Have students get in plank position and hold for as long as possible. Plank Position: On the floor, position the body in a straight line by propping up on elbows and toes. Make sure elbows are directly below shoulders, palms flat on the floor with fingers pointing forward and keep the body parallel to the floor (no bottoms in the air). Over time, work to hold longer. After two challenges, have students do a forward stretch and hold for 30 seconds. Forward Stretch: While standing, bend forward and reach toward toes. With practice, students will be able to get fingers closer to the floor.