Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to train at home [title] Start with the legs. [step] Sit down, spread your legs as far as they will go. [title] Stretch toward the right or left leg holding it for 30-45 seconds.

Ending1: [step] Do not move on until you feel comfortable reaching your arms. [title] Walk to the left, then to the right side and hold both legs at the same time for 30-60 seconds. Ending2: [step] Switch to opposite leg and do the same. [title] Stretch toward the middle as far forward as you can. Ending3: [step] Sit back down and repeat the exercise on the other leg. [title] Start with your feet, pushing down from your knees toward your butt. Ending4: [title] Without lifting your legs too far back, gently walk them slightly across the floor to increase the stretch of your calf muscles. [step] Keep your calf muscles relaxed as you walk, so any discomfort or pain you experience during the exercise will soon fade away.

Answer format: ending1/ending2/ending3/ending4