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Hormesis may be an unfamiliar term, but it influences our day-to-day wellbeing throughout our lives. Research is showing that it may be an effective way to boost our overall health and resilience, so let’s take a look how it works and how to tap into it.

What is Hormesis?

We generally think of stress on our bodies as a bad thing. However, if we want to be resilient to stress, we need to actually be exposed to stressors. Here the science of hormesis shows that dosage is a critical factor as to whether our biological systems adapt positively or negatively.

Hormetic type responses have been reported in diverse fields of study, including aging, exercise physiology, immunology, medicine, and nutrition. The general principle is that built into your biology is the ability to sense and respond to environmental stressors to be become stronger and healthier. Vice versa, a lack of stressors over time can actually make us weaker.

A well-researched practice of this effect is fasting. Even though starvation is usually harmful for the body, in short dosages it is now well-known to produce significant long term health benefits for both the body and brain.

Exercise and Hormesis

Intensive exercise actually damages the body through generating mild oxidative stress. However growing evidence suggests that oxidative stress is very important for upregulating the signaling pathways that are required to promote overall adaptations through increased physical fitness.

Furthermore, it appears to play a more general role in helping create a shield for the body to become more resilient to factors like illnesses and accelerated aging.

Understanding Stress Loads

Achieving a balance of healthy stressors has been dubbed eustress. The key point, is that it is not simply the type of stress that matters, but also the load and duration of how much stress we induce.

Chronic exposure to stress commonly results in negative effects, which may partly be because the effects of stress are cumulative over time, and also because our bodies are not getting enough breathing room to respond and adapt.

Achieving a balanced exposure is referred to as ‘stress inoculation’, leading to increased resilience. The strategy is to systematically expose ourselves to a controlled dose of the stressor.

Leveraging Hormesis Through HITT

HITT (High Intensity Interval Training) is an exercise technique which has garnered much sports science credibility in recent years. The principle is based on working out extremely intensely but in very short doses, in order to achieve the equivalent fitness benefits of much larger amounts of training.

One of the proposed mechanisms for this is a strong biphasic hormetic response on mitochondria - the powerhouses which drive energy release in every cell in our body. Consequently HITT training has also been found to be beneficial for cognitive functions.

Fortunately, the training loads to stimulate optimal hormesis responses via HITT have been well studied. Although it will vary depending on the individual, just 3 x 20 minutes per week of intensive cardio and/or resistance training will yield significant physiological benefits for most people.

Takeaways

Hormesis is our in-built biological ability to respond positively to physiological stressors, in order to become more resilient. Exposure to acute doses of exercise is one way to harness positive stress. HITT training is a well-established and effective way to promote overall health and wellbeing.

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