Shoveling snow can be particularly dangerous due to several reasons:

1. Cardiovascular Risk: Shoveling is a demanding cardiovascular activity, similar to a strenuous workout. It can raise your heart rate and blood pressure dramatically, especially in cold temperatures, which naturally cause arteries to constrict. This can lead to an increased risk of heart attack, particularly in those with pre-existing heart conditions or who lead a sedentary lifestyle.
2. Cold Temperatures: The cold environment adds extra strain on the body. Cold air makes it harder to breathe, which can be especially challenging for those with respiratory issues. Also, the body’s response to cold can exacerbate the cardiovascular strain.
3. Physical Strain: Snow shoveling is physically demanding and can lead to muscle strains, particularly in the back and shoulders. Lifting heavy snow, especially wet, heavy snow, can lead to overexertion.
4. Risk of Slips and Falls: Snowy and icy conditions increase the risk of slips and falls, which can lead to serious injuries such as fractures.
5. Hypothermia and Frostbite: Prolonged exposure to cold while shoveling can lead to hypothermia and frostbite, especially if you are not properly dressed for the conditions.
6. Dehydration: People often forget to hydrate in cold weather, but shoveling snow is a vigorous activity that can lead to dehydration.

For these reasons, it’s important to take precautions when shoveling snow, such as using proper technique, taking breaks, staying hydrated, dressing warmly, and not overexerting oneself. Those with known heart or respiratory issues should be particularly cautious and consider seeking assistance or using a snow blower instead.