after the first time i went out, i couldn't walk properly for a week. it's the simple fact that you're engaging muscles in ways you never did before. your body has to acclimate itself to the ways you want it to move. once you can move again, any muscle soreness you get from exercising will be completely normal and go away after a day or so (at the very top end). like everyone else here, i suggest not taking any large drops yet, and focus on your body awareness.