are 12 minute miles slow?
A 9-minute mile for a man and 10:30 for a woman are signs of moderate fitness; men who can't run better than a 10-minute mile, and women slower than 12 minutes, fall into the low-fitness category. ... Over all, he said, a 10-minute mile for a middle-aged man and a 12-minute mile for a woman suggest a good level of fitness.