To perform the Single Straight Leg Dead Lift, hold the dumbbell in left hand with an overhand grip with the arm straight. Stand with feet together. Lift leg slightly so foot is just off floor. Lower the dumbbell toward the floor while raising right leg back behind. Keep your back straight and the knee of the left leg slightly bent. Keep hip and knee of lifted leg extended throughout movement. Once you feel the stretch or the dumbbell contacts floor, return to original position by raising torso while lowering lifted leg. Straighten knee of supporting leg as torso becomes upright. Repeat with dumbbell in right hand, raising the left leg behind.