A lot of them.
On another thread I talked about the skin calipers I had done, both time from the same kinesiology professor at the local university. One at the end of Sept from a 7 site test had 17.75%. The one I just had last week was 15.99%.
My weight has gone up from 119 to 123.
My pants from last winter don't fit because I used to be a long distance runner. Thinner, but definitely not in as good of shape as I am now and a completely different build, so I can't go by the "how do your pants fit" theory.
For a little bit more background, at the time of my first set of calipers I had been building base and doing some temp work with a coach I started working with in early august. After my calipers, I began my AT build training (no, we're not training "for" anything, he just wanted to see how I respond, we're just playing around).
I have NEVER worked as hard at anything physically as I'm working on the bike with these efforts.
I don't even know what I'm looking for from posting this, really. It's just that I've seen a lot of threads where people say that 4 pounds of weight gain can't possibly be all muscle, but it's clearly not fat, and I don't want to change anything in my routine if it's all going well. Has anyone else experienced this sort of thing?