Training for the BMW Dallas Half Marathon was my chance to get back into running. Training for the BMW Dallas Half Marathon was my chance to get back into running. One thing that I have learned from being an athlete in my younger days is, you have to practice. It’s much more true now that I am older. I started this training at Mile 0. So if you think you can't run a half marathon because you have never ran in your life. Think again! Here are tips and advice to get you started.