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Stress - The highlights of 2 years of research-based articles

25/10/2018

2 Comments

 
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​If you have found this article by surprise and have not read any of the previous articles, or just want to get all the information without having to read them all, then this is for you!

If you are desperately looking for answer to help you deal with you state of stress or anxiety, then this article is a must-read. you will have at hand all that you need to understand stress and its impact on health and wha you need to do to minimise your stress response to any event.

There is also a new factor that was not yet approached in previous articles, and it is worth the read, because the research paper was only published in April 2017 (just a few weeks ago).

Read to the end, especially if you have children!
Understanding the Physiology of the stress response - the basics
 
Defining the regulatory system in place to mount and stop a stress response:

"Adaptation in the face of potentially stressful challenges involves activation of neural, neuroendocrine and neuroendocrine-immune mechanisms. This has been called “allostasis” or “stability through change” by Sterling and Eyer (Fisher, S. Reason, J. (eds): Handbook of Life Stress, Cognition and Health. J. Wiley Ltd. 1988, p. 631), and allostasis is an essential component of maintaining homeostasis [the body regulatory system to maintain survival]. When these adaptive systems are turned on and turned off again efficiently and not too frequently, the body is able to cope effectively with challenges that it might not otherwise survive. However, there are a number of circumstances in which allostatic systems may either be overstimulated or not perform normally, and this condition has been termed “allostatic load” or the price of adaptation (McEwen and Stellar, Arch. Int. Med. 1993; 153:2093.)"
McEwen, BS. (1998). Stress, Adaptation, and Disease: Allostasis and Allostatic Load. Annals of the New York Academy of Sciences. 840, pp. 33–44.

Why was it necessary to name the system in place, when the body can no longer cope: "the wear and tear" on the body, which accumulates as an individual is exposed to repeated or chronic stress?
"Stress is frequently seen as a significant contributor to disease, and clinical evidence is mounting for specific effects of stress on immune and cardiovascular systems. Yet, until recently, aspects of stress that precipitate disease have been obscure. The concept of homeostasis has failed to help us understand the hidden toll of chronic stress on the body. Rather than maintaining constancy, the physiologic systems within the body fluctuate to meet demands from external forces, a state termed allostasis. In this article, we extend the concept of allostasis over the dimension of time and we define allostatic load as the cost of chronic exposure to fluctuating or heightened neural or neuroendocrine response resulting from repeated or chronic environmental challenge that an individual reacts to as being particularly stressful."
McEwen, BS. Stellar, E. (1993). Stress and the individual. Mechanisms leading to disease. Archives of internal medicine. 153 (18), pp. 2093–2101.

Why does it mean for you?
"Experience tells us that the social and physical environments in which people live and work have a huge effect upon psychological states.
"Experiences involving social interactions and events in the physical environment are processed by the brain and are usually referred to under the rubric of “stress”. We now know, from animal models, that the brain changes in structure and function with experiences, including those of chronic stress, and that these changes in brain represent “adaptive plasticity”, in that they are largely reversible and appropriate for the conditions that cause them.
"Indeed, the brain is the key organ of the adaptive and maladaptive responses to stress because it determines what is threatening and, therefore, potentially stressful, as well as initiating the behavioural, as well as many of the physiological responses to the stressors, which can be either adaptive or damaging (
McEwen, 1998; McEwen, 2007). Stress involves two-way communication between the brain and the cardiovascular, immune and other systems via the autonomic nervous system and via endocrine mechanisms.
"Beyond the “flight or fight” response to acute stress, there are events in daily life, including the individual life style, that produce a type of chronic stress and lead over time to wear and tear on the body (“allostatic overload”). Yet, the hormones and other mediators associated with stress and adaptation protect the body in the short-run and promote adaptation (“allostasis”).​
"Early life events influence lifelong patterns of emotionality and stress responsiveness and alter the rate of brain and body ageing. The amygdala and prefrontal cortex, as well as the hippocampus, undergo stress-induced structural remodelling, which alters behavioural and physiological responses, including anxiety, aggression, mental flexibility, memory and other cognitive processes."
McEwen, BS. (2009). The Brain is the Central Organ of Stress and Adaptation. Neuroimage. 47 (3), pp. 911–913.
if you are a visual person and prefer to see a diagram, click here
​
The main symptom of Chronic Stress is Fatigue (read more), because stress affect blood sugar levels due to the main stress hormone Cortisol, which can lead to Hypercortisolemia, which can be exacerbated by poor diet and lifestyle choices: 
"Long-term, or Chronic Stress, suppresses or dysregulates immune responses. Because the body does not quite switches back on – and sleep depravation keeps it so –, it is not able to do the tasks it does best: healing and repair. 
Without healing and repair, inflammatory immune cells are activated, inducing low-grade chronic inflammation (generating very little symptoms, at the beginning). This subsequently also “suppressed the numbers and function of Immunoprotective cells,
"Chronic stress hammers away at the cardiovascular system, basically making it work harder and harder. 
With the increase in blood pressure that accompanies repeated stress, damage occurs at branch points of the arteries. 
Adrenaline triggers changes to enhance blood clotting. 
These changes contribute to the development of atherosclerosis.
When the adrenal glands are fatigued they continue to function, but hormones can: 
  • Become depleted.
  • Loose balance with each other.
  • Loose circadian rhythm.
A growing body of scientific research indicates that stress can have profound effects on sleep.
 
The Circadian rhythm of Cortisol is regulated by the sleep-wake cycle. 
Secretions are characterised by a steep increase in the morning, followed by a gradual tailoring off until about midnight (circulating levels are at their lowest).
 
The adrenal hormones are integrally involved in how energy is produced and where it is allocated. 
When blood glucose levels drop, the adrenals release Cortisol which triggers the liver to produce more glucose.
Cortisol increases the amount of glucose available to the brain and muscles and limits energy supplied to digestion, growth and reproduction (nonessential, or even detrimental in a survival situation).

Stress also categorically alters digestive functions. The body cannot afford to waste energy digesting or producing enzymes to digest food and detoxify toxins. Motility is also reduced; gastric juices production is annulled and gastric emptying is slowed down, which can lead to putrefaction of undigested food, thus having a direct impact on the composition of the gut flora, which is also altered by the stress response itself."
​Read the complete article

Sleep is often disturbed and can become quite problematic, when an individual finds hard to fall asleep and/or stay asleep, to feel refreshed in the morning, and keep sugar and Cortisol levels under check.
Recent studies "suggest that sleep disruption may be most detrimental to bone metabolism earlier in life, when bone growth and accrual are crucial for long-term skeletal health," demonstrating that lack of sleep has direct effect on bone mass, and osteoporosis, and it is more detrimental in younger chronically stressed individuals.

A must-read article:
The Endocrine Society. "Prolonged sleep disturbance can lead to lower bone formation." ScienceDaily. ScienceDaily, 2 April 2017. www.sciencedaily.com/releases/2017/04/170402111317.htm.
2 Comments
Frank
25/10/2018 22:07:20

Thanks for the research! Our bodies are a complex biological machine and all sorts of external and internal factors impact our health. It's not an accident. The key to long-term health is taking personal responsibility and not thinking we're a passive victim due to our genes. Our genes are not our destiny, our healthy choices are! "Health comes from healthy habits" (Dr. Alan Goldhammer).

Reply
Olivier
25/10/2018 22:07:59

I totally agree with you.
Our lifestyle and diet counts for 75% of our state of health. Genetic make-up is only the canvas we choose to paint on. We can create a masterpiece, by using knowledge and the right tools, and today there are no longer excuses for ignorance, for médias are inundated with sound advices.
Stress is so very detrimental to health and may have great negative impact on the body functions. Diet is usually the first pillar to fall before the entire roof collapses. When this happens, everything goes down hill and disease sets in, until autoimmune conditions prevent any repair.
It is such a pity that most people think it is the end of the road, that they are no longer entitled to enjoy a full life.
Nutrition offers basis to recovery without side effects; however, not getting there in the first place is the best prevention.
Thank you again for your comment again

TAKING RESPONSIBILITY for everything we do and the choices we make is indeed the key...!

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