Effects of Artificial Forward Head and Neck Posture on Shoulder Rotation Range and Strength in Healthy Individuals

Background Although high-quality biomechanical evaluations, such as a three-dimensional motion analysis and electromyography, have been performed to verify the relationship between forward head posture (FHP) shoulder dysfunction, most of studies mainly focused on neck muscle activity or pain. Purpose To investigate effects artificial FHP internal external rotator strength range (ROM) glenohumeral joint using dynamometer inclinometer. Study design The study had repeated-measures design. Methods ROM data were obtained from 29 participants. A standard inclinometer used measure passive rotation strength, respectively. Repeated-measures variance was compare with without conditions both sides. Results There significant difference in values during examination compared no (p<0.05). value differed significantly according side maximal However, sides interaction for any not (p>0.05). Conclusions results this indicated that negative effect joint, implying it may act factor causing musculoskeletal problems region. Therefore, maintaining correct is important only intact but also health joint.