are stimulants that can raise your heart rate.

Limit alcohol before bed. While it might make you feel drowsy at first, it can disrupt your sleep cycle later in the night and cause your heart rate to increase.

Avoid heavy, rich, or spicy meals close to bedtime, as they can cause indigestion and elevate your heart rate.

When to See a Doctor

While you can track your heart rate with a wearable device, it's important not to get too obsessed with the numbers. Occasional fluctuations are normal. However, you should talk to a doctor if you notice a consistent pattern that concerns you.

Make an appointment with your healthcare provider if:

Your sleeping heart rate is consistently above 80 BPM, or your resting daytime heart rate is consistently over 100 BPM.

Your sleeping heart rate is very low and you experience symptoms like dizziness, fatigue, or fainting.

You wake up frequently with a racing heart, shortness of breath, or chest pain.

You suspect you may have a sleep disorder like sleep apnea (symptoms include loud snoring, gasping for air during sleep, and daytime sleepiness).

Your doctor can help you understand what's normal for you and determine if any tests are needed. You can find more helpful articles and updates on our main news blog.

Frequently Asked Questions

Can anxiety affect my heart rate while I sleep?

Yes, absolutely. Anxiety and stress trigger the release of hormones like cortisol and adrenaline, which increase your heart rate. If you're feeling anxious, your body can remain in a state of high alert even when you're asleep. This can prevent your heart rate from dropping to a healthy resting level, leading to less restorative sleep and feelings of fatigue the next day.

Does what I eat or drink before bed change my sleeping heart rate?

What you consume before bed can have a significant effect on your heart. Caffeine is a well-known stimulant that can keep your heart rate elevated for hours. Alcohol can also raise your heart rate as your body metabolizes it overnight. A large, heavy meal can also increase your heart rate as your digestive system works to process the food. It's best to avoid these things for a few hours before bedtime.

How can I track my heart rate during sleep?

Many modern fitness trackers and smartwatches have built-in heart rate monitors that can track your pulse while you sleep. These devices can provide you with data on your average sleeping heart rate, show you how it fluctuates through the night, and even track your different sleep stages. While this data can be helpful, remember that these are consumer devices and not medical-grade tools.

Is it normal for my heart rate to fluctuate throughout the night?

Yes, it is completely normal. Your heart rate naturally changes as you cycle through different sleep stages. It will be at its lowest during deep NREM sleep and will become more variable and slightly faster during REM sleep when you're dreaming. These fluctuations are a sign of a healthy, functioning nervous system.

Create a more supportive sleep setup with the Scrumptious Side Sleeper Pillow and give your body a better chance to fully rest and recover.