40 Minute, 4.2 Mile Treadmill Routine:

Time Speed Incline
0-2 4.0 1%
2-5 6.0 1%
5-20 6.5 1%
20-25 7.0 1%
25-30 6.5 1%
30-35 7.0 1%
35-38 6.0 1%
38-40 4.0 1%
Total: 4.2 miles