Higher Mileage, Faster Times?

For years, I trained for marathons with a peak weekly mileage of about 50. In 2002, I stumbled on a training plan by Pfitzinger with a peak weekly mileage of 70. The average mileage for the 16 weeks from when the training plan started to the taper two weeks before the marathon was 64.3. It was a big jump for me and I smashed my PR at Houston '03 (the Regis Factor). The past three years I've increased the mileage some more, using the Pfitzinger over 70 mpw plan. It hasn't paid off yet. We'll see what happens this year. Training seems to have gone well. I started off with a very disappointing 20:17 5K at the Brazosport Relay Triathlon and finished up with a decent 30K that wasn't a PR but was my second best race since I was in college. Over the last 16 weeks Ive averaged 74.0 miles per week (including a 14 mile week back in September when we drove up to Fort Campbell to see my son return from Iraq). In the past 10 weeks, I've averaged 80.8 miles per week.

Gun - Chip/Watch *Average weekly miles M-18 to M-2*

Best/Worst/First 11/12/1995 - 3:58:08 - 3:55:28 New York City '95 *??*

Best 11/3/1996 - 3:51:20 - 3:49:03 New York City '96 *??*

Best 1/12/1997 - 3:46:55 - 3:45:36 Houston '97 *35.3*

Best 1/18/1998 - 3:25:28 - 3:25:14 Houston '98 *39.7*

Best 1/17/1999 - 3:21:20 - 3:21:12 Houston '99 *44.5*

1/16/2000 - 3:29:46.7 - 3:29:25.0 Houston '00 *40.3*

2/26/2000 - 3:39:10 - 3:39:10 Ft Worth '00 *39.2*

Worst 1/14/2001 - 3:56:33.0 - 3:56:23.0 Houston '01 *43.5*

Best/BQ 2/18/2001 - 3:19:15.2 - 3:19:01.4 Austin '01 *43.1*

4/16/2001 - 3:27:37.0 - 3:23:52.0 105th Boston *40*

Best 1/20/2002 - 3:15:43.0 - 3:15:24.0 Houston '02 *44.6*

Best 1/19/2003 - 2:58:54.0 - 2:58:53.0 Houston '03 *64.3*

4/21/2003 - 3:07:12.0 - 3:06:25.0 107th Boston *54.7*

Best 1/18/2004 - 2:55:51.0 - 2:55:46.0 Houston '04 *67.0*

1/16/2005 - 2:57:53.0 - 2:57:51.0 Houston '05 *77.3*

4/18/2005 - 3:05:16.0 - 3:04:49.0 109th Boston *52.9*

1/14/2007 - ?:??:??.? - ?:??:??.? Houston '07 *74.0*