CrossFlowX™: Ease In Effort Cardio Edition Express. 35 minutes. Finding ease in effort has the ability to change your life on every level, everywhere. This cardio packed flow helps you practice that, and practice endurance. You can do anything for one breath. You can do anything for one minute. One step at a time, you can do anything. Practice that now. Want more? We also have a full length / 50 minute version. Deep breaths, and enjoy all that ease!