I am a moderate/low mileage runner. My peak mileage this summer will be 65 miles, but I will do a lot of those weeks. Over the past winter, I grazed 65 miles once and my intensity was right around 6:45 per mile. This summer I originally planned to drop my intensity down to 6:30 per mile and do more consistent mileage, but I have been running under 6:20 for a lot of my runs. I feel great running that quickly, and the mileage is easy, but I am wondering whether I should chill the pace out to keep myself safe from injuries, or should I keep it up? I want to improve a lot this fall, and I respond best to higher intensity training, so I'd like to get my intensity down before I start upping my mileage too much. Any advice?