It depends on how you exercise. Don't pack too much. Normal fitness plus a small amount of weight will not make your heart muscle bigger. Exercise will enhance the endurance of the heart. But if you have high blood pressure at the same time, you should pay attention. People with high blood pressure may have myocardial hypertrophy when exercising.

If your intensity is too high, you will be in danger of heart muscle enlargement like an athlete. Control it. Normal people should exercise moderately. For the purpose of fitness, not torture yourself.