Today is my first day back to work on a very limited basis. I'm starting out 4 hours per day, 4 days per week. I'm about 9 weeks out from my latest surgery which was posterior fusion C4-C7 with instrumentation. I also had a 2 level ACDF back in June of this year which failed. I'm was feeling pretty good but sitting at a desk today has brought on muscle spasms, headache and I'm exhausted. Is anyone else back to work? How is it going for you? What type of ergo changes did you make to be more comfortable? Any advise is greatly appreciated!