(Starts @ the 04:57 Minute Mark) Power Flow is a step up from our regular Flow class. It incorporates more challenging postures such as creative standing poses, arm balances and inversions. Modifications and variations are offered for all poses so that the intensity and challenge is up to you. Power Flow is a step up from our regular Flow class. It incorporates more challenging postures such as creative standing poses, arm balances and inversions. Modifications and variations are offered for all poses so that the intensity and challenge is up to you.