This workout can be adapted for a variety of events, but this version is for a 5/10k racing period. This workout should be implemented in the final 8-10 weeks of training before a key 5k or 10k race.
The workout is 3-5 sets (depending on training level & ability) of (1,000 meters at 10k pace, 200m easy jog, 400m at 5k pace). Between sets take 3-4 minute walk/jog recovery. The total for each set is 1 mile, and with the easy 200m recovery jog in the middle you get the name “broken miles.”