ERGONOMIC DESIGN, INC. Denver, Colorado WHY ARE ERGONOMIC ACCESSORIES IMPORTANT? Repetitive strain injuries either are, or will affect most of the 45 million U.S. workers who use computers in their jobs. Ergonomic accessories reduce turnover, improve morale, increase productivity, while improving the quality of your work life. Studies have shown 5% to 15% increases in performance and productivity. Some companies have enjoyed a reduced turnover in employees from 40% down to 5%, just by implementing sound ergonomic programs. Repetitive strain injuries account for 25% of all injuries and illnesses requiring days from work.