How long does it take to get out of running shape?

In only two weeks of inactivity, your body loses the ability to consume and process oxygen as fast

Try variable-intensity intervals to increase your VO2 max

Adding a few surges during your next interval session can make you a better runner

The science of speed: understanding fatigue resistance

Better fatigue resistance separates the elites from the rest of the pack, so what can you do to improve this variable for yourself?