What exercise measures the fitness of the heart and lungs?

Table of Contents Show

Measuring exercise intensity
Measuring exercise intensity using your target heart rate
Seeking medical advice about your target heart rate
Target heart rate chart
Measuring your heart rate by taking your pulse
Factors known to influence heart rate
Measuring exercise intensity using the talk test
Measuring exercise intensity using the exertion rating scale
Exercise intensity warning signs
Where to get help
Things to remember

Reviewed by Dan Brennan, MD on November 27, 2021

Cardiovascular endurance is a measure of how well you can do exercises that involve your whole body at moderate to high intensity for an extended time. Improving your cardiovascular endurance can make it easier for you to carry out your daily tasks. It can also lessen your risk of diseases such as diabetes, heart disease, and stroke.

You can raise your level of cardiovascular endurance by doing exercises that increase your heart and breathing rates, or aerobic exercise. According to many experts, aerobic exercise is the most important part of physical fitness. To achieve cardiovascular endurance, you should exercise aerobically 30 minutes per day, 3 to 7 days per week.

When you do aerobic exercise, your body responds in the following ways:

Your heart pumps more efficiently.
Your lungs work better.
Your blood volume and delivery system are improved.
Your resting heart rate is lowered.
Your heart pumps out more blood.
Your muscles get stronger.
Your ligaments, tendons, and bones get stronger.
Your body is more able to use fat as an energy source.

As you increase your cardiovascular endurance through aerobic exercise, you'll get stronger and fitter. You'll also reap the following benefits:

Lowered risk of disease. Aerobic exercise reduces your risk of developing many diseases, including:

Better strength and stamina. Your heart and lungs will get stronger as you exercise. You'll also gain bone and muscle fitness. You may feel tired when you first start exercising, but you'll develop stamina over time.

A more active immune system. You're less likely to catch viral illnesses such as colds and flu if you're a regular exerciser. Your immune system is activated by aerobic exercise.

Managed weight. Aerobic exercise, together with a healthy diet, can help you lose weight and keep it off.

Stronger bones. Weight-bearing aerobic exercise, such as walking, can help reduce your risk of developing osteoporosis.

Better mood. Aerobic exercise may help you relieve tension and anxiety. It may also help you relax and sleep better. For some people, exercise is as effective as antidepressants at lessening depression.

Staying independent longer. Exercising makes you stronger and can help you stay mobile longer. It can also lower your risk of falls and injuries. Fitness will improve the quality of your life as you age.

Fewer unhealthy behaviors. Time spent exercising is better than that spent smoking, drinking alcohol, or gambling. Exercise may also help regulate overeating.

Almost everyone can benefit from physical exercise. However, not every exercise is right for everyone. Talk to your doctor about the best type of exercise for you.

Start simple. If you're new to exercise, you may benefit from as little as 15 minutes of exercise. Work your way up to 30 minutes per day at least 3 days per week. Doing this should result in a measurable improvement in your cardiovascular endurance in eight to 12 weeks.

Pick something you enjoy. Aerobic exercise is any nonstop activity that uses your large muscles and makes your heart and lungs work harder. You can pick one you enjoy or rotate through many different ones. Some examples include:

Don't overdo it. Doing the same type of exercise more than 5 days per week puts you at a higher risk for injuries. If you want to work out more than 5 days per week, change it up with exercises that use different muscle groups. Do some low- and then some high-impact activities to avoid too much stress on your joints and muscles.

Gradually work up. You should aim to push yourself slightly more than your normal movement level. Bump up your speed or distance no more than 10% to 20% each week. You should feel challenged, but not completely exhausted. For every 10 minutes you exercise, add 1 or 2 minutes weekly.

Warm up, cool down, and stretch. Start by working at a low level for 5 to 10 minutes to warm up. Then gradually build up how hard you work until you reach your limit.

After you finish working at full intensity, slow down for 5 to 10 minutes before you stop. Stretch at this point, since your muscles will be warmed up.

You can measure exercise intensity using target heart rates, the talk test, or the exertion rating scale.
For maximum health benefits, the goal is to work hard, but not too hard, described as moderate intensity by Australia's Physical Activity and Sedentary Behaviour Guidelines.
If you have a medical condition, are overweight, are aged over 40 years or haven’t exercised regularly in a long time, see your doctor for a medical check-up before starting any new exercise program.

Exercise intensity refers to how hard your body is working during physical activity. Your health and fitness goals, as well as your current level of fitness, will determine your ideal exercise intensity.

Typically, exercise intensity is described as low, moderate, or vigorous. For maximum health benefits, the goal is to work hard, but not too hard – described as moderate intensity by Australia's Physical Activity and Sedentary Behaviour Guidelines. These guidelines recommend that for good health, you should aim for at least 30 minutes of moderate intensity physical activity on most days, in addition to a general message of moving more and sitting less. This is the same for women and men.

Pre-exercise screening is used to identify people with medical conditions that may put them at a higher risk of experiencing a health problem during physical activity. It is a filter or ‘safety net’ to help decide if the potential benefits of exercise outweigh the risks for you. Ensure you read through the pre-exercise self-screening tool before you embark on a physical activity or exercise program.

Measuring exercise intensity

There are various ways to measure your exercise intensity to make sure your body is getting the most out of every workout. You may need to experiment to find out which method of measuring exercise intensity suits you best. Three different measurement methods include:

target heart rate
talk test
exertion rating scale.

Measuring exercise intensity using your target heart rate

The human body has an in-built system to measure its exercise intensity – the heart. Your heart rate will increase in proportion to the intensity of your exercise. You can track and guide your exercise intensity by calculating your Target Heart Rate (THR) range.For moderate-intensity physical activity, a person's THR should be 50 to 70 per cent of their maximum heart rate. The maximum rate is based on a person's age. An estimate of a person's maximum heart rate can be calculated as 220 beats per minute (bpm) minus your age. Because it is an estimate, use it with caution.Keep your heart rate at the lower end of your recommended range if you are just starting regular exercise. Gradually increase the intensity of your workouts as your fitness improves. Also, your heart rate should stay in the lower ranges during warm-up and cool-down periods.Using a heart rate monitor is an easy way to keep track of your heart rate while you’re exercising, or you can take your pulse (see below).

Seeking medical advice about your target heart rate

If you have a medical condition, are overweight, are aged over 40 years or haven’t exercised in a long time, see your doctor for a medical check-up before starting any new exercise program. Your heart rate target range may need to be professionally recalculated to take your health and general fitness into account.Some medications can alter your heart rate response to exercise, so make sure you discuss the medications you are taking and how they could affect your exercise plans with your doctor. It may be necessary to use another option for monitoring exercise intensity if you are taking certain medications.

Target heart rate chart

Age (years)	Target range (50 – 70% of maxHR) heart beats per minute
20	100 – 140
25	98 – 137
30	95 – 133
35	93 – 130
40	90 – 126
45	88 – 123
50	85 – 119
55	83 – 116
60	80 – 112
65	78 – 109

Measuring your heart rate by taking your pulse

Taking your pulse at regular intervals lets you know whether you are exercising within your target heart rate range. Some tips include:

Take your pulse before you warm up.
Take your pulse again when you’ve been exercising for about 5-10 minutes.
Continue taking your pulse at regular intervals.

The radial pulse is located on your inner wrist. To measure it, you should:

Put the first three fingers of one hand against the inner wrist of the other hand just below the thumb.
Lightly press your fingers into the hollow next to the tendon on the thumb-side – your artery lies just beneath the skin.
Using a watch with a second hand, count your pulse for 15 seconds. Multiply this figure by four to get your beats per minute. (For example, 31 pulse beats over 15 seconds equals a pulse rate of 124 beats per minute.)

You can also take your pulse by pressing your fingers lightly against one of your carotid arteries, located on either side of your windpipe.

Factors known to influence heart rate

It’s not just exercise that affects your heart rate. Your beats per minute could be raised by a number of internal and external factors including:

hot weather
caffeine intake
time of day
hormone fluctuations
stress or anxiety
cigarette smoking
medications.

Measuring exercise intensity using the talk test

The talk test is a simple and reliable way to measure intensity. As a rule of thumb:

If you can talk and sing without puffing at all, you’re exercising at a low level.
If you can comfortably talk, but not sing, you’re doing moderate intensity activity.
If you can’t say more than a few words without gasping for breath, you’re exercising at a vigorous intensity.

Measuring exercise intensity using the exertion rating scale

This method is based on observing your body’s physical signs during physical activity, including increased heart rate, increased respiration or breathing rate, increased sweating, and muscle fatigue. To keep within a moderate intensity, aim to experience the exercise signs 3–7 in the chart below.You can keep a diary of your exertion ratings to monitor your fitness progressions. As you become fitter, the same activity will become easier and your exertion rating will decrease. Then you’ll know it’s time to increase your effort.

Level	Exertion	Physical signs
0	None	None
1	Minimal	None
2	Barely there	Sensation of movement
3	Moderate	Stronger sensation of movement
4	Somewhat hard	Warmth or light sweating
5	Hard	Sweating
6	Harder	Moderate sweating
7	Very hard	Moderate sweating, but can still talk
8	Extremely hard	Heavy sweating, can't talk
9	Maximum effort	Very heavy sweating, can't talk
10	Maximum effort	Exhaustion

Your body’s response to moderate intensity exercise normally includes:

faster heart rate
faster breathing
feeling warmer
slight swelling of the hands and feet
mild to moderate perspiration
mild muscular aches for a day or two afterwards, if you are not used to the physical activity.

Becoming aware of the intensity of your exercise will help you to ensure that you exercise at the right intensity to achieve your health or fitness goals. For maximum health benefits, you should aim for moderate-intensity activity.

Exercise intensity warning signs

If you experience any of the following symptoms, stop exercising and seek medical help:

extreme breathlessness
breathing problems such as wheezing or coughing
chest pain or pressure
extreme perspiration
dizziness or fainting
severe muscle pain or cramps
nausea
severe pain in any muscles or joints
extreme and long-lasting fatigue after exercising.

Where to get help

Your doctor
Exercise physiologist
Physiotherapist
Fitness professionals

Things to remember

You can measure exercise intensity using target heart rates, the talk test, or the exertion rating scale.
For maximum health benefits, the goal is to work hard, but not too hard, described as moderate intensity by Australia's Physical Activity and Sedentary Behaviour Guidelines.
If you have a medical condition, are overweight, are aged over 40 years or haven’t exercised regularly in a long time, see your doctor for a medical check-up before starting any new exercise program.

High blood pressure (hypertension), 2014, Mayo Clinic, USA. More information here.
Measuring physical activity intensity – target heart rate and estimated maximum heart rate, 2015, Centers for Disease Control and Prevention, More information here.

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