This work develops a protocol for tracking thermal parameters (skin temperature) in operators (men and women) that work in an assembly station, by monitoring the temperature of the skin on the back-shoulders-hand, using the method of infrared thermography as a noninvasive tool for risk assessment in musculoskeletal diseases. The study characterizes the difference in temperature for men and women that perform same manual assembly tasks. It is observed the infrared thermography as a useful tool that let collect data that can be used in the biomechanical design of work stations.