The fat-burning zone is legit. At 60 to 70 percent of your maximum heart rate, the calories that your body burns are mostly calories from fat. If you go on a brisk walk for one hour, you'll likely burn between 225 and 300 calories depending on your biometrics and fitness level.
Here are three easy ways to calculate your fat-burning zone: Figure out your max heart rate (Max Heart Rate = 220 – your age). And then determine your fat-burning range, which is 60% to 70% of your max heart rate. Use a fitness app, like Wahoo Fitness, MapMyFitness, or RunKeeper, to calculate your 5 heart rate zones.
