Nice variety of entries. If I could see entry #20 with a spine included I believe I might really like it. The other entries are nice, however, I am finding I am not a big fan of the circles that are included such as in entries #19 and #21. Also, entry #22 is a big large. Overall, I like your variety of entries.
I like these, but, having a detailed spine incorporated is important to me. Maybe a sporty figure or something different than the AE? I like it, but, it isn't defining enough for me as a chiropractor.
I really like entries #90 and #91, could I see those in different color schemes? Also, do you have any other ideas for the picture? I like the idea of incorporating a sporty figure, but, as far as what it is, that is up to your creativity!
Thanks will send some color combinations in a moment. I'll keep updates with ranked entries for more development. By the way what kind of athletes/sport you can sample for the logo concept?