VO2 max - the measure of how much oxygen your body can get to your muscles - has tended to grab all the headlines when it comes to evaluating endurance running performance. After all, it's relatively straightforward to measure, gives quantifiable data and is a decent starting po...
Tempo workouts, speedwork, long runs, not to mention work, family and life in general... how can a runner fit it all in? One time-efficient solution: combo workouts, which blend elements of quality runs to make the most of every minute you have
