1 - Lie flat on your back on an exercise mat with your legs straight and arms extended overhead, keeping your body in a straight line.
2 - Engage your core and simultaneously lift your right leg and your left arm off the ground, reaching your left hand toward your right foot at the top of the movement.
3 - Lower your right leg and left arm back to the starting position in a controlled manner.
4 - Immediately repeat the movement on the opposite side, lifting your left leg and right arm and reaching your right hand toward your left foot.
5 - Continue alternating sides in a rhythmic, controlled fashion for the desired number of repetitions.
6 - Keep your lower back as close to the mat as possible throughout the movement and avoid using momentum.
