CrossFlowX™: Astavakrasana Cardio Flow. 34 minutes. Open, strengthen, and mobilize. In this cardio flow, you will heat up, open your hamstrings and hips, strengthen your core, arms, shoulders, glutes, and full body. It's not about the pose ever, it's always about the journey. So, whether or not you have any interest in giving Astavakrasana (aka 8-angle arm balance) a whirl, this flow packs a solid amount of strength and opening.