By the way, the trainer was surprised at the adductor soreness because she said cyclists use those muscles (and she's a spin instructor) to keep their legs aligned straight and close to the top tube. However, once I told her that was my natural position without any effort (unlike the squatty bowlegged stuff you see from a lot of men), she agreed that there would really be no reason to engage those muscles unless I was consciously choosing to actually clamp the top tube.

So, now I don't feel like quite such a weenie.