Hatha Yoga is a traditional system of exercises, used in India for the relief of painful condition since centuries and gaining more and more interest in Europe and the US. The efficacy of Hatha Yoga for relieving chronic low back pain has been repeatedly demonstrated in clinical trials, while there are no studies in the literature regarding chronic neck pain. The aim of this study is to investigate, whether a 9 weeks-course of Hatha Yoga reduces subjective pain ratings and disability in patients suffering from chronic neck pain. Furthermore, as neck pain patients have been shown to suffer from impaired sensory processing and proprioception, along with restricted range of motion, the study aims to test if Hatha Yoga can improve these variables. Therefore, tests regarding cervicocephalic proprioception, active range of motion and the processing of mechanical, vibration and pain stimuli will be included.