This is a great exercise for abdominal region or if you have lower back problems.
Tighten up your abdominal muscles by drawing belly button away from the exercise mat and toward your spine.
Take a deep breath and as you exhale extend your left arm and your right leg as far as you can.
Keep your hips square and keep your abdominal region tight.
You can stay in this position up to 15 seconds, and do not forget to breathe freely.