Maybe I do have something to add.....I looked a few post back which must have been about 6 weeks ago when my paces sucked and I was tired.......well like always in running....things eventuall turn and for about the last 25 days the paces have pretty good and I have felt likewise.......only 3 runs have not been sub8 pace since about April 20th and none have been slower then 8:09 pace with many sub7:30 or sub7:40 pace runs.....so feeling pretty good as the heat is upon us.