Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to improve your 2 mile run time [title] Run every other day. [step] Doing this will establish running as a habit in your life. This simple step will improve your heart rate, lower your weight, increase your endurance, and relieve all of the stress built up inside of you.

Ending1: [substeps] Write down which miles you run every day in a notebook. Spend a little time each day writing down where you run from, what it is like to run from home, and where your favorite song is. Ending2: [substeps] While not everyone can jog all day long, it is beneficial to start running about once a day. Even when you aren't jogging, taking one day off a week should count as a period to help your body reap its benefits. Ending3: Tell a reliable exercise book or guide that you're willing to put into practice. [substeps] Take the book with you, and add 1 mile for every month you run on the treadmill. Ending4: Running every other day also gives your muscles time to heal. [title] Buy running shoes designed for your feet and bone structure.

Answer format: ending1/ending2/ending3/ending4