CrossFlowV: Stress Busting Flow. 30 minutes. Stress causes the hormone cortisol to be released in your body. Cortisol causes inflammation. Inflammation is the root of most illness and disease. No one wants that! Use this 30 minute flow to rid your mind and body of the toxin that is stress. Deep breaths. You can, and you will. A stress-reduced existence is 30 minutes away!