EMTs and Paramedics work both indoors and outdoors and in all types of weather. This occupation, including the clinical and field training, is physically strenuous, requiring considerable kneeling, bending, stairclimbing, and lifting while caring for patients. There may also be exposure to contagious diseases, mentally unstable or combative patients, and potentially dangerous environments. Classroom and lab activities may include prolonged sitting or standing, squatting, lifting, and manipulating small objects, requiring manual dexterity. Students have close physical contact with other students and patients during their training. The ability to verbally communicate and hear is necessary for assessment skills and communication with patients and healthcare workers.