ukathleticscoach wrote:
Garbage, you can do much faster than 3km pace with this session. It is a crap session there is no excuse to use it
As some more knowledgeable people have already posted, a workout like this can have a place in an overall training plan. Obviously it's not a bread and butter 5k workout.
Really it doesn't matter if it's 3 minutes jog, or 5, or 10. The point is that you're getting full recovery. One km repeats are long enough that accruing fatigue between one isn't necessarily that important unless you're trying to simulate a race, which is something for later in the season.
I think workouts like these are great if you practice non-linear periodization (like you should). I would do stuff like this in the middle of the summer if I was training for fall cross. If done at slightly faster than 5k pace it will help you to maintain that top end, without taking much out of your legs while you're focusing on mileage. It might also be a workout to substitute for a more traditional 5k workout if you're coming off a really hard week or trying to be a little fresher for an upcoming weekend race.