Left quad. Right quad. Lunge. A girls indoor soccer team warms up. From the safety of their suburban stretch circle, these 16- and 17-year-olds navigate big questions and wage tiny battles with the ferociousness of a pack of adolescent warriors. New York Times theater critic Ben Brantley calls Sarah DeLappe’s extraordinary debut play “theater that keeps you on the edge of your seat.” Co-winner of the American Playwriting Foundation’s inaugural Relentless Award and a finalist for the Pulitzer Prize, the Susan Smith Blackburn Prize and the Yale Drama Series Prize. March 16 through April 22: Fridays at 8 p.m., Saturdays at 8 p.m., Sundays at 4 p.m., and Mondays at 8 p.m.; The Echo Theater Company, Atwater Village Theatre, 3269 Casitas Ave., Los Angeles, CA 90039; Fridays/Saturdays/Sundays: $34; Monday night performances are $20 in advance, and Pay-What-You-Want at the door (subject to availability); 310-307-3753; www.EchoTheaterCompany.com.