Please choose the correct ending to complete the given sentence: Health: [header] How to treat sciatica with exercise [title] Try the plank exercise. [step] Many health professionals will recommend core strengthening exercises like the plank to help alleviate pain. Stronger core muscles help to support and relieve your back.

Ending1: They protect your back for long periods of time and improve your range of motion, avoiding injury. [substeps] Lie on your back with your spine straight and your feet on the floor, with your upper torso turned forward. Ending2: You can do the plank pose on your back or on your side. [substeps] Start in the plank pose on your back. Ending3: They also help keep your pelvis in a neutral alignment, decreasing compression of the nerves. [substeps] Lie face-down on a soft surface, such as an exercise mat. Ending4: One good example of a plank exercise is the plank barbell. Grab the barbell and bring it close to your torso, knees and stomach, and lower the barbell onto your knee.

Answer format: ending1/ending2/ending3/ending4