You've been running a year or more, done some 5-Ks, maybe even a 10-K. But you've always finished feeling like you could have, or should have, gone faster. You consider yourself mainly a recreational runner, but you still want to make a commitment to see how fast you can go.

Here's the two-pronged approach that will move you from recreational runner to the cusp of competitive athlete. First, you'll be adding miles to your endurance-building long run until it makes up 30 percent of your weekly mileage. Second, you'll now be doing a substantial amount of tempo running aimed at elevating your anaerobic threshold, the speed above which blood lactate levels skyrocket--a gulping-and-gasping prelude to your engine shutting down for the day. How to avoid this unpleasantness? With regular sessions at a little slower than10-K pace--that is, tempo-run pace. This will significantly improve your endurance and running efficiency in just six weeks.



Your tempo work will include weekly "10-10s," along with a mixed grill of intervals and uphill running, all of which strengthen your running muscles, heart, and related aerobic systems.

Pace Intervals (PI): Run at 10-K goal pace to improve efficiency and stamina, and to give you the feel of your race pace. For 10-minute pace (a 1:02:06 10-K), run 2:30 (for 400 meters), 5:00 (800m), 7:30 (1200m). For
9-minute pace (55:53), run 2:15 (400m), 4:30 (800m), 6:45 (1200m).
For 8-minute pace (49:40), 2:00 (400m), 4:00 (800m), 6:00 (1200m). With pace and speed intervals (below), jog half the interval distance to recover.

Speed Intervals (SI): Run these at 30 seconds-per-mile faster than goal pace. For 10-minute pace, run 2:22 (for 400m), 4:44 (800m), 7:06 (1200m). For 9-minute pace, 2:08 (400m), 4:16 (800m), 6:24 (1200m).
For 8-minute pace, 1:53 (400m), 3:45 (800m), 5:38 (1200m).

10-10s: 10-minute tempo repeats at 30 seconds per mile slower than 10-K goal pace; 3- to 5-minute slow jog after each.

Total Uphill Time (TUT): Run repetitions up the same hill, or work the uphill sections of a road or trail course.

Strides (S): Over 100 meters, gradually accelerate to about 90 percent of all-out, hold it there for 5 seconds, then smoothly decelerate. Walk to full recovery after each.

Race Day Rules "Many intermediate runners run too fast in the first 5-K," says Coach Sinclair. "That's the surest way to run a mediocre time. Even pace is best, which means the first half of the race should feel really easy." Sinclair's wife and co-coach, Kim Jones, a former U.S. Olympian, adds this: "Divide the race into three 2-mile sections: doable pace for the first 2, push a bit the middle 2, then go hard the last 2."