KEY Functional Assessments Network in Carlsbad Village has operated from 300 Carlsbad Village Drive since pioneering commercial functional capacity assessment methodology in the United States. Founded by Glenda L. Key, PT, the company holds three patents on its assessment system and trains physical therapists, occupational therapists, and certified athletic trainers across 42 states and six countries, building a clinical network that processes workplace injury referrals from acute providers including Scripps HealthExpress Carlsbad. The KEY Method encompasses prior-to-hire physical screening, return-to-work evaluations, and healthy-worker audits for employers in healthcare, manufacturing, and construction sectors seeking to reduce injury rates and workers' compensation costs. Post-injury functional capacity assessments coordinate with home-health providers such as BrightStar Care when injured workers require transitional support before clearing return-to-work thresholds. The four-hour KEY Functional Capacity Assessment battery measures dynamic lifting capacity across floor-to-waist, waist-to-shoulder, and overhead planes using calibrated weight increments and continuous heart-rate monitoring to establish statistically validated safe work limits.