Zone 2 cardio is the latest exercise trend, and it's based on the longstanding notion that keeping your heart rate within a specific range can help you get more out of a workout.

The Karvonen Formula measures your estimated target heart rate zone. Medindia uses this standard formula in its calculation. Should I consult my doctor before starting a fitness programme?

Cardiovascular exercise helps strengthen your heart, allowing it to pump blood more efficiently and improving blood flow to all parts of your body.

Start slowly. If you’re beginning an exercise program, aim for the lower end of your target heart rate zone, and then gradually build up intensity. If your heart rate is too high, take it easier.

Struggling to stay in zone 2 on your runs? Learn how to find your real heart rate range and why it matters for marathon training.

Our experts have looked at zone 2 cardio to find all the pros and cons. Here's what you should know.

Your heart rate, or pulse, is the number of times your heart beats per minute. Your resting heart rate is when the heart is pumping the lowest amount of blood you need because you’re not exercising.

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DEAR MAYO CLINIC: When I go for a walk or to the gym, people always seem to be checking their pulse, whether by hand or with a wearable. Why is heart rate so important?