Begin on all fours in tabletop position (wrists underneath shoulders and knees underneath hips). Pull your abdominal muscles into your spine. Keeping your back and pelvis stable, reach your right arm forward and extend your left leg back. Hold for 5 seconds, ensuring your pelvis does not rock from side to side. Return to the starting position. Lift your left arm forward and extend your right leg back. Hold for 5 seconds and return to the starting position again. Repeat for 60 seconds or as desired.