Study: 560-610 Minutes Exercise Needed for Major Heart Protection

Achieving the widely recommended 150 minutes of moderate-to-vigorous physical activity per week may offer only limited protection against heart attacks and strokes, according to a large-scale study. The research suggests that to gain substantially greater cardiovascular benefits, individuals might need to engage in approximately 560 to 610 minutes of exercise weekly. This translates to nearly 9 to 10 hours of consistent, brisk activity such as walking, running, or cycling.

The findings challenge the long-standing public health guidelines that typically advocate for 150 minutes of moderate-intensity aerobic activity or 75 minutes of vigorous-intensity aerobic activity per week, often combined with muscle-strengthening activities at least two days a week. While these guidelines are known to reduce the risk of various chronic diseases, including heart disease, this new study indicates that the protective effects against major cardiovascular events like heart attacks and strokes might be significantly enhanced with a much higher volume of exercise.

Researchers analyzed data from over 110,000 adults over a period of 30 years, tracking their exercise habits and incidence of heart disease, stroke, and cardiovascular disease mortality. The study, published in the Journal of the American College of Cardiology, found that individuals who met the 150-minute recommendation experienced a 20% reduced risk of cardiovascular disease compared to inactive individuals. However, those who engaged in 560 to 610 minutes of moderate-to-vigorous physical activity per week saw a 36% to 37% reduction in risk. This suggests a dose-response relationship, where more exercise yields greater protective benefits, up to a certain point.

It is important to note that the study also indicated that exceeding 10 hours of exercise per week did not appear to offer additional significant benefits for cardiovascular health, and in some cases, extremely high levels of exercise might be associated with different health considerations. The findings underscore the importance of not just meeting, but potentially exceeding, current exercise recommendations for optimal heart health. The study's authors emphasize that even moderate amounts of exercise are beneficial, and individuals should aim to be as active as possible, gradually increasing their activity levels if they are currently sedentary. The research provides valuable insights for public health messaging and personalized exercise prescriptions aimed at maximizing cardiovascular disease prevention.