I think my next 30 day challenge will be this interval workout: http://www.runnersworld.com/peak-performance/new-workout-the-30-20-10-produces-impressive-results … Only 10 second sprints, but still promising results.
@JohnGStark planning 4x a week, to do the workout with 3 sets of the 5 minute base. Final week, will move to four sets?
10:08 PM - 2 Aug 2015
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