Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to exercise your shin muscles [title] Do wall shin raises. [step] These are simple exercises to stretch your shins while resting your back against a wall. As long as you have a solid background for support, you can do them just about anywhere.

Ending1: [substeps] Stand with your shoulders, back, and butt up against a wall. Place your feet away from the wall, with your heels about one foot-length in front of you. Ending2: To do them : [substeps] Lie on the floor, with your legs straight out in front of you. Lock your knees together and cup your hands at your sides. Ending3: [substeps] Stand with your feet just below the wall. Slowly reach one hand across the wall in front of you, coming back with your body on one side and your legs crossed over the other. Ending4: [substeps] Start with your body on one side, keeping your heels on the floor, and your feet planted on the ground. Bring your leg with your foot back and outward so your glutes (knee, shin, and foot muscles) remain loose and straight.

Answer format: ending1/ending2/ending3/ending4