After my 1st lesson, I walked like John Wayne rolling into town and looking for trouble. For 3 days. In Manhattan, going to restaurants and shows.
I knew it was time to start taking 2 lessons per week when I didn't walk like that at all after riding.
I believe a warm bath, maybe a massage, would help. Or you could work it out by taking a run around the neighborhood.
FWIW, it only took a couple of lessons before the real inner-thigh soreness didn't come around any more. Now I feel it in a totally different place, from posting for a half-hour.