The Surprising Age When Shoveling Snow Turns Risky for Your Heart

The arrival of winter often brings picturesque scenes of snowfall, but for some, the simple act of clearing snow can pose a serious health risk. A large, two-decade Canadian study revealed a concerning trend: the incidence of sudden heart attack in men spikes by approximately 16% during and after snowfall, particularly during large storms, leading to a 34% increase in deaths. While the study did not find the same correlation in women, the risks associated with snow removal deserve careful consideration.

Why is Snow-Clearing So Dangerous?

The danger stems from the physical exertion combined with the physiological effects of cold weather. According to Barry Franklin, Ph.D., a spokesperson for the American Heart Association and director of Preventive Cardiology and Cardiac Rehabilitation at Beaumont Health in Royal Oak, MI, the average shovelful of snow weighs 16 pounds. Over a 10-minute period of shoveling at a rate of 12 lifts per minute, this adds up to lifting nearly 2000 pounds – comparable to the weight of a subcompact SUV.

Further compounding the issue, shoveling significantly elevates heart rate. Research conducted by Dr. Franklin and his team showed a shoveler’s heart rate can increase to 97% of their maximum heart rate, exceeding the exertion levels experienced during a maximum treadmill test.

Cold temperatures also play a role. When exposed to cold air, blood vessels constrict, hindering blood circulation and raising blood pressure. This added strain makes it more difficult for the heart to function efficiently.

The Unique Demands of Shoveling

Several factors make shoveling particularly hazardous. It’s a form of static exertion – the body remains in one position while performing repetitive lifting motions. This leads to sudden, substantial increases in both heart rate and blood pressure. Lifting with the arms, rather than the legs, places a greater demand on the heart. The tendency to hold one’s breath while straining exacerbates the increase in heart rate and blood pressure.

Standing still during shoveling or snow blowing causes blood to pool in the lower extremities, reducing blood flow back to the heart. The constriction of heart arteries due to cold temperatures further narrows these vessels, increasing blood pressure and limiting blood supply to the heart.

What Does Age Have to Do With It?

According to Dr. Franklin, individuals in their 20s or 30s generally haven’t developed coronary artery disease and are less susceptible to these risks. However, for those aged 45 to 50 and older, particularly those with known or hidden heart disease, or those who lead a sedentary lifestyle, snow-clearing can be very dangerous. He notes that many people are unaware they have heart disease, stating, “If you’re over 50 and grew up eating McDonald’s and Ben & Jerry’s, you probably have some heart disease — that’s just a fact.”

Individuals with diabetes or high blood pressure also face increased risk, even without experiencing prior heart-related symptoms. Dr. Franklin cautions that, in some cases, “the first and last symptom of heart disease is cardiac arrest.” While fitness levels can mitigate some risk, he emphasizes that no one is entirely immune.

Is There a Safer Way to Clear Your Driveway?

Yes. Several precautions can minimize the risks associated with snow removal. Paying a neighbour or hiring someone to clear the driveway is strongly recommended for individuals in their 70s and 80s, and for anyone with a history of heart problems or smoking. Pushing the snow, rather than lifting it, reduces strain on the heart. Dressing in layers, including a hat, gloves, and scarf, helps mitigate the effects of cold temperatures.

Avoiding heavy meals, smoking, and alcohol before and after shoveling is also advisable. Taking frequent breaks allows the heart rate and blood pressure to return to normal levels. Using an electric snow blower, while still carrying some risk, may be safer than shoveling due to the increased movement involved. Most importantly, individuals should stop immediately if they experience any pain or discomfort and seek medical attention if they suspect a heart attack.

Frequently Asked Questions

What does the Canadian study reveal about heart attacks and snow?

The study found that the incidence of sudden heart attack in men spikes by approximately 16% during and after snowfall, particularly during large storms, leading to a 34% increase in deaths.

How much weight is lifted during a typical 10-minute shoveling session?

According to research, the average shoveler lifts nearly 2000 pounds of snow in a 10-minute period, comparable to the weight of a subcompact SUV.

What is the recommended course of action for older adults or those with heart conditions?

Dr. Franklin recommends that individuals in their 70s and 80s, and those with heart disease risks, hire someone else to clear their driveway.

Considering the potential health risks, how will you approach snow removal this winter?