Too many to list, most of which no normal person has ever heard of, but basically all muscles responsible for neck extension. They may have names like transvers

Too many to list, most of which no normal person has ever heard of, but basically all muscles responsible for neck extension. They may have names like transversospinalis, semispinalis, and multifidus. Yes it could, but usually people will take a break at the computer before it affects them. I'm 38 and have been programming for 20+ years without issue, my posture is sort of leaning back in the chair, definitely not leaning forward with heard forward.