I have been getting regular adjustments from a chiro and while most things seem to be settling down nicely, my mid-back seems to like to come out of adjustment the easiest.  The T5 is the one I notice the most as I notice it affecting my stomach and my appetite.  Once adjusted, things normalize.

Some background: 27 year old athletic healthy male, no prior back injuries or ailments.  Full time work and full time graduate school and lots of time in the car driving between all of these.  Less working out and gym time this past year than years in the past, due to work and school (probably poor posture at each), so my core stength is in generally poor shape at the moment.  Basically riding rocky singletrack, highspeed desert, or rough MX tracks are my forms of exercise, and those activities with no supplemental exercise are probably more destructive than anything else, so I need to get back into a regular routine.

Besides the usual stuff like bench press, rows (supported), pulldowns, crunches/leglifts, and back extentions, what exercises are there that I can do to strengthen around my spinal column mid-back?  I'm thinking something along the lines of low weight/slow rep close-grip pulls, upright rows, pulldowns, etc, but I could be way off base.

Any suggestions?