Plank (Chaturanga Dandasana)
From Lunge pose, slide your left foot back about six inches so that it is in line with your right foot. Press the balls of both feet down onto the floor and engage your thigh and abdominal muscles. Lift your sternum and lengthen your arms straight out in front of your chest, flexing your hands at the wrists. Exhale as you hinge forward from your hips, and press your hands against an imaginary wall in front of you.