Performing heavy physical activity in a highly emotional state more than tripled the risk. The researchers compared people's behavior in the 60 minutes before the onset of heart-attack symptoms with the same one-hour period 24 hours earlier.
The results, based on an analysis of heart-attack patients in 52 countries, were consistent regardless of other, traditional cardiovascular risk factors, such as obesity, high blood pressure and diet.
Intense physical activity and negative emotions can increase heart rate and blood pressure, which reduces the supply of blood and oxygen to the heart, the researchers said. This can cause arterial plaque to rupture and trigger an acute myocardial infarction, or heart attack.
Source: The Wall Street Journal, November 1, 2016