Verbal and physical client aggression - A longitudinal analysis of professional caregivers' psychophysiological stress response and burnout.

•Exposure to client aggression may increase the risk of work-related burnout.•Experiencing verbal and physical aggression could be linked to high hair cortisol, which is associated to a range of maladaptive health effects.•Administrative, professional and emotional support may help to cope with challenging work environments and provide optimal care for clients.