Mental & Neurological Adaptations
Movement doesn't just change your body—it reshapes your brain, boosts your mood, and strengthens your mental resilience. Whether it is a short walk, a strength session, or a long hike - consistent physical activity triggers both immediate and long-term changes in how your brain functions and how you feel.
Mood, Stress & Emotional Resilience
- Immediate effects: A single session of movement—like a 20–30 minute walk or jog—can noticeably lift your mood, reduce anxiety, and increase feelings of calm and well-being. (Basso and Suzuki)
- Long-term effects: With regular movement, these mood improvements stack up. Over time, exercise can significantly reduce symptoms of depression and is now recommended as an evidence-based treatment option for depression and depressive symptoms. (Heissel et al.)
- How it works: Movement can help rebalance brain chemicals (like serotonin and norepinephrine), improve sleep, builds confidence, and can help lower baseline stress levels.
- Resilience building: People who move regularly tend to cope with stress better and are less likely to develop mood disorders. In fact, physical activity has been shown to reduce the risk of future depression. (Heissel et al.) (Pearce et al.)
Walking and Brain Adaptation
Regular walking benefits the body and likely actively shapes the brain. A 2025 systematic review investigated the effects of walking on the hippocampus, one of the key brain structures involved in memory.
🌿 Key result: All 12 of the studies included in the review showed a positive effect on hippocampal volume.
Some other key results:
- 🏃 Intensity seems to matter - both low and vigorous intensity walking were related to different changes.
- 🗺️ Environment, spatial navigation, built environment complexity, and exposure to nature are all variables that appear to impact hippocampal volume change due to walking.
→ "The subiculum volume, a part of the hippocampus associated with spatial orientation and memory and even involved in the body's stress response, "increased after low-intensity walking and nature exposure."
→ "The parahippocampal gyrus (a structure important in memory storage) benefited from vigorous intensity" walking.
Big picture: Science is doing its thing and is still figuring out the specifics of what and how walking affects brain health, but it is pretty clear that it does. On top of that, the body of scientific research generally concludes that walking can increase your brain volume!
💡What you can do: Try it for yourself. Go for a walk and measure your hippocampal volume… well… I mean, if you can't do that, then just see how you feel before and afterwards, and you can decide for yourself if you think it is a good thing;-) (Khalil)
Brain Health, Cognitive Function & Neuroplasticity
- Sharper thinking: Exercise (especially aerobic training) improves memory, attention, processing speed, and decision-making (executive function). These benefits are seen across all ages and are even relevant for older adults. Although it doesn't not appear to benefit working memory. (Smith et al.)
- Brain structure changes: Aerobic exercise has been shown to increase the size of the hippocampus (your brain's memory center), particularly the right side, which is linked to spatial awareness and navigation—skills you constantly use while hiking. (Khalil)
Neuroplasticity & Learning
- Movement literally rewires your brain. Exercise increases BDNF (brain-derived neurotrophic factor)—a key ingredient for neural development and function - even including the building of new nervous system tissue (neurogenesis).
- It can also impact learning and memory in the brain through dendritic (I.e. the branching extension of neurons) growth and long-term potentiation (a mechanism where synapses strengthen).
- Exercise primes the brain to learn. After a workout, the brain is in a heightened state of readiness—more plastic, more adaptable, and better at absorbing new information.
- Also, regular exercise even resulted in increasing the effects of a single session of exercise on BDNF levels! (Szuhany et al.)