I missed my 5 x 400 speed work the other day so I made sure to fit it in to my run. I ended up running a total of 5.25 miles, which included my 5 x 400's. I ran my 5 x 400's at 7:19 per mile pace and my breaks in between at an 8:13 pace. Once I completed my 5 x 400's I ran at an 8:13 pace and finishing off the last mile at 8:00 pace. I felt great the entire time. I made sure to spend some extra time stretching afterwards too.