If you can do 10K, with this app you will get to 21K.Ģ1K improves your fitness and endurance with an awesome training program. The Ultimate Half Marathon training app, from the makers of the award winning health and fitness workout apps like Pushups, Situps, 5K Runner, 10K Runner, Squats and more apps.Ģ1K Runner is the easiest and most successful 1/2 marathon program in training 10K runners to train for their first 21K ( 13.1 miles ). Start with 10K running and gradually increase to a full 21K ( 13.1 miles ) on your way to a full marathon. Our 21K - 13.1 mile - half marathon pro run trainer improves your cardio, endurance and overall fitness with an awesome run training program. Train to run 21K/13 miles with our Half Marathon Training: 21K Great for cardio!
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