Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to run a 5 minute mile [title] Develop a training schedule. [step] You'll never beat a five minute mile without a plan and proper schedule. For the best results, you should be training almost every day, incorporating different exercises.

Ending1: The first three days of training should be moderately challenging, while the break time should be between 1 am and 1 pm in between. [substeps] There are no set goals for this run. Ending2: This will look great on your record as a coach by letting your kids experience some variety of exercise. There are a lot of forms to choose from when it comes to running long distances. Ending3: [substeps] Start your week with a distance run, running for at least 40 minutes or about 3 miles, and gradually increasing that as you train. Take the next day to rest or do some other training like yoga or weight lifting. Ending4: Your training schedule should be based on your routine. If you're responsible enough to plan your training, then you'll have ample time to adequately exercise and meditate.

Answer format: ending1/ending2/ending3/ending4