C5W6D2 - Treadmill HIIT/5k

This morning I ran on the treadmill for the first time in over 6 weeks. I did a BFL style HIIT for 20 minutes finished out to a 5k. I found out after going to the same gym for almost 3 years that the max speed on the treadmill is 10.0 mph. I reached 2.7mi in 20 minutes beating my old treadmill distance by 0.1mi. I finished 3.1mi in 22:44 beating my treadmill 5k PR by 64 seconds. 22:44 makes 21 minutes seem closer in reach.

Maybe I should run on the treadmill more to work on high speeds or should I just build up my speed outdoors?

http://connect.garmin.com/activity/200204898

Red = Race, Blue = Training Run, Grey = Treadmill Gym

Blue = Treadmill, Green = Outdoors