Introduction : Brain fog is not just a mental problem
In recent years, more and more people are reporting symptoms such as mental fog, a drop in concentration, decreased focus and a feeling of “cognitive fatigue”. These symptoms are often attributed to stress, digital overload, or hormonal imbalances.
However, modern neurophysiology increasingly points to one overlooked factor: the quality and variety of movement.
The brain is not an isolated system. It is continuously dependent on the sensorimotor information it receives from the body. When movement is restricted, repetitive, or minimized, the stimulation that maintains neuroplasticity is also reduced.
The brain is a sensorimotor organ
One of the key changes in the modern understanding of the brain is the abandonment of the idea that it is primarily the “cognitive center”. Much of the cerebral cortex is dedicated to processing movement and sensory input.
Functional magnetic resonance imaging studies show that even simple movements activate a wide network of brain regions, including:
- motor cortex
- somatosensory cortex
- cerebellum
- frontal lobes
When the movement is diverse and coordinated, the activation is even wider.
This means that movement is not just a physical action – it is a direct stimulation of the brain.
Movement and neuroplasticity: the role of BDNF
One of the most researched molecules in the context of the brain and movement is BDNF (brain-derived neurotrophic factor). BDNF is a protein that supports neuronal survival, the growth of new synaptic connections, and long-term brain plasticity.
Numerous studies show that regular physical activity increases BDNF levels. It is particularly interesting that the combination of aerobic activity and coordinated movement has a pronounced effect on synaptic plasticity.
BDNF is essential for:
- Learning
- Memory
- adaptation to stress
- prevention of cognitive decline
Movement, therefore, acts as a biological signal to the brain to remain adaptive.
Coordination and executive functions
Modern research shows that more complex forms of movement (balance, change of direction, coordination of arms and legs) more strongly activate the frontal regions of the brain that are responsible for:
- Decision-making
- Planning
- Attention
- inhibition of impulses.
In other words, a movement that requires attention and adaptation stimulates executive functions.
This explains why monotonous, repetitive activity has less effect on cognitive stimulation compared to varied movement.
Sitting, rigidity, and decreased sensorimotor input
Prolonged sitting and static movement patterns reduce the variability of sensory input. When the body remains in the same position for hours, the activation of proprioceptive receptors decreases.
Modern research has increasingly linked reduced movement variability to:
- A drop in attention
- Subjective Sense of Mental Fog
- reduced energy
In fact, the brain receives less information to process. And less information means less stimulation of adaptive mechanisms.
Movement and stress regulation
Chronic sympathetic activation affects the functions of the prefrontal cortex, the region responsible for rational thinking and decision-making. When the body is under constant strain or tension, some of the cognitive capacity is spent on regulating the threat.
Low- and medium-intensity movement helps regulate the autonomic nervous system, reducing excessive sympathetic activation. This frees up the capacity for focus and clearer thinking.
Mental clarity is often the result of body regulation.
A long-term perspective: movement and cognitive ageing
One of the most reliable indicators of healthy aging is the preservation of adaptability. Research on longevity shows that walking speed, balance, and coordination are strongly linked to cognitive health in old age.
Movement keeps the sensorimotor maps active and flexible. When the body moves in a variety of ways, the brain receives a signal that it needs to remain adaptable.
Adaptability is the foundation of long-term mental health.
Conclusion : Movement feeds the brain
Mental clarity is not just the result of rest or mental techniques. It is the result of continuous, varied stimulation of the brain throughout the body.
Movement:
- increases neuroplasticity
- Stimulates executive functions.
- regulates stress
- Supports long-term adaptation.
In The Science of Feeling Better, we see movement as the foundation of mental health, not just physical form.
Because a body that moves in a variety of ways helps the brain stay clear, adaptive, and stable.
