An occupational health nurse is preparing to teach a health promotion class for workers at a warehouse. Which of the following statements should the nurse include?

"Rub your hands together for at least 10 seconds when washing them."

"Keep your abdominal muscles tightened when lifting objects."

"Ensure that 20% or less of calories are from saturated fats."

"Engage in aerobic exercise 2 to 4 days per week for 20 minutes."