Life-like, scenario-based training and human autonomic functioning: The new neurobiology of police work

I authored a paper for a class I took on the interaction of stress on brain functioning among police officers. It was an awesome class taught by a physician Sabina Berretta, MD from McLean Hospital in Boston. Severe threat responses that are extended or frequently repeated can significantly raise the risk for physical and mental health conditions such as cardiovascular disease and anxiety disorders – and PTSD. 

“Although resilience — the ability to cope during and recover from stressful situations — is a common term, used in many contexts, we found that no research had been done to scientifically understand what resilience is among police.” as published in the Royal Canadian Mounted Police Gazette Magazine in 2017. Law Enforcement officers have a unique role among first responders in that they often have little time between calls for service. They face repeated stress, work in unpredictable and time-sensitive situations, and must act in accordance with the specific provincial and departmental policies according to RCMP documents. Police everywhere are faced with this reality. Some might argue policework is comprised of hours of boredom coupled with moments of extreme stress and shere terror from exposure to traumatic scenes and experience. The juxtaposition of these changing scenarios bespeaks the career challenges faced by cops from small towns to urban cities.

LEO’s experience wide ranging physical conditions from hour to hour during their appointed shift work. In a study by Andersen et al. designed through looking at realistic training scenarios this variability came to life. HRs rose significantly with potential encounters from an average resting rate of eighty-two beats per minute upward to 130-140 bpm or more during high stress calls. For example, Anderson reported the following HR averages for a variety of police actions: hand on gun, no suspect (134 bpm); holster snap open, no suspect present (131 bpm); hand on gun, suspect present (134 bpm); holster snap open, suspect present (131 bpm); talking to suspect (134 bpm) (Anderson et al., 2002)”.

Research shows that there is no evidence-based replacement for reality-based training. In a study comparing technology-delivered training with reality-based training and active-duty encounters, the data found that technology-delivered training didn’t mimic or prepare officers for real-world encounters as did reality-based training, according to her study Judith Andersen at University of Toronto, Canada. The management of autonomic arousal is illustrated in data obtained from officers with excessive HR given that research has shown that when HR exceeds 170 BPM, perceptual distortions (e.g., tunnel vision, auditory exclusion), freezing, and possible irrational behavior are highly likely to occur (Siddle, 1995). Siddle focuses much of his writing on having a warrior mentality and remaining focused. Autonomic systems in the body sustain us for short periods when there are threats present.

The fight-flight response activates us for battle in the presence of fear, threat, and unseen danger. We need officers to be prepared when under threat especially when times become chaotic and threatening. When these threats are no longer present the parasympathetic system needs to put the brakes on our runaway stress response. The problem lies in cases where the fight-flight system becomes unmodulated and chronically on guard – like the hypervigilence associated with PTSD. The body reacts to reality-based training by allowing for automatic changes in heart rate, muscle tension, galvanic skin response, and respiratory rate to be ready when needed. Physical conditioning and healthy nutrition combine with stress hormones at times of high stress to aid us in battle. Similarly, it becomes essential that the burden be mitigated at the end of the day. Unless this can happen, officers may become cynical and lose resilience needed for a hardy career. In some cases, officers who are poorly regulated may become candidates for career burnout and questionable use of force.


Andersen, J.P., Pitel, M., Weerasinghe, A., & Papazoglou, K. (2016). Highly realistic scenario-based training simulates the psychophysiology of real-world use of force encounters: Implications for improved police Officer Performance. Journal of Law Enforcement.

Andersen, J.P., Pitel, M., Weerasinghe, A., & Papazoglou, K. (2016) http://www.jghcs.info (2161-0231 ONLINE) JOURNAL OF LAW ENFORCEMENT, VOLUME 5, NUMBER 4.

Laur, D. (2014) The Anatomy of Fear and How It Relates To Survival Skills Training. Integrated Street Combatives. http://www.hptc-pro.com/wp-content/uploads/2014/01/The-Anatomy-Of-Fear-Laur.pdf, taken January 29, 2023.

Siddle, B. K. (1995). Sharpening the warrior’s edge: The psychology & science of training. Millstadt, IL: PPCT Research Publications.

The Mindful person: Learning to lower the body’s thermostat

Stress effects all aspects of how we feel. There is no cure for human stress we must learn to modulate its impact. The only true adjustment is taking direct action to lower tension and unrealistic expectations. The other day I was so wound up with some much stress and tension I almost cut my 12-hour day short. Things settled down but not after an 8:30 AM crisis call from a patient living on Cape Cod. All at once, my day was diverted to needing to find a hospital bed for a client with a boat load of unrealistic anger and now suicidal ideation. Not easy. At this moment, I wish I could have gone home but there are scheduled cases who expect to be seen by me later in the day. I am only one clinician and have zero office help with some resentment. I cannot blow it off. Many have waited 3-4 weeks for one hour of my time. Everyone feels stress and some manage it better than others. For me, I work out in the home gym, and play ice hockey twice a week and I share time with my special grandson Parker who is now 3 and about to have a little sister join the family. But all too often, the main stress buster for me is a glass of scotch at 6:00 PM. I try to keep it to one, but this is no guaranty and I know this is not an effective way of lowering stress.

When the body is stressed, muscles tense up. Blood pressure and cortisol levels go up. This happens because stress releases the autonomic fight/flight response that activates when we are under threat. A sudden emergency, whatever it may be, can send us into the never never land of anxiety, fear, and autonomic arousal causing a variety of physical responses and inflammatory conditions. Headaches, neck pain, and upper body tightness all are the result of omnipresent stress. Muscle tension is a reflex reaction to stress—the body’s way of guarding against injury and pain. With sudden onset stress, the muscles tense up all at once, and then release their tension when the stress passes. For some individuals under great stress this sometimes does not work. “Chronic inflammation is a deleterious to health, resilience, and job satisfaction.

“Learned resilience can be taught and leads to reduced stress and psychological hardiness rather than psychological weariness.” according to Leo Polizoti, Ph.D., my colleague at the Direct Decision Institute Inc. Dr Polizoti studies the result of high stress of job functioning among many police agencies and understands the impact of chronic stress on job satisfaction. Psychological weariness is a drain on personal coping and adaptation to situational stress. I have felt the weariness triggered by high stress times here at the hospital. Sometimes it is only me hit by the stress. Others seem so chill and content.

Most physicians know that mindfulness techniques lower subjective levels of stress and tension. However, even though paced breathing puts the brakes on sympathetic overdrive, people do not use it long enough to create habits. This robs them of the propitious sense of wellbeing espoused by the adherents of the mindful way of living. “Meditating”, according to Dr. Woolery-Lloyd, initiates the relaxation response, which activates the body’s parasympathetic nervous system and decreases cortisol and lowers inflammation.” It helps put the brakes on our alarm bells. A lot of biofeedback protocols can serve to reduce the levels of cortisol and adrenaline in the blood stream helping people feel better. Exercise in general will also afford you physical release and lowered stress and tension. As human beings, our physical health depends on our capacity to manage and lower inflammatory responses in organ systems throughout. Easier said than done.

Mindfulness has the potential to put the brakes on abnormal, elevated fight/flight activity and its pervasive role in the inflammatory and abnormal stress response. There is so much being published about the role of inflammatory disease in organ disease and failure taking a great toll on personal health. I wish we could measure it like a simple thermometer. The relaxation response is triggered when we use mindful strategies to find coherence. So, whatever your level of stress, for longevity and happiness you learn to manage it. It is nothing to ignore or laugh off and stress has been shown to cause health problems and deteriorating wellbeing. There is no cure for stress as it is everywhere. For health reasons redefining one’s emotions can be the source of coherence and greater mastery over the chronic diseases and conditions associated with unregulated stress.

There is accumulating evidence suggested that excessive inflammation plays critical roles in the pathophysiology of the stress-related diseases” such as hypertension, cardiac disease, pain, auto immune disease, depression, and anxiety. Stress reduction does not happen by itself. We are prompted about mindfulness techniques and ways to lower our tension and offload our stress one step at a time. I try this weekly with modest success. It works but people (including me) do not practice it enough.


Lloyd, C et al. (2002) Journal of Mental Health 11, 3, 255–265