Celebrate National Yoga Month with a 35-minute HIIT yoga flow session. In this routine, you’ll start with yoga flow and then alternate flows with HIIT circuits to target all of your muscle groups. This full-body routine will provide you with a cooldown and make you feel more balanced and engaged. Modifications for all levels. All you need to get started are a mat and a set or two of light and medium dumbbells that feel most comfortable for you.