I Am Lance Armstrong...Not Really

So about 4-5 years ago I bought a bike at WalMart. Nothing fancy just your average mountain bike, which I thought would be good for riding around town. For the past few years I have ridden that bike intermittently, basically whenever I decided that I needed to lose weight. Well this year I decided to get serious about geting into shape, so I have been riding with reckless abandonment. I took the bike in to the bike shop to get serviced, I bought a helmet (finally), I actually adjusted the bike to fit me! So I get out there, all geared up and I ride like I am in the Tour de France. I pedal my little heart and I have actually built up to 10-14 miles! I vary my routes like all the health magazines say to do so that my muscles don't have a chance to adapt to the workout. (Oh yes I am reading health magazines now, but I'll get to that later) I am doing all of this regularly, 3-4 times a week and I have come to 2 conclusions....1. After 3 months of riding I still have no discernable muscle tone and 2. I think I got lapped yesterday by a senior citizen! I don't know if I was truly lapped, because I don't know when he started his ride, but I do know that he passed me and he looked pretty spry! Obviously, I need to kick my training up a notch to say the least. The goal is to wake up at 5 and ride in the morning. It is going to be almost 90 degrees in the D and that is just too damn hot to be out there! Wish me luck