Multi-choice problem: Continue writing the next sentence in this paragraph:

How to stretch for free running
Do the triangle pose in yoga.
The triangle pose delivers an excellent full body stretch. The pose also strengthens the legs and develops a strong back.

Pick from:
(I) It may also improve your, which improves your overall form and strength, and force you to move and run more comfortably. Do a the triangle pose in taekwondo.;
(II) To do the triangle pose, lie on your back on a yoga mat with your legs straight out in front of you. Allow your neck to hang out and your chest to remain vertical throughout the pose.;
(III) As you rotate your body to assume the final pose, keep you head, butt and ankle in a straight line. Repeat on either side to stretch both sides of your body.;
(IV) Work slowly and deliberately from side to side while standing with your arms up at your sides. Your hands should form a triangle with palms facing outward.;
(III)