Hello,
When I do cardio my heart rate climbs twice to about 150-160bpm. People say that it’s actually good for your health and well being of heart. How does making the heart work twice as fast help it instead of hurting it?
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Because your heart is a muscle, and what you’re doing is working it out. A healthy heart benefits from exercise the same way your arms and legs do. Working out *does* put extra strain on it, but if you do it regularly in a safe way, it’ll get used to it and become stronger overall and have an easier time working at whatever rate it’s currently beating.
Your heart is a muscle and exercise improves its performance the same as any other.
Through cardio, your heart will become more efficient at pumping blood and your entire circulatory system will get better at oxygenating and transporting your blood throughout your body
You do big run. Heart also go boom boom. Heart realizes it’s out of shape, so it goes boom boom harder the more you run. Eventually heart get stronger, circulate more blood each pump, and boom boom less.
Imagine your heart is like a super strong and important muscle, and it works really hard to pump blood to every part of your body. Just like your legs need exercise to be strong, your heart also needs exercise to stay healthy and strong.
When you do cardio exercises, like running, jumping, or playing sports that get your heart beating faster, it’s like having a little workout for your heart. This exercise helps make your heart stronger, just like how doing exercises can make your legs stronger.
When you do cardio exercises, your heart gets better at pumping blood throughout your body. It becomes more efficient, which means it can do its job better without getting tired easily. The blood carries a lot of important things like oxygen and nutrients to all parts of your body to keep them healthy.
You know how you feel happy and energized after playing a fun game? Well, when you do cardio exercises, your body releases happy chemicals called endorphins. These endorphins make you feel good and can even help you sleep better at night.
However, it’s important to remember that doing too much exercising, especially if you’re not used to it, can be tiring for your heart. That’s why it’s always a good idea to start slowly and build up your exercise routine gradually. It’s like adding more and more fun activities to your playtime every day.
So doing cardio exercises, like running, swimming, or playing sports, is great for your heart because it helps make it stronger, keeps your body healthy, and makes you feel happy and energized.
Like other muscles, your heart will be slightly damaged when it is asked to work harder than it is used to. It will then repair the damage in a way that makes it stronger—provided you allow enough time for recovery. Over time, endurance athletes’ hearts also get bigger, particularly the left ventricle, so they can pump more blood with each stroke. (There are also diseases that can cause the left ventricle to get bigger, but when it happens due to exercise, it’s not pathological.)
The current advice from endurance experts is to do most of your cardio exercise at an easy to moderate, conversational effort—easy enough that you can speak in complete sentences. More intense efforts should be 20-30% at most of your total time. That reduces the risk of overuse injuries. It’s not your heart that is most at risk, though; it’s skeletal muscle and connective tissue, especially at joints.
One study recently claimed that too much exercise was bad for the heart, [but the data don’t support that claim](https://www.outsideonline.com/2405907/extreme-exercise-heart-health-study).
All these comments are true, but they are ignoring the most important thing: by default, your heart isn’t working at its max capacity, but at a lesser capacity. This means that it can easily work twice as much as it normally does, without straining.
So something you may be missing…. is that it DOES hurt your heart.
It puts stress on your heart, just like any muscle, and too much could damage it.
But just like any other muscle, stressing it for some amount of time, and then resting, will cause it to strengthen, just like any other muscle.
If you have a heart condition, or your heart is already damaged, then raising it may not be recommended.
Because stressing the body tells it to shape up and make itself more efficient. Why do muscles grow? Because they’re prompted by a very specific type of stress to grow. Same deal with any cardiovascular exercise (which lifting weights absolutely is)
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