Training — intervals

How many times a week should I run intervals?

How many times a week should I run intervals?

One of the most important things to consider when putting together (or looking for) a training plan is including a variety of runs. Since American exercise scientist Stephen Seiler found that “elite endurance athletes perform 80% or more of their training at intensities clearly below their lactate threshold”, he determined that following the 80/20 rule was the best way to train for an endurance event. That means 80% of your runs should be easier and 20% of your runs should be more challenging: speedwork, intervals, hills, etc.

Interval...