Why Is My Resting Heart Rate So High? 9 Notable Causes and What to Do

Photo of author

Resting heart rate (RHR) is the number of times your heart beats per minute while at rest. It serves as a crucial indicator of overall cardiovascular health and fitness. A high resting heart rate can be a cause for concern, as it may suggest underlying health issues or lifestyle factors that need attention. In this article, we will explore nine notable causes that can contribute to a high resting heart rate, shedding light on the potential reasons behind this phenomenon.

1. Lack of Physical Fitness: A Major Contributor

One of the primary culprits behind a high resting heart rate is a lack of physical fitness. Regular exercise is vital for maintaining a healthy heart and optimizing cardiovascular function. When you engage in physical activity, your heart gets stronger and more efficient, resulting in a lower resting heart rate. Conversely, a sedentary lifestyle can lead to a higher resting heart rate, as the heart has to work harder to pump blood throughout the body. Incorporating aerobic exercises like swimming, running, or cycling into your routine can help lower your resting heart rate and improve overall heart health.

2. Stress and Anxiety: Impact on Heart Health

Stress and anxiety can have a profound impact on heart health, often leading to an elevated resting heart rate. When you experience stress or anxiety, your body releases stress hormones like adrenaline, causing your heart rate to increase. Prolonged or chronic stress can keep your heart rate elevated even during periods of rest. To manage stress and anxiety, consider relaxation techniques such as deep breathing exercises, meditation, or engaging in activities that you find calming. Seeking professional help may also be beneficial in addressing underlying psychological issues contributing to elevated heart rate.

3. Medications: Potential Side Effects

Certain medications can influence your resting heart rate. Stimulant medications like those used to treat attention deficit hyperactivity disorder (ADHD) or asthma can cause an increase in heart rate. Additionally, decongestants, certain antidepressants, and thyroid medications may also have an impact. If you suspect that your medication is affecting your resting heart rate, consult your healthcare provider to discuss potential alternatives or adjustments to your dosage.

4. Dehydration: Effects on Heart Rate

Dehydration can lead to an increase in resting heart rate. When your body lacks adequate fluids, your blood volume decreases, causing your heart to work harder to circulate the reduced amount of blood. This increased effort results in a higher resting heart rate. To stay properly hydrated, ensure you are drinking enough water throughout the day, especially during physical activity or in hot weather. Monitor your urine color to gauge your hydration status; a pale yellow color is a good indicator of proper hydration.

5. Thyroid Disorders: Influencing Resting Heart Rate

Thyroid disorders, such as hyperthyroidism, can significantly impact resting heart rate. An overactive thyroid gland produces excess thyroid hormones, which can accelerate heart rate and metabolism. As a result, individuals with hyperthyroidism often experience a higher resting heart rate. If you suspect a thyroid disorder, consult your healthcare provider for proper diagnosis and treatment options. Medications, radioactive iodine therapy, or surgery may be prescribed to manage the condition and help regulate your heart rate.

In conclusion, a high resting heart rate can be influenced by various factors, including lack of physical fitness, stress and anxiety, medications, dehydration, and thyroid disorders. Understanding these causes can help you identify potential reasons for your elevated resting heart rate and take appropriate steps to address them. Remember, if you have concerns about your resting heart rate, it is always best to consult with a healthcare professional for a comprehensive evaluation and personalized advice.


Q1: What is considered a high resting heart rate?

A1: Generally, a resting heart rate above 100 beats per minute (BPM) is considered high. However, it is essential to consider individual factors such as age, fitness level, and overall health when determining what is considered high for each person.

Q2: Can caffeine consumption affect resting heart rate?

A2: Yes, caffeine can increase resting heart rate temporarily. It has stimulant properties that can elevate heart rate. If you notice a higher resting heart rate after consuming caffeinated beverages, it may be worth reducing your intake and monitoring any changes.

Q3: Can weight gain contribute to a high resting heart rate?

A3: Yes, excessive weight gain can lead to an increased resting heart rate. The extra weight puts additional strain on the cardiovascular system, causing the heart to work harder to pump blood. Maintaining a healthy weight through proper diet and regular exercise can help reduce resting heart rate.

Q4: Can anemia affect resting heart rate?

A4: Yes, anemia, a condition characterized by a low red blood cell count, can impact resting heart rate. Anemia reduces the amount of oxygen-carrying capacity in the blood, causing the heart to pump faster to compensate for the oxygen deficit. Treating the underlying cause of anemia can help regulate heart rate.

Q5: Can certain medical conditions contribute to a high resting heart rate?

A5: Yes, certain medical conditions like heart disease, hypertension (high blood pressure), and diabetes can contribute to an elevated resting heart rate. Proper management and treatment of these conditions can help stabilize heart rate.

Q6: Does age affect resting heart rate?

A6: Yes, resting heart rate tends to increase with age. As we grow older, our heart muscles may weaken, leading to a higher resting heart rate. However, regular exercise and a healthy lifestyle can help mitigate age-related changes in heart rate.

Q7: Can genetics play a role in resting heart rate?

A7: Yes, genetics can influence resting heart rate. Some individuals may have naturally higher or lower resting heart rates due to genetic factors. However, lifestyle choices and interventions can still help manage and optimize heart rate, even if influenced by genetics.

Leave a Comment