It seems that all new runners and 'newer' runners stress about speed, but it that is you, please remember that speed – up to a point – comes naturally as you build endurance. First concentrate on endurance. After your weeky mileage is up to 25 miles, then – and only then – should you insert speed work.

Everything in due time!

I always harp on how important it is not to worry about running speed, and I am adamant about that; however, I know newer runners always worry about being slow. Well, running endurance is far more valuable than speed; it is what it's all about, really. Without endurance, without being able to run at least a few miles, non-stop, you will never get faster. If you want to get from jogging a few steps to running a few miles, that's endurance. In this podcast, I'll explain how to build running endurance, how to strategically increase running and decrease walking.

Mojo for Running.