Long intervals vs short repetitions

There are probably as many different versions of interval training as there are runners. There are short and long intervals, but what is the differences between these two and what to take account.

Long intervals also known as intervals or hard training. Intervals are often measured either time or distance, for example 5 x 2min or 5 x 800 meters. The minimum time that one interval takes is often 2 minutes but it normally vary between 2-4 minutes. In distances it’s normally set between 800m – 1500m. Continue reading ”Long intervals vs short repetitions”