Cumulative trauma disorder (CTD) refers to a collection of disorders associated with nerves, muscles, tendons, bones, and the neurovascular (nerves and related blood vessels) system. CTD symptoms may involve the neck, back, shoulders, arms, wrists, or hands. Interpreters with CTD may experience a variety of symptoms including: pain, joint irritability, swelling, pins and needles sensations, numbness, and skin color/texture change. Initially, symptoms may begin during or immediately following an interpreting assignment and subside within a few hours. Or, they may first occur at night, disrupting sleep. Unaddressed symptoms may become more pronounced, lasting for a longer time. Eventually symptoms may become incessant, obstructing normal daily activities. One component of a multifaceted prevention and management program of CTD is biomechanics. Biomechanics relates to an interpreter's workstyle and is affected by their posture, movements, and periods of rest. [For the Spanish-language version of this document, see ED534418.]