Medically reviewed by Waseem Chaudhry, MD

That first blast of winter air might feel invigorating, but your cardiovascular system is working harder than you realize. Within seconds of stepping into freezing temperatures, your blood vessels constrict to preserve body heat, raising your blood pressure and increasing the workload on your heart. This physiological response is why heart-related emergencies increase during winter months, particularly during activities like snow shoveling.

Understanding Winter’s Impact on Your Heart

When exposed to cold air, your body redirects blood flow to vital organs to maintain core temperature. This natural response increases strain on your cardiovascular system. Cold weather also slightly thickens your blood, raising the risk of clots.

Winter activities like shoveling snow can be especially dangerous, as the combination of cold air, physical exertion and breath-holding while lifting creates a perfect storm for cardiac stress.

Stay Heart-Healthy This Season

Protect your heart with these simple precautions:

• Dress properly: Layer up when heading outdoors. Hats, gloves and scarves aren’t just for comfort—they help prevent heat loss and reduce cardiovascular strain.

• Shovel smart: Take frequent breaks and avoid overexertion. Consider using a snow blower or asking for help if you have heart disease, high blood pressure or are generally inactive. Never shovel immediately after eating or smoking.

• Adjust your exercise: Maintain your routine, but consider moving workouts indoors during extreme cold. If exercising outside, warm up longer than usual and breathe through your nose to warm the air before it reaches your lungs.

Don’t Ignore Warning Signs 

Pay attention to your body. Seek immediate medical attention if you experience: 

• Chest discomfort 

• Unusual shortness of breath 

• Dizziness 

• Excessive fatigue during cold-weather activities 

People often dismiss these symptoms as being “out of shape,” but they could signal something more serious.

Keep Up with Your Routine Care

Stay current with medications and regular cardiology appointments throughout winter. Keep emergency medications accessible and ensure family members know your cardiac history. 

Winter doesn’t have to mean heightened cardiac risk. By understanding how cold affects your heart and taking appropriate precautions, you can enjoy the season safely. When in doubt, consult your cardiologist about personalized strategies for staying heart-healthy during colder months. 

Make an appointment online with a WMCHealth cardiologist or call 866.WMC.HEART.