One of the most compelling studies on this topic tracked over 600 patients who had been hospitalized for acute coronary syndrome—a condition that includes heart attacks and unstable angina—and found that those who engaged in regular moderate to vigorous exercise had 50 to 60% fewer recurrent heart attacks or cardiac events over the following year compared to those who remained sedentary .
What’s more, the research found that it wasn’t just about the total amount of exercise—it was about avoiding prolonged sedentary time. Those who spent more than 10 hours a day sitting or remaining still had a significantly higher risk of experiencing another cardiac event. Replacing just 30 minutes of sedentary time with exercise or even sleep lowered the risk of a recurring cardiac event .
How Much Exercise Do You Need?
Federal health authorities and cardiologists alike recommend at least 150 minutes of moderate-intensity aerobic physical activity per week for adults . This can be broken up in several ways:
30 minutes a day, 5 days a Week
25 minutes of vigorous activity, 3 days a week
A combination of moderate and vigorous activity
Even short “exercise snacks” lasting a few minutes, accumulated throughout the day
Dr. Laffin emphasizes that the benefits grow with even more exercise, and studies have shown that weekend-only workouts provide similar health benefits to more frequent shorter workouts .
One study found that the highest mortality rate was observed among participants with the lowest physical activity volume (less than 500 MET-minutes per week), while lower mortality rates were observed across higher activity volumes, with the lowest risk among participants with the highest volume .
The Role of Strength Training: A Powerful Companion
