I'm sharing lots of articles and videos below, but wanted to inbtroduce these topics briefly first...
In today’s fast-paced, hyperconnected world, many of us are living in a state that our nervous systems were never designed for: constant low-grade stress. That absolutely was me, especially so as a result of being self-employed. Emails, notifications, traffic, financial pressure and social comparison all
quietly activate the body’s threat response. Over time, this can leave us feeling wired, tired, irritable, anxious, or emotionally flat. I have come close to burnout on a couple of occasions. Learning how to “reset” your nervous system – and understanding heart rate variability (HRV) – offers a practical, neuroscience-based way to protect your mental and physical health.
Your Nervous System: Built for Survival, Not Notifications
On a basic and simplified
level…. The autonomic nervous system has two main branches: the sympathetic (“fight or flight”) system and the parasympathetic (“rest and digest”) system. When you perceive threat, the brain’s alarm centre – the amygdala – signals for the release of stress hormones such as adrenaline and cortisol. Heart rate increases, breathing quickens, and attention narrows.
This response is lifesaving in emergencies. But in modern life, the “threats” are often psychological rather than physical.
Chronic activation keeps the body in a defensive state, which research links to anxiety, sleep disruption, inflammation and cardiovascular strain.
Resetting the nervous system means deliberately activating the parasympathetic branch, particularly through the vagus nerve. Practices such as slow diaphragmatic breathing, mindfulness, cold exposure, social connection and gentle movement have all been shown in neuroscience research to enhance parasympathetic tone and calm the stress
response.
What Is Heart Rate Variability (HRV)?
Many people assume a steady heartbeat is a healthy one. In fact, a healthy heart does not beat like a metronome. The tiny variation in time between each heartbeat is called heart rate variability.
Higher HRV generally reflects a flexible, adaptive nervous system – one that can efficiently shift between activation and relaxation. Lower HRV is associated with chronic stress, depression, anxiety and
increased risk of cardiovascular disease.
From a neuroscience perspective, HRV is a useful marker of how effectively the brain regulates the body. The prefrontal cortex – involved in emotional regulation and decision-making – helps modulate stress responses. Higher HRV is associated with stronger “top-down” regulation, meaning you are better able to respond thoughtfully rather than react impulsively.
Why HRV Matters in Modern Life
In a world of
constant stimulation, HRV gives us an objective measure of resilience. Wearable devices now allow individuals to track HRV daily. While not perfect diagnostic tools, they can reveal patterns: poor sleep, overtraining, alcohol consumption, illness and psychological stress often reduce HRV.
Importantly, HRV is trainable. Studies show that slow breathing at around 5–6 breaths per minute can significantly increase HRV by stimulating vagal activity. Mindfulness meditation has also been linked
to improvements in HRV and emotional regulation. Regular aerobic exercise, adequate sleep and meaningful social connection all support healthier variability.
Resetting as a Daily Practice
Resetting your nervous system is not about eliminating stress – that is impossible. It is about building flexibility. Brief, intentional regulation practices throughout the day – a few minutes of slow breathing, stepping outside for natural light, reducing digital
overload, or engaging in supportive conversation – can shift the body out of chronic defence.
In today’s modern world, resilience is not just psychological. It is physiological. By understanding and monitoring HRV, and by consciously activating the body’s calming systems, we create the conditions for clearer thinking, steadier emotions and long-term health.
