Before revision: MSDs can arise from a sudden exertion (e.g., lifting a heavy object), or they can arise from making the same motions repeatedly repetitive strain , or from repeated exposure to force, vibration, or awkward posture.
After revision: MSDs can arise from a sudden exertion (e.g., lifting a heavy object), or they can arise from making the same motions repeatedly (repetitive strain) , or from repeated exposure to force, vibration, or awkward posture.