If you're going to practice running, you might as well do it with seriousness. That is to say, you can do some fast running and even sprinting as if to save your life from someone or something. It's not always that you'll do this but running like this sometimes is worth it. That's because you can really work your legs, feet, and even the rest of your body to make yourself not only fit but also prepared. You might be asking, "What is there to be ready for?" It isn't to say that something bad is going to happen. It only addresses the fact that disasters may happen. So it's more on working on one's preparedness or survival instincts. So, when you'd train daily or weekly, at least have a plan. Don't just randomly run wherever and however you want to. Rather, you ought to have a system that you could follow to work on your lower extremities so that they would end up to be more dependable. This is to say that you should know when to change your p...