Your target heart rate is one of the most useful tools for exercising safely and effectively. It tells you how hard your heart is working during physical activity — and whether you are pushing yourself just enough, too little, or too much. In this article, you will learn how to calculate your personal target heart rate, what the numbers mean, and how to use this information to improve your fitness and protect your heart health.
What Is Target Heart Rate and Why Does It Matter?
Your heart rate is simply the number of times your heart beats per minute. During exercise, your heart works harder to pump oxygen-rich blood to your muscles. The more intense the activity, the faster your heart beats.
Your target heart rate is a range — not a single number. Exercising within this range means your workout is effective without putting too much strain on your heart. Staying within your target zone helps you build cardiovascular fitness, burn calories, and improve your overall health.
According to Health Canada, regular physical activity is one of the most important things Canadians can do for their long-term health. Knowing your target heart rate helps you make every workout count.
Understanding Your Maximum Heart Rate
Before you can find your target heart rate, you need to know your maximum heart rate. This is the highest number of beats per minute your heart can safely reach during intense exercise.
The most widely used formula is simple: subtract your age from 220. For example, a 40-year-old would have an estimated maximum heart rate of 180 beats per minute (220 − 40 = 180).
It is important to understand that this is an estimate. Your true maximum heart rate can vary based on your fitness level, genetics, and overall health. However, this formula gives you a reliable starting point for planning your workouts.
What About Resting Heart Rate?
Your resting heart rate is how many times your heart beats per minute when you are completely at rest. For most healthy adults, a normal resting heart rate falls between 60 and 80 beats per minute.
The best time to measure your resting heart rate is first thing in the morning, before you get out of bed. Sit or lie quietly for a few minutes, then count your heartbeats for 60 seconds. You can also count for 30 seconds and multiply by two.
A lower resting heart rate generally means your heart is working more efficiently. Highly trained athletes often have resting heart rates as low as 40 to 50 beats per minute. If your resting heart rate is consistently above 100 beats per minute, speak with your family doctor.
How to Calculate Your Target Heart Rate
The most accurate method for finding your target heart rate is called the Heart Rate Reserve method, sometimes called the Karvonen formula. It takes both your maximum heart rate and your resting heart rate into account.
Here are the steps to follow:
Step 1: Calculate your maximum heart rate. Subtract your age from 220.
Step 2: Measure your resting heart rate. Count your beats per minute first thing in the morning.
Step 3: Subtract your resting heart rate from your maximum heart rate. This gives you your Heart Rate Reserve.
Step 4: Multiply your Heart Rate Reserve by your desired exercise intensity (for example, 0.60 for 60% intensity, or 0.85 for 85% intensity).
Step 5: Add your resting heart rate back to this number. The result is your target heart rate for that intensity level.
A Worked Example
Let’s say you are 35 years old with a resting heart rate of 68 beats per minute. You want to exercise at 70% intensity.
Maximum heart rate: 220 − 35 = 185 bpm
Heart Rate Reserve: 185 − 68 = 117 bpm
117 × 0.70 = 81.9
81.9 + 68 = approximately 150 bpm
Therefore, your target heart rate at 70% effort would be roughly 150 beats per minute. This is a solid, moderate-to-vigorous training zone for most healthy adults.
Target Heart Rate Zones Explained
Not every workout should feel the same. Different intensity levels serve different fitness goals. Understanding heart rate zones helps you train smarter, not just harder.
Most fitness experts and health organisations divide exercise intensity into the following zones based on your target heart rate:
Light Intensity: 50–60% of Maximum Heart Rate
This zone is ideal for warm-ups, cool-downs, and active recovery days. It feels easy and comfortable — like a gentle walk. This level of activity still offers real health benefits, especially for beginners or those returning to exercise after an illness or injury.
Moderate Intensity: 60–70% of Maximum Heart Rate
This is often called the “fat-burning zone.” Your body uses a higher proportion of fat as fuel at this intensity. You can hold a conversation, but you are breathing a little harder than normal. This zone is great for building a base level of fitness and is suitable for most Canadians looking to improve their general health.
Vigorous Intensity: 70–85% of Maximum Heart Rate
At this level, exercise feels challenging. You can speak only in short sentences. This zone strengthens your cardiovascular system more quickly and improves endurance. However, it requires a reasonable level of baseline fitness before you attempt it regularly.
High Intensity: 85–95% of Maximum Heart Rate
This zone is used in high-intensity interval training (HIIT) and competitive sport. It places significant demand on the heart and muscles. This intensity is best suited to trained athletes or people working under direct supervision from a fitness or health professional. As a result, most everyday exercisers do not need to reach this zone.
For a detailed breakdown of exercise intensity guidelines, visit the Mayo Clinic’s guide to exercise intensity.
How to Measure Your Heart Rate During Exercise
Knowing your target zone is only helpful if you can actually measure your heart rate while you work out. Fortunately, there are several easy ways to do this.
Manual Pulse Check
You can feel your pulse at two main points on your body. The first is on the inside of your wrist, just below the base of your thumb — this is the radial artery. The second is on the side of your neck — this is the carotid artery.
If you check your pulse at the neck, use only one side at a time. Never press both sides of the neck simultaneously. Pressing both carotid arteries at once can reduce blood flow to the brain and cause dizziness or fainting.
To measure manually, count the beats for 15 seconds and multiply by four. This gives you your beats per minute.
Fitness Trackers and Smartwatches
Many Canadians now use wearable devices to track their heart rate in real time. Devices like fitness bands and smartwatches use optical sensors on the wrist to estimate heart rate continuously. While not perfectly precise, they are generally accurate enough for everyday fitness tracking and are a convenient option for most people.
Chest Strap Heart Rate Monitors
Chest straps are the gold standard for heart rate accuracy during exercise. They detect the electrical signals from each heartbeat directly. In addition, many chest straps sync wirelessly with gym equipment, smartphones, and fitness apps. These are particularly useful for those doing structured training programmes.
Tips for Exercising Safely Within Your Target Zone
Understanding your target heart rate is just the beginning. Here are some practical tips to help you exercise safely and effectively as a Canadian adult.
Start slow: If you are new to exercise, begin in the 50–60% zone and gradually build up over several weeks.
Warm up and cool down: Give your heart time to adjust by spending 5–10 minutes at a lower intensity before and after each session.
Stay hydrated: Dehydration raises your heart rate. Drink water before, during, and after exercise.
Listen to your body: Numbers are a guide, not a rule. If something feels wrong, stop and rest.
Be consistent: Regular moderate exercise, done consistently over time, provides far greater benefits than occasional intense sessions.
Account for medications: Some heart medications, including beta-blockers, lower your heart rate. If you take these, the standard formulas may not apply to you. Ask your doctor or pharmacist for personalised guidance.
The World Health Organization’s physical activity guidelines recommend at least 150 minutes of moderate-intensity activity per week for adults. Using your target heart rate helps ensure that time is well spent.
When to See a Doctor
Most healthy Canadians can start a moderate exercise programme without needing medical clearance. However, there are situations where checking in with your family doctor or visiting a walk-in clinic first is strongly recommended.
Speak with a healthcare provider before starting a new exercise routine if you:
Have been diagnosed with a heart condition, high blood pressure, or diabetes
Are over 45 years old and have been inactive for a long time
Experience chest pain, shortness of breath, or dizziness during or after activity
Notice your heart racing or beating irregularly at rest or during light activity
Take prescription medications that affect your heart rate or blood pressure
Are recovering from a recent illness, surgery, or injury
Your family doctor can run a basic heart health assessment and may refer you to a cardiologist or a supervised cardiac rehabilitation programme if needed. Many provincial health plans in Canada cover these referrals. Walk-in clinics are also a good option if you need a quick health check before getting started.
Remember: this article provides general health information only. It is not a substitute for personalised medical advice. Always consult a qualified healthcare provider for guidance specific to your health situation.
Frequently Asked Questions
What is a good target heart rate during exercise?
A good target heart rate during exercise depends on your age, fitness level, and goals. For most healthy adults, exercising between 60% and 85% of your maximum heart rate is considered effective and safe. Use the formula 220 minus your age to estimate your maximum heart rate, then calculate your target zone from there.
How do I calculate my target heart rate by age?
To find your target heart rate by age, start by subtracting your age from 220 to get your estimated maximum heart rate. Then multiply that number by 0.60 and 0.85 to find the lower and upper ends of your target zone. For example, a 50-year-old would have a maximum heart rate of 170 bpm and a target zone of roughly 102 to 145 bpm.
Is it safe to exercise at maximum heart rate?
Exercising at or near your maximum heart rate is generally safe only for well-trained athletes doing structured high-intensity training. For most people, spending time at maximum heart rate is unnecessary and can be risky. Staying within your target heart rate zone of 60–85% is both effective and much safer for everyday fitness.
What should my resting heart rate be?
A normal resting heart rate for healthy adults ranges from 60 to 80 beats per minute. Athletes may have resting heart rates as low as 40 bpm due to their high level of cardiovascular fitness. If your resting heart rate is consistently above 100 bpm, it is worth discussing with your family doctor.
Does target heart rate change as you get older?
Yes, your target heart rate does change with age because your maximum heart rate decreases as you get older. This is why the standard formula subtracts your age from 220 — it automatically adjusts your target zone accordingly. As a result, older adults will have a lower target range than younger adults, even at the same fitness level.
Can medications affect my target heart rate?
Yes, certain medications — particularly beta-blockers used for high blood pressure and heart conditions — can significantly lower your heart rate. This means the standard target heart rate formulas may not give you accurate results. If you take any heart or blood pressure medications, speak with your doctor or pharmacist before using heart rate zones to guide your workouts.
Key Takeaways
Your target heart rate is a personalised range that helps you exercise at the right intensity for your goals and health.
Use the formula 220 minus your age to estimate your maximum heart rate, then aim for 60–85% of that number during most workouts.
The Heart Rate Reserve (Karvonen) method gives a more precise target by also accounting for your resting heart rate.
Different exercise zones — light, moderate, vigorous, and high intensity — serve different fitness purposes.
You can measure your heart rate manually at the wrist or neck, or use a fitness tracker or chest strap monitor.
Always check with your family doctor or a walk-in clinic before starting a new exercise programme, especially if you have an existing health condition or take medications.
Consistency matters more than intensity — regular moderate exercise done week after week delivers the greatest long-term health benefits.
