India, Feb. 1 -- Heart disease is often thought to affect only older adults or those with unhealthy lifestyles, but that's not always the case. Even people who exercise regularly, maintain a balanced diet, and avoid smoking or alcohol can develop serious heart conditions without warning.

Dr Syed Akram Ali, an interventional cardiologist and certified heart failure specialist, shares a surprising case of a 37-year-old Hyderabad man who ran 5 km daily, avoided smoking and alcohol, yet ended up needing 2 heart stents. (Also read: Anant Ambani's fitness trainer showcases 'ancient Hindu warrior yoga' to loosen stiff hamstrings and lower back )

"Running 5 km every morning, avoiding junk food, not smoking or drinking, and sleeping on time, thi...