Speed Work, 5K On/Off

Did a speed workout, felt pretty good. Warmed up for .5 miles, then stretched, then jogged for 2 minutes and then did a 5K alternating fast/jog every ~200M (.13 miles on the Garmin). The pace for my 13 'fast' parts was between 6:54 and 8:04 with most of them around 7:30-7:40. The 'jog' parts were between 8:52 and 9:27. I then walked for 2 minutes and then jogged for .5 miles. Overall 4.57 miles in 40:38 for a 8:53 pace. Didn't push it too hard, as my max heart rate was 172. I kinda like this workout and will probably do it again sometime, but I don't see running my fastest 5K this way.