India, Nov. 25 -- Running in polluted air can be like smoking a pack of cigarettes, so it is safer to run indoors or postpone your workout when the Air Quality Index (AQI) is high. But if you must run outside, should you do so early in the morning? Also read | Cardiologist says 'air pollution literally hardens your arteries', explains what causes 'higher risk of heart attack'

In an interview with HT Lifestyle, Dr Ramkishan Nag, consultant, surgical oncology, HCG Cancer Centre, Borivali, warned against it. According to him, early morning runs, a favourite among fitness enthusiasts, can be particularly hazardous due to stagnant air and high pollution levels.

He said, "An early morning run is seen by many Indians as the pinnacle of fitness...