If you lower your heart rate during running, you can do so by lowering your speed, correcting your posture, and improving your diet. If your heart rate is too high, you should stop running and seek medical attention. If your heart rate is too high during running, you can lower your running speed and step frequency appropriately, so that the pressure on your heart will be reduced and your heart rate will be lowered accordingly. Maintaining proper posture while running can also lower your heart rate. If the body is too tight and straight when running, it will affect the rhythm of breathing. If the body is relatively relaxed and leaning forward, breathing will be smoother and the heart rate will be lower. Improving your diet can also lower your heart rate when running. You can eat more lean meat, fresh vegetables and fruits, and supplement enough nutrients to strengthen your heart function and lower your heart rate while running.