1. Ergonomic and postural intervention on workstation

BEFORE	AFTER
1. Too much light from the windows 2. Chair height 3. Back rest too much inclined 4. Video display too high 5. Elbows suspended	1. Tent to avoid reflexes on the screen 2. Chair height fixed to permit 90° angles between legs and body 3. Back rest fixed to avoid a lower discal pressures (Andersson GB, 1979); 4. Video display set to maintain the physiological cervical lordosis 5. Elbows must be supported by the table to maintain shoulders relaxed