<s>[INST] I have exercised my entire life. I am 61 now. I have noticed often in recent years my heart rate afte exercising will become very pronounced and deliberate. It usually lasts for a minute or so and then subsides. Does this sound like anything you might be familiar with? [/INST] Thanks for your question on Chat Doctor. I can understand your concern. Some degree of tachycardia (rapid heart rate) is acceptable. But if tachycardia is severe after exercise then we should definitely rule out heart diseases like coronary artery disease (CAD). So get done ECG, 2d echo and stress test (trade mill test). If all these are normal then no need to worry about heart diseases and rapid heart rate. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>