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There’s the concept of block periodization, or what I prefer to call front-loading periodization. Most of us get into a default pattern of doing the same workouts week after week. For example, sprints on Tuesday, hills on Wednesday and club rides on the weekends. When most of us periodize our training, we might do one more sprint interval or one more hill effort, but the overall pattern remains similar. Yes, this pattern will provide training stimulus and improved fitness, but it may not be the most efficient. Rather, blocking, or front-loading, targets one type of effort (for example, 5–8 minute Vo2max-type efforts) exclusively for a period. You recover, and then move on to another type of effort. This system maximizes the stimulus rather than diluting your training through multiple types of efforts. Frontloading is a refinement where, rather than evenly spacing out eight hard workouts across four weeks (that is, two per week), you overload the body by front-loading the first week with many efforts (possibly five in the first week). You then focus the next three weeks on recovery, with one additional hard effort per week. You do the same total work, but the spacing is different. Studies have shown that the fitness and performance gains are much higher this way. Rstephen” cheungs