Most injuries to nurses are caused by lifting and transferring patients. And as the average patient gets heavier, those muscle sprains and strains are expected to increase. The University of Missouri-Columbia has expanded the Essig simulation lab at its Sinclair School of Nursing to include a 'safe practices room" to train nursing and medical students how to keep themselves healthy while caring for patients. "We're training them for the real world," said Nicole Bartow, director of the simulation center. "They learn here first so they don't make mistakes on patients."