We pick up the Interval Show series covering the content of the Primal Endurance book with part 2 of Chapter 7 - Sprinting. Pick the ideal training period/time of year, the ideal day, workout type (weight bearing is the best, but low or no impact works if necessary). Warm-up properly, choose the proper sprint duration, recovery periods, and reps. Brad says you need not do much more than 6 x 100m or 2 x 200m + 4 x 100m. Brief, explosive, and consistent quality efforts!