Please choose the correct ending to complete the given sentence: Health: [header] How to stop your joints from cracking and popping [title] Stretch your neck gently to promote spinal health. [step] If you frequently experience a creaky neck, try facing forward, then tilt your head to the left and bring your ear close to your shoulder. Hold the stretch for 30 seconds, then repeat on the other side.

Ending1: [title] Consult your doctor if you have serious spinal arthritis. [step] If you have a neurological condition, or if your joints are prone to cracking while you sleep or exercise, you should consult your doctor to ensure that you have all the necessary information to deal with this problem. Ending2: [substeps] You can also make this stretch for your hips, elbows, or back, which are often sensitive. [title] Use the techniques described in method one for a four-hour routine. Ending3: [substeps] After tilting your head to each side, face forward, then slowly turn your head to the left as far as you comfortably can. Hold it for 30 seconds, then turn slowly to the right and repeat the stretch on that side. Ending4: [title] Start with stretches that target your neck. [step] Deep breathing exercises are good for relieving tension in your neck, as well as relieving headaches.

Answer format: ending1/ending2/ending3/ending4