Anxiety related to movement has been found related to pain, disability and activity avoidance in persistent low back pain. Therefore, it significantly impact on the person's performance of daily activities. The current method of measuring anxiety related to movement in low back pain has been by using questions. However, the questions do not address anxiety related to specific movement and activities. Therefore, it is important to determine whether we can obtain the physiological change in anxiety (heart rate, skin response, and respiratory rate) by using some novel protocol where the participants will be imagining pictures of daily activities tasks. We will simultaneously measure their physiological anxiety-related responses which are temporary in nature and they usually perceive during their daily activities. Furthermore, we will provide initial idea on does the full questionnaires or items in the questionnaires are measuring anxiety related to movement or not, which can be considered in future large studies.