Yes, stress increases your resting heart rate. When you feel anxious, angry, or overwhelmed, your body releases hormones that make your heart beat faster and your blood vessels narrow. During even mild psychological stress, heart rate rises by an average of about 9 beats per minute. Under more intense stress, the jump can be much larger, with studies showing increases from a baseline of around 74 bpm to 87 bpm during a stressful task.
How Stress Speeds Up Your Heart
Your body responds to psychological stress the same way it responds to physical danger. When you feel tense, frustrated, frightened, or anxious, your system floods with stress hormones, primarily adrenaline and cortisol. These hormones prepare your body for action by pushing blood toward your core, narrowing blood vessels, and increasing the rate and force of your heartbeat.
This is your sympathetic nervous system taking the wheel. It overrides the calming signals from the vagus nerve (the long nerve running from your brainstem to your abdomen that normally keeps your heart rate steady and slow). The result is a faster pulse, even when you’re sitting still. A normal resting heart rate for adults falls between 60 and 100 bpm, and stress can push you well above your personal baseline within that range or beyond it.
Short-Term Stress vs. Ongoing Stress
A single stressful event, like public speaking or a tense phone call, produces a sharp but temporary spike. In lab studies, a speech task raised participants’ average heart rate from 74 to 87 bpm. Once the stressor ends, heart rate itself tends to return to baseline relatively quickly. One study found that heart rate and the average interval between heartbeats returned to normal almost immediately after the stressful task stopped.
But that doesn’t mean your cardiovascular system fully resets right away. Deeper measures of nervous system activity tell a different story. Markers of sympathetic arousal (the “fight or flight” branch) remained elevated for at least 20 minutes after the stress ended, even when participants reported feeling calm again. In other words, your body can still be physiologically stressed after your mind has moved on.
Chronic stress is a different problem entirely. When you live with ongoing work pressure, financial worry, relationship conflict, or anxiety, your body stays in a partially activated state. Over weeks and months, this sustained activation can keep your resting heart rate higher than it would otherwise be, because your nervous system never fully returns to its relaxed baseline.
Why a Higher Resting Heart Rate Matters
A persistently elevated resting heart rate is more than an inconvenience. A large meta-analysis pooling data from multiple long-term studies found that people with the highest resting heart rates had a 69% greater risk of dying from cardiovascular disease compared to those with the lowest rates. People with a resting heart rate above 80 bpm specifically had a 49% increased risk.
The relationship follows a dose-response pattern: every 10 bpm increase in resting heart rate was associated with a 6% rise in cardiovascular mortality risk. Separately, research published in the European Heart Journal found that people whose heart rate jumped the most during mild mental stress had roughly double the risk of sudden cardiac death compared to those with a smaller response, even after accounting for other risk factors. This suggests that both your baseline rate and how dramatically your heart reacts to stress carry meaningful health information.
How to Get an Accurate Reading
If you’re tracking your resting heart rate to see whether stress is affecting it, when and how you measure matters a lot. Research on 24-hour heart rate patterns found that a true resting heart rate is best captured between 3:00 and 7:00 a.m., when your body is at its lowest activity level. For a practical daytime measurement, sit quietly for at least four minutes before checking your pulse or reading a wearable device. Activity in the hours before your measurement can also skew results, so avoid measuring right after exercise.
If you’re using a smartwatch or fitness tracker, look at your overnight heart rate trends rather than single daytime readings. A gradual upward drift over weeks, especially if your exercise habits haven’t changed, can be a signal that stress, poor sleep, or other factors are affecting your cardiovascular baseline.
Lowering a Stress-Related Heart Rate
The most direct way to bring down a stress-elevated heart rate is to activate your vagus nerve, which acts as a brake on your heart’s pacemaker. Several physical techniques stimulate this nerve and can slow your pulse within seconds. The Valsalva maneuver (bearing down as if straining during a bowel movement) is one of the most well-known. Submerging your face in cold water triggers the diving reflex, which rapidly activates the vagus nerve. Slow, deep breathing with a long exhale works through the same pathway, though more gently.
These techniques address the immediate spike. For chronically elevated resting heart rate driven by ongoing stress, the solutions are broader. Regular aerobic exercise is one of the most effective ways to lower resting heart rate over time, because it strengthens the heart’s pumping efficiency and improves vagal tone. Consistent sleep, reduced caffeine and alcohol intake, and stress management practices like meditation or breathing exercises all contribute to a lower baseline. Even moderate changes in these areas tend to show up as measurable drops in resting heart rate within a few weeks.
Tracking your resting heart rate over time gives you a surprisingly useful window into how well you’re managing stress. A rate that trends downward as you make lifestyle changes is concrete feedback that your body is spending more time in a calm, recovered state.