Physical ergonomics is about the human body's responses to physical and physiological work demands.Repetitive strain injuries from repetition, vibration, force, and posture are the most common types of issues, and thus have design implications.
Physical ergonomics is concerned with the impact of anatomy, anthropometry, biomechanics, physiology, and the physical environment on physical activity. Areas of focus in physical ergonomics include the consequences of repetitive motion, materials handling, workplace safety, comfort in the use of portable devices, keyboard design, working postures, and the work environment.