I started road riding about 4 months ago now, after previously having no riding experience. I was very fit to begin with as I had been running for years and think I am fast making progress on the bike. I was very lean before I started riding, although my legs (thighs) and bum have always been the biggest part of me. In the past four months that I have been riding I have put on about 3 kilos. I eat more as my appetite is larger but by no means binge. My thighs and bum have absolutely blown up- my jeans are very tight now! I am pretty sure the weight gain is due to the muscle gain........opinions!? I am good at and enjoy climbing hills but I also do longer rides so its not like i'm climbing all the time. I want to have the lean/low body fat body of a cyclist, as I am small and think this would make me quicker...and I am worried the weight gain is detrimental. Suggestions!? How do i get better and stronger and quicker and faster but without the thunder thighs????