What happens if someone has a very high resting heart rate?
From NCERTAsked by Anonymous from Allentown, United States2 Oct 2026, 8:28 AM ISTUpdated
In one line
A very high resting heart rate means your heart is working too hard, even when you are resting, which can be a sign of health problems.
The rule
Resting heart rate is the number of times your heart beats per minute when you are calm and not active.
A normal resting heart rate for most adults is 60–100 beats per minute (bpm).
Let's understand it simply
Imagine you are sitting quietly, maybe watching TV or reading. Your heart should beat slowly because your body does not need much energy. Think of your heart like the engine of a cycle rickshaw. If the rickshaw is standing still, but the engine is running very fast, something is wrong. The engine will wear out quickly. In the same way, if your heart beats too fast when you are at rest, it puts extra strain on your heart.
How it works
Your heart pumps blood to supply oxygen and nutrients to your body.
When you rest, your body needs less oxygen, so your heart should slow down.
If your resting heart rate is very high (for example, above 100 bpm), your heart is working harder than it should.
This can tire out the heart muscle over time.
A high resting heart rate can be caused by stress, fever, dehydration (not enough water), too much caffeine, or heart problems.
What happens if resting heart rate is very high
Heart beats too fast at rest
Heart works harder than needed
Heart muscle gets tired
Risk of heart problems increases
The story behind it
Doctors have measured heart rates for hundreds of years to check health. In the past, they used their fingers to feel the pulse. Today, we use machines, but the idea is the same: a fast pulse at rest can mean trouble. Doctors noticed that people with high resting heart rates often had more heart problems later in life.
Where you see it in real life
A person sitting in a crowded bus, feeling anxious, may notice their heart beating fast → stress can raise resting heart rate.
Someone with a fever has a fast pulse even while lying down → illness can make the heart work harder.
Drinking too much chai or coffee before bed → caffeine can increase your resting heart rate.
People who never exercise may have a higher resting heart rate → weak heart muscle.
A patient in a hospital with heart disease often has a high resting heart rate → the heart is struggling to work properly.
Why it matters
A high resting heart rate can be an early sign of heart disease.
It can increase the risk of heart attacks and heart failure.
Doctors use resting heart rate to check if your heart is healthy.
Lowering your resting heart rate (by exercise, eating healthy, managing stress) can help you live longer.
Common mistakes
Thinking a high heart rate is always good (it is only good during exercise, not at rest).
Ignoring a fast pulse when you are calm.
Believing only old people get high resting heart rates (young people can have it too, due to stress or illness).
Remember it
If your heart beats too fast when you are resting, it is a warning sign — like a cycle bell ringing when there is no traffic.
Check yourself
What is a normal resting heart rate for adults?
60–100 beats per minute (bpm), because the heart should beat slowly at rest.
Why is a very high resting heart rate dangerous?
It means the heart is working too hard, which can tire it out and lead to disease.
Name one thing that can cause a high resting heart rate.
Stress, fever, dehydration, too much caffeine, or heart problems.
Why do doctors check your resting heart rate?
To see if your heart is healthy or working too hard.
Quick recap
Normal resting heart rate is 60–100 bpm.
A very high resting heart rate means the heart is working too hard.
It can be caused by stress, illness, or heart problems.
