title: Comparison of the Cervical Extension Angle and the Upper Trapezius Muscle Activity between Overhead Work and Below-knee Work.
abstract: [Purpose] The purpose of this study was to compare the cervical extension angle and the upper trapezius muscle activity between overhead work and below-knee work. [Subjects] Twelve males aged 20-30 years, were recruited. [Methods] We measured the cervical extension angle and upper trapezius muscle activity during overhead work and below-knee work. [Results] The results show that the cervical extension angle and upper trapezius muscle activity were significantly increased during below-knee work compared to overhead work. [Conclusion] Below-knee work is more likely to cause neck and shoulder pain than overhead work. Therefore, future studies should investigate below-knee work in detail.
authors.affiliation: Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University and Elderly Life Redesign Institute, Republic of Korea.
authors.forename: Won-Gyu
authors.initials: WG
authors.lastname: Yoo
keywords: Below-knee work; Cervical extension; Shoulder pain