This workout was done on the treadmill because I had to get my daughter to ballet practice. It was a challenging workout. The 600 meter pace was run at 9 mph (6:40/mile) the 1200 meter was at 8.5 mph (7:03/mile). I think the 600 meter run was a tease to get me used to the surges that a 5K run may require out of my pace comfort zone in order to achieve my goal time. The 1200 meter portion is intended to teach me to recover at the pace I want to run at. It is funny how a quick pace can be recovered from at a pace only 20 seconds per mile slower.