Gaining Muscle by Riding?
I've been riding more and more lately, and I've noticed I've been more muscular. I've lost about 2 pounds (I'm not fat at all), but I notice I'm more muscular and then I gained the 2 pounds back. I was talking with my friend and he said you can't gain muscle by riding, just lose flab. But my arm muscles are bigger, my leg muscles are bigger, and I actually have seeable abs now.
Have I just lost flab or am I gaining a little muscle? I definitely feel stronger, and my girlfriend says I look even "sexier" now.
Just wanted to know if you can gain muscle riding.