You live to run. The sound of your sneakers on the pavement is as essential to your life as breathing. You want to stay healthy and injury free, which is why you you don't just run, you cross train. A chimera of two serious journals our RunFit series is the perfect blend of weightlifting, functional fitness and running. It's never been easier to keep track of your numbers and time standards in a style that perfectly suits you. Built to outlast the rainy days at the track and the many travels in your gym bag squashed between your two beloved shoes.