We checked in with fitness instructor, dancer, and boxer Mindy Lai to demonstrate exactly how to fit high knees into your workout routine, whether it be in between sets for a quick boost of movement or within a HIIT session to challenge your cardiovascular strength. We’re sweating just thinking about it. Engaging both your upper and lower body will help to push your heart rate up, and Lai describes this movement as her “special burnout” in between rounds to keep your body moving so you get the most out of your cardio session.