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.
Speeds. Start your treadmill workout with a slower walk, increasing your pace as your body warms up, beginning at 1.5 miles to 2 miles per hour, especially if you are new to a fitness routine, according to TreadmillTalk.com. Speeds from 3 to 4 miles per hour are a fairly gentle walking pace.