Hi @Mr_J, the sequence of symptoms you experienced is not uncommon. To go for a work-out with that neck ache, your body would typically use compensatory muscle groups of the upper back and pectoralis in order to protect the neck muscles. However, these muscle groups would in turn fatigue, causing you the aches you feel. It is encouraging that the pain is improving and you are returning back to full function. I agree with the Physio that such an injury would typically take 6-8 weeks of disciplined rehab to recover. To speed up recovery, some have tried ultrasound therapy or dry needling. Based on your symptoms, there is not much cause for concern. However if you do develop numbness/tingling or weakness of either hand/forearm/arm, or if the pain does not resolve in the expected 6-8 weeks, it would be prudent to visit a doctor.

Dear @Mr_J What you are experiencing is not uncommon and likely musculoskeletal back pain as the pain comes on after exercise and gets better with rest. It would be prudent to avoid strenuous activities for now and allow the stiff neck and bodyaches to recover before returning to your usual exercise regime. You can continue seeing your physiotherapist and continue with the neck exercises and monitor if the stiff neck gets better. I will advise you to consult a doctor if the pain is persistent or you experience numbness or weakness in your hands or shooting sensation of pain from the neck down to your hands as it might suggest a more serious condition. Imaging such as Xray or MRI of the cervical spine might be necessary in such situation. Do not hesitate to see a doctor if you experience nausea or vomiting as well as fever as it might suggest a more serious condition when combined with your neck pain. I wish you a speedy recovery.