What is your target heart rate?
Usually, this is a heart rate (pulse) of 60%-80% of your maximum heart rate. You gain the most benefits when you exercise in your ''target heart rate zone.''
In some cases, your doctor may lower your target heart rate zone to begin with 50%. You may need to gradually build up to a level within your target heart rate zone, especially if you haven't been exercising regularly. If it feels too hard, slow down.
From: Your Heart Rate
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