Actually, the hard part was not giving up by the second interval.
Ran 3 x 1-mile intervals for a total of 7 miles. 1% treadmill incline.
1 mile warm-up @ 6.5 mph (9'14")
1 mile interval @ 8.5 mph (7'04") - tough, but manageable
0.5 mile recovery @ 6.5 mph
1 mile interval @ 8.5 mph - exhausting, but made it.
0.5 mile recovery @ 6.5 mph
1 mile interval @ 8.5 mph - like the push at the end of a 5k race. For a full mile.
0.5 mile cool down @ 6.5 mph
0.5 mile cool down @ 6.6 mph
0.5 mile cool down @ 6.7 mph
0.5 mile cool down @ 6.8 mph
Gee, that wasn't so bad after all. My body just doesn't have much will to run hard these days.
"like the push at the end of a 5k race. For a full mile."
...good times.