What Is Cardio? How It Works, Benefits, and Types of Exercises

Many people think cardio must involve running fast or exercising until they are out of breath. In fact, simple activities like brisk walking can also improve cardiovascular fitness if done at the right intensity.

So, what is cardio, and how does it affect your health? During exercise, the heart pumps blood faster, the lungs help meet the body's oxygen needs, and the muscles use oxygen to support energy production while moving.

However, exercise intensity and duration still need to be adjusted to your body's ability. Let's understand the scientific definition of cardio, how it works, its benefits, and the right exercise guidelines to get started.

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title: Key Points:
- Cardio is physical activity that increases heart and respiratory work to meet the body's oxygen needs while moving.
- The mechanism of cardio involves the heart, lungs, blood vessels, and muscles in the process of transporting oxygen and producing energy.
- Cardio exercise helps improve cardiorespiratory fitness, maintain metabolic health, manage weight, and support mental health.
- Types of cardio exercise include brisk walking, jogging, cycling, swimming, aerobics, jump rope, and HIIT.
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What Is Cardio?

Cardio is physical activity that involves repetitive muscle work and increases the body's need for oxygen and energy. The term cardio comes from cardiovascular, which relates to the heart and blood vessels, while aerobic exercise involves the use of oxygen in the energy production process.

Examples of cardio exercises include brisk walking, jogging, cycling, swimming, and dancing. Although the intensity varies, these activities help train the body's ability to supply and use oxygen while moving.

Cardio does not always mean running until exhaustion or doing high-intensity exercise. Walking at a pace that increases your heart rate and breathing also counts as cardio exercise if done regularly according to your body's ability.

Read also: Physical Fitness: Benefits, Components, and Exercises!

How Does Cardio Work in the Body?

1. The Heart Pumps Blood Faster

As activity intensity increases, the heart rate rises to meet the muscles' needs. Blood carries oxygen and nutrients to the body's tissues.

The heart also helps transport carbon dioxide and metabolic waste. These substances are then processed or eliminated through the body's systems.

2. The Lungs Increase Gas Exchange

During exercise, breathing becomes faster and deeper. This helps meet oxygen needs and expel carbon dioxide.

Gas exchange takes place in the alveoli, which are small air sacs in the lungs. Oxygen enters the blood, while carbon dioxide is expelled when you exhale.

3. Muscles Use Oxygen to Produce Energy

Muscles need adenosine triphosphate (ATP) as an energy source to contract. The body continuously produces ATP so that movement can continue.

In aerobic activity, oxygen helps cells produce ATP from carbohydrates and fats. This process supports the muscles during physical activity.

4. The Body Adapts to Regular Exercise

Consistent cardio exercise helps the body use oxygen more efficiently. This adaptation makes the cardiovascular system work more effectively during activity.

The heart can pump more blood with each beat. Muscles also become more efficient at utilizing oxygen during exercise.

Read also: What Are Some Cardio Exercises? Here Are 15 Options to Try!

What Is the Difference Between Cardio and Aerobic Exercise?

The terms cardio and aerobic are often used interchangeably because they share many similarities. However, there are several differences between the two, including:

It is important to understand that cardio exercise is not always fully aerobic. High-intensity activities, such as sprinting or intense intervals, also use the anaerobic energy system to a greater extent.

Read also: Calisthenics vs. Cardio Exercise, Which Is More Effective?

Cardio Benefits for Health

Cardio exercise not only helps improve fitness but also supports overall health. Here are 5 cardio benefits you can gain if done regularly and balanced with a healthy lifestyle:

1. Improves Heart and Lung Health: Cardio exercise helps improve the body's ability to supply and use oxygen during activity.
2. Improves Stamina and Body Endurance: Regular cardio helps the body maintain physical activity for longer without getting tired easily.
3. Helps Manage Weight: Cardio increases energy expenditure, which can support weight management when combined with a balanced diet.
4. Supports Mental Health and Sleep Quality: Cardio activity can help improve mood, manage stress, and support sleep quality.
5. Helps Maintain Metabolic Health: Cardio exercise can support insulin sensitivity and help keep metabolic risk factors under control.

Read also: 10 Cardio Benefits for Health and Body Fitness

Types of Cardio Exercises You Should Know

1. Walking and Brisk Walking

Walking is suitable for beginners because it is easy to do without special equipment. To increase intensity, speed up your pace until your breathing increases, but you can still talk.

Start with a short duration according to your body's ability. Gradually increase speed and duration as your fitness improves.

2. Jogging and Running

Jogging and running help improve cardiorespiratory endurance at different intensities. Choose a pace according to your fitness level and body's ability.

Beginners can combine walking with short jogs. Gradually increase duration and speed so the body can adapt.

3. Cycling

Cycling can be done outdoors or using a stationary bike. This activity trains body endurance with relatively low impact on the joints.

Adjust speed and resistance according to your ability. Start with light to moderate intensity before increasing exercise load.

4. Swimming

Swimming involves many muscle groups while training heart and lung fitness. Water buoyancy also helps reduce the load on the joints.

Choose a swimming style according to your ability and gradually increase duration. Make sure you swim in a safe area with adequate swimming skills.

5. Aerobics

Aerobics combines repetitive movements to music to increase heart rate. This activity also trains coordination and makes exercise more enjoyable.

You can join a class or practice at home. Choose movements according to your ability so that exercise remains comfortable and controlled.

6. Jump Rope

Jump rope helps train coordination, balance, and cardiorespiratory endurance. The repetitive movement requires body control and a good landing.

Start with short intervals interspersed with rest. Use a suitable mat and maintain landing technique to reduce the risk of injury.

7. HIIT or High-Intensity Interval Training

HIIT combines high-intensity exercise with recovery breaks or light activity. This method allows for intensive exercise in a relatively short time.

Beginners should build a basic fitness level before trying high-intensity HIIT. Start with simple movements, rest enough, and gradually increase intensity.

Read also: 10 Cardio Exercises for the Heart and How to Do Them

How to Get Started with Cardio Exercise for Beginners?

Starting cardio exercise does not have to be complicated or immediately intense. Here are some steps you can take to start cardio exercise safely, effectively, and according to your body's ability:

1. Choose a suitable activity: Start with brisk walking, stationary cycling, or swimming according to your ability and body condition.
2. Start with light to moderate intensity: Perform a warm-up, maintain a comfortable pace, then end the exercise with a gradual cool-down.
3. Increase duration gradually: Add time or exercise frequency little by little according to your ability and body recovery.
4. Maintain consistency and recovery: Set a realistic exercise schedule and get enough sleep, nutrition, and hydration to support recovery.

Complete your cardio workout with SVRG equipment designed to support regular exercise with good quality and durability. Choose the equipment below that suits your needs so that exercise feels more comfortable and consistent:

How Long Should Cardio Be Done?

Cardio duration should be adjusted to your fitness level and ability to maintain a routine. As a general guideline for adults, the WHO recommends 150–300 minutes of moderate-intensity aerobic activity or 75–150 minutes of high-intensity activity per week, or an equivalent combination.

If you are just starting to exercise, you do not need to reach that target immediately. Start with realistic short sessions, then gradually increase duration and frequency according to your body's response.

Exercise can be divided into several sessions throughout the week to make it easier to do consistently. In addition to cardio, adults are also advised to do muscle strengthening exercises involving major muscle groups at least two days a week.

Read also: This Is How to Do Cardio Without Equipment, A Must-Try at Home!

Build Stamina and Fitness through Cardio Exercise

Cardio helps improve heart and lung fitness, maintain stamina, and support overall health. By choosing the right activity and intensity, you can gain its benefits without always having to exercise intensely.

Start with a realistic duration and gradually increase intensity according to your body's ability. In addition to consistency, comfortable equipment can also support exercise so that it feels more optimal.

To support your cardio routine at home, you can explore the best cardio equipment from SVRG, including treadmills for walking or running. Choose equipment according to your needs so that you can more comfortably build an active daily habit.

[[svrg_faq]]
title: FAQ about What Is Cardio
- q: What is cardio in exercise?
a: Cardio is physical activity that increases heart and respiratory work to meet the body's energy needs. Examples include brisk walking, jogging, cycling, and swimming.
- q: Is cardio the same as aerobic?
a: Both are closely related, but they are not exactly the same in terms. Cardio refers to exercise for heart and circulatory fitness, while aerobic refers to the energy production process that uses oxygen.
- q: Can cardio help with weight loss?
a: Yes, cardio increases energy expenditure, so it can support weight loss if accompanied by a suitable diet and healthy lifestyle habits. Results are influenced by energy balance, consistency, and each individual's condition.
- q: How many minutes of cardio is ideal for beginners?
a: Beginners can start with short sessions according to their ability, then gradually increase duration. The long-term target for adults is 150–300 minutes of moderate-intensity activity or 75–150 minutes of high-intensity activity per week.
- q: Which is better, cardio or weight training?
a: Both have different benefits and complement each other. Cardio primarily supports cardiorespiratory fitness, while weight training helps increase strength and maintain muscle mass, so a combination of both can support overall fitness.
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