8.5 mile tempo/threshold run

I did a 2 mile easy warmup followed by 2 x 2 mile bursts at a 5:35/mile pace with a 3 minute jog recovery in between. I finished up with a cool down that was a little more then 2 miles to get about 8.5 in for the day. I felt much stronger today then I have in the last few weeks. Both physically and mentally. Best run I have had in a while.