Dr. Shannon discusses the research behind how much high-intensity cardio is good for you and how much could be negative for your health. She discusses how exercise can either aid in improving insulin sensitivity or reduce insulin sensitivity and the consequences to your overall health and fitness. Shannon provides a framework for how to implement cardio based on your body's needs. 0:40  What Types of Exercise are Typically Considered Cardio? 3:33  Focus on HIIT Cardio 4:16  What is Mitochondria? 5:57  What is Insulin Resistance? 8:54  The Upper Limit of HIIT (How much is too much?)10:40  Neuromuscular Adaptation14:55  Overuse of Your Muscles 16:35  Short Intense Exercise vs Longer Gentle Workouts 20:04  What the Right Amount for You?23:10  Why Cardio Has Been Recommended For Weight Loss 26:36  A Framework For How Much Cardio to Add Into Your Routine