Shovelling: how to protect the heart

One of the few statistically meaningful epidemiological studies on the link between snow events and the risk of myocardial infarction (MI) found that the number of MIs increases on snowstorm days, mainly in men.[3] However, it is not known whether this is because men shovel more or because women do it more safely.

It is important to note that the study does not establish a direct link between shovelling and MI, but the authors believe that shovelling after a snowstorm is one of the most plausible causes of MI. Surprisingly, the increased risk of MI during snowstorms was not associated with age or identified cardiovascular risk factors.

Exposure to cold temperatures also affects the cardiovascular system, as the body needs more energy and oxygen to maintain body temperature, which puts more stress on the heart and arteries. When cold is combined with exercise, the cocktail can prove even more harmful.

Exposure to cold air causes blood vessels to constrict, thereby preventing heat loss. As noted above, this can cause plaque on the artery walls to rupture, resulting in a heart attack. In addition, cold tends to raise the level of fibrinogen, a protein that promotes blood coagulation and can cause clots that lead to a heart attack.[4]

A number of studies have linked exposure to cold temperatures to an increase in heart disease (angina, arrhythmia) and a greater risk of myocardial infarction. For example, a Swedish study showed a higher incidence of myocardial infarction at temperatures below 0 °C,[5] while British researchers estimated that each 1 °C drop below a certain temperature increases the risk of myocardial infarction by 2% in the following 28 days.[6]

Although it can sometimes cause discomfort and injury, shovelling offers numerous benefits. Like any other physical activity, it is good for improving your mood and physical fitness, not to mention burning a few calories. To limit the risks associated with this winter activity and to protect your heart, make sure to take a few precautions.

Before you start shovelling, do a warm-up exercise by going for a walk or jumping up and down.

1. Avoid shovelling after eating and drink water regularly.
2. Take small shovelfuls and avoid throwing the snow too high. Pushing it takes less effort.
3. Reduce your pace or stop altogether if you feel out of breath. You should be able to talk while shovelling.
4. Watch for signs of discomfort and stop all activity if pain persists.

Heart attack: What to look out for?

Here are some of the symptoms of a heart attack:[7]

• Pain in the chest, which may be accompanied by a sensation of discomfort, tightness, pressure, heaviness, bloating and burning
• Pain that radiates out from the chest
• Pain in the upper body: neck, jaw, shoulders and arms
• Shortness of breath
• Paleness, sweating and overall weakness
• Nausea, vomiting and sometimes indigestion
• Fear and anxiety

We offer services that can help your doctor diagnose heart problems and related health conditions, and determine the appropriate treatment. 

• Cardiac ultrasound
• Electrocardiogram
• HS Troponin T

Vous avez une ordonnance médicale en main pour une infiltration? Prenez rendez-vous en ligne ou joignez le service à la clientèle de Biron Groupe Santé au 1 833 590-2712.