35 minute, 3.75 mile Reversible Treadmill Routine:

Time Speed Incline
0-2 4.0 1%
2-5 6.0 1%
5-10 6.5 1%
10-15 7.0 1%
15-20 7.5 1%
20-25 7.0 1%
25-30 6.5 1%
30-33 6.0 1%
33-35 4.0 1%
Total: 3.75 miles