Five rounds for time of:
Run 600 meters
40kg/30kg Squat clean thruster, 15 reps
*As soon as you complete the five rounds you have 10min to establish a 1rm Clean
Adding intensity to your workouts and reducing their duration can have significant, positive effects in your results. But don't take my word for it... read How 1-Minute Intervals Can Improve Your Health. And if you really want to know for yourself, test it out. Try replacing some of your medium distance runs for a month or two with short, intense intervals. But don't forget that for athletic performance in a distance race, getting miles under your belt and time on your dogs is still important, especially if you're training for anything longer than 10k.