I walked one mile at the 97th percentile for my age of 57 as a woman at a pace of 12.44, and it was an improvement of 23 seconds from the previous mile walk.  The average speed was 4.7 and a maximum speed was 6.3.  The initial speed was 4.6 with an increase of 4.7 at .50 miles, 4.8-5.0 at .75 miles, 5.0-5.5 at .85 miles, and 5.6-6.0 at .90 miles until the end of the mile.  The mile was the second one for this afternoon.  The first mile was at a slower pace of 17.19, and an improvement of 24 seconds in comparison to the first walk on the last previous first-mile walk.  The speed was increased from 3.2 - 3.5 at .50 miles, 3.5 - 4.0 at .75 miles, and 4.1 at .90 miles, 4.2 at .92 miles, 4.3 at .94 miles, .94 at .96 miles, and 4.5 at .98 miles.