Heart rate refers to the number of beats of the heart in a calm state within one minute, also known as quiet heart rate. Fat burning heart rate refers to the number of heartbeats in one minute when the heart rate reaches 60%~90% of the maximum heart rate. Exercise in this heart rate range can make the body's fat decompose quickly, thus achieving the effect of losing weight. If you want to lose weight, it is recommended to exercise for more than 20 minutes at a time, because sugar is just consumed, and it takes 20 minutes to achieve the effect of burning fat.