"I'm coming to your class today!” texted my sister, Jen, one morning. “Please don't teach Parsvakonasana." She and I agree on many things. But Utthita Parsvakonasana (Extended Side Angle) is not one ...

Add Yahoo as a preferred source to see more of our stories on Google. If you’re looking to sculpt some killer abs and increase your core strength, you might first turn to crunches. Hey, it’s a habit.