Shoulder injury from working out... is this a normal pain?

My husband started a new strenuous workout regimen 2 days ago and today he can't move his right arm at all because his pain is so severe. It is only on the right side though and he did everything evenly on both sides. The pain is in the trap and it keeps him from moving his arm. He is going to go see the doctor for sure, but I was just wondering if anyone here could tell me if it's possible that this is just a normal "soreness" from a hard workout and that a few days from now he will get his range of motion back.