Why bother with cardio? This type of workout helps maintain healthy blood sugar levels1, manage cholesterol, improve circulation, promote the removal of cellular waste2, and aid with sleep3. Plus, of course, it has major heart-health benefits4 (think blood pressure management and heart disease prevention)—which is why the American Heart Association advises getting at least 150 minutes of moderate-intensity 5aerobic exercise per week, or 75 minutes of high-intensity.