Reverse transcriptase is the viral enzyme responsible for making a DNA copy of the RNA genome from a retrovirus. As such, it is technically known as an RNA-dependent DNA polymerase. This is opposite to the usual flow of genetic information from DNA to RNA to protein.
This means downhill sections of the ride may be faster, and uphill sections slower. 1  Easy: Under 10 mph. 2  Leisurely: 10-12 mph. 3  Steady: 12-14 mph.  Moderate: 14-16 1  mph. Brisk: 16-18 2  mph. Vigorous: 18- 20 3  mph. Strenuous: 20-22  mph. Super Strenuous: 22+ mph.
Day 2: Sunday (long ride, 80% of race pace) This was a tempo ride covering 104 miles (167 km) with 5,600 feet of climbing. Average pace was 17 mph (about 28 km/hr) with lots of headwind. My average HR over this 6 hour ride was 141 and average power output was between 190 and 200 watts.