Very interesting subject. I've been keeping a database of my rides, and after applying the formula, I found out that my average power is usually between 210 and 245 watts. That's better than I thought .

I have a quick question. I also found that when I went riding with my girl friend my power output was about 70 watts. She was trying hard and I was just matching her pace. Does that mean that her hourly power average is also 70 watts?