Exercise is generally beneficial for heart health, but there are certain situations where physical activity can increase the risk of heart problems or even trigger a heart attack, especially if someone has an underlying health condition. Some factors that can make exercise potentially harmful to the heart include:
1. **High-Intensity Exercise**: Engaging in very intense physical activities, like running a marathon or heavy weightlifting, can put excessive strain on the heart, particularly if someone is not accustomed to such workouts or has an undiagnosed heart condition.
2. **Exercise Without Proper Warm-Up**: Starting intense exercise without adequate warm-up can shock the heart, increasing the risk of abnormal heart rhythms (arrhythmias) or heart attack.
3. **Exercising with Underlying Heart Conditions**: Individuals with coronary artery disease, hypertrophic cardiomyopathy, or other heart-related conditions should exercise with caution. Without proper supervision, exercise could trigger symptoms or serious complications.
