Day #74 - A double dip with a 5 mile run at a fast pace and then yoga with my wife . . . .

I started off the week feeling much better and ready for a great week of marathon preparation. Nine weeks from yesterday is race day. With the final three weeks being 'taper' weeks there is a quickly shrinking period of time for aggressive training.

Every good marathon-training plan should "taper" during those final 21 days. That means you run less and rest more. For some people, the idea of backing off on their training just before the big race seems counterintuitive. "So many runners train hard right up to the day of the marathon because they're desperately afraid of losing fitness if they don't," says Patti Finke, who coaches 250 marathoners a year as co-director of the Portland (Oregon) Marathon Clinic. "What they don't realize is that in those last few weeks it's the rest more than the work that makes you strong. And you don't lose fitness in 3 weeks of tapering. In fact, studies show that your aerobic capacity, the best gauge of fitness, doesn't change at all."

Research reveals a lot more than that. A review of 50 studies on tapering published in the journal Medicine & Science in Sports & Exercise shows that levels of muscle glycogen, enzymes, antioxidants, and hormones--all depleted by high mileage--return to optimal ranges during a taper. The muscle damage that occurs during sustained training is also repaired. And if that isn't enough, immune function and muscle strength improve, as well, which reduces the odds you'll catch a cold or get injured just before the race. And get this: The average performance improvement by the subjects who tapered in these studies was 3 percent. That works out to 5 to 10 minutes in a marathon.

I have 6 weeks of training left before it is time to taper.  I am going to have to be 'all in' if I am going to reach my goal of a sub-4 hour marathon.