Hey Jag,
With the Cervical Fusion arm movements definitely could be causing the tender/painful area's. Even though you think you didn't do much.....you probably did! Reaching, bending, up and down movements with the arms, looking up etc. Thats alot of movements!
TAKE care and I hope you feel better soon!
(((((((((((((((((((JAG)))))))))))))))
XXOO
Patti