Drift test

I did another drift test tonight. The results are on a par with my pace just before Cardiff, which is a little frustrating as I am always looking for signs of improvement. However, I was tired after my 70-mile week and it took me a long time to warm up and feel comfortable, whereas for the pre-Cardiff test I was well rested. Am I plateauing, or should I be pleased that I can get such results 2 days after a hilly 18-miler?

Here are the results:

1.5-mile continuous laps. 1.5 mile warm up/cool down not included

Lap	Lap time	Mins/mile	bpm
1	12:11	8:07	135
2	12:10	8:06	139
3	12:02	8:01	142
4	11:57	7:58	143

And here's the one I did on Sept 16th 2005 prior to Cardiff, for comparison:

1.5-mile continuous laps. 1 mile warm up/cool down not included

Lap	Lap time	Mins/mile	bpm
1	12:04	8:03	134
2	12:00	8:00	139
3	12:03	8:02	141
4	12:12	8:08	141