While many people believe this, there has been little actual evidence.
Canadian researchers reviewed the records of 500 patients with heart problems over two winter seasons.
Of those patients , 7 percent started experiencing heart symptoms while shoveling snow.
Doctors say 7 percent of anything in medicine is a significant proportion.
Researchers also identified three main factors that put people at risk: Being male, having a family history of premature coronary artery disease and smoking.
The study was published in the journal Clinical Research in Cardiology.
