RUN TWO SETS OF 6 400-METER REPEATS AT YOUR 10K PACE: Today we're breaking the workout up into two sets of 400s instead of one long set. Head back to the track and warm up. Now run six 400-meter repeats at your 10K pace. Jog 200 meters between reps to recover. When you finish these first six repeats, recover for three to five minutes, then do your second set of six 400s. Finish the workout by cooling down and stretching.
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