Preliminary Effectiveness of Process-Based Personalized Physiotherapy for (Sub)Acute Neck Pain

The goal of this clinical trial is to learn if personalized physiotherapy can lower neck pain in adults with recent (sub)acute neck pain who have a higher chance of the pain becoming long-lasting. The main questions it aims to answer are: Does personalized physiotherapy lower pain compared to standard physiotherapy? Does personalized physiotherapy improve daily activities, quality of life, and pain interference compared to standard physiotherapy? Do physiotherapists deliver the personalized treatment as intended? Researchers will compare each participant's own results during a standard care period to their results during a personalized care period, to see if the personalized approach works better than standard care. Participants will: Receive standard physiotherapy care for 3 weeks Then receive personalized physiotherapy, tailored to their individual needs, for several weeks (until their treatment goals are achieved) Answer short questions about their pain and daily functioning three times a week Take part in an interview about their experiences every 3 weeks