Hiking works: What research says about mountains and health

You know the feeling: after a hike, you are tired but your mind feels clearer, you are calmer and somehow more content. That is no coincidence or imagination. Research can now explain what lies behind it.

Mountain hiking combines three things that are each good for you in their own right: moderate endurance exercise, contact with nature and distance from everyday life. Together, they create an effect that is greater than the sum of its parts. Best of all, you do not need extreme training. An ordinary day hike is enough.

One of the most important studies on the subject came from the Deutscher Alpenverein, working with the Deutsche Hochschule für Gesundheit und Sport in Berlin. The research team led by Prof. Dr Sven Sohr followed 24 highly stressed people for a full year. The participants hiked in every season, completing four mountain tours spread across the year.

The findings were clear: cortisol levels, the body’s key stress hormone, fell significantly after the hikes. At the same time, positive feelings such as contentment, calm and even gratitude increased measurably. Negative emotions such as anxiety and low energy declined.

Particularly interesting was that the effect built up over time. Every individual hike contributed, and after a year a lasting effect was measurable: overall, the participants had become more resilient to stress.

The study also revealed a surprising observation: the physical effort involved in mountain hiking was objectively greater than for a comparison group on treadmills, but it was not perceived as more strenuous. More on that in a moment.

Hiking is endurance training in its most natural form. The effort is steady, easy to regulate and remarkably effective. Here are the key physical effects supported by studies:

Heart and circulation: Regular hiking trains the cardiovascular system gently yet effectively. Blood pressure demonstrably falls, especially in people with mildly elevated blood pressure. Even easy hikes have positive effects.

Muscles, bones and joints: Uphill walking strengthens the leg muscles, while downhill walking develops stability in the knees and ankles. The varied load of uneven terrain strengthens bones, tendons and ligaments in a way that a flat treadmill does not.

Metabolism and weight: Hiking activates fat burning and can have a positive effect on blood sugar and insulin levels. As an accessible endurance activity, it is particularly suitable for people who are overweight.

Immune system: Moderate exercise produces killer cells and activates the immune system. The stress hormone cortisol, which suppresses immune defences, is reduced through hiking. Sunlight stimulates vitamin D production, while trees release substances known as phytoncides, volatile plant compounds that studies suggest may further improve immune function.

Scientific studies confirm the link between regular endurance training and stronger immune defences, particularly in older people.

Perhaps the most surprising finding from the research is this: the special effect of mountain hiking does not come from exercise alone. The environment plays a decisive role.

In the Alpine Association study, the objective strain of mountain hiking was sometimes higher than on a treadmill: heart rate and energy expenditure exceeded the comparison values. Yet participants did not perceive the mountain hike as more strenuous. On the contrary, they reported lower subjective stress levels.

Research explains this through several factors:

• Open views and panoramas draw attention away from exertion
• Natural stimuli such as birdsong, wind and flowing water unconsciously reduce the stress response
• Distance from everyday life — no mobile signal, no to-do list, no screen
• Elevation gain and changing scenery create a sense of progress and reward

A comprehensive review in Frontiers in Public Health (2025/2026) confirms these findings on a broader basis: hiking not only improves physical fitness, but also offers measurable benefits for mental health and social wellbeing.

A 2026 systematic review in the Journal of Environmental Psychology analysed 25 studies from nine countries and concluded that nature-based exercise programmes are not merely helpful for many people — they can be an effective intervention in their own right.

The mental effects of hiking go beyond a short-lived high. The evidence shows:

Stress reduction: Just 30 minutes of exercise in nature can measurably lower stress hormone levels. With regular hiking, this effect becomes more lasting as the body learns to regulate stress more effectively.

Mood and calm: The Alpine Association study recorded increased satisfaction, calm and inner peace after every mountain hike. Negative emotions such as restlessness and anxiety decreased.

Cognitive performance: Studies suggest that hiking in nature can improve attention, working memory and cognitive flexibility. The rhythmic motion of walking, combined with natural sensory stimuli, appears to stimulate the brain in a particular way.

Long-term resilience: In a study commissioned by BKK Pfalz at SRH Hochschule für Gesundheit, 70 per cent of participants reported higher subjective wellbeing after regular health hiking than at the start. The effect was especially clear among those who had initially scored below average.

Research also shows the other side: the positive effect can reverse if you push yourself too hard. Anyone regularly going beyond their limits produces more stress hormones, not fewer. The dose makes the difference.

Moderate hikes, where you can still hold a conversation without becoming breathless, bring the greatest health benefits. Current research projects are even working to map hiking trails by cardiovascular strain, so you can match hikes more closely to your fitness level.

For beginners, the rule is simple: shorter and regular is better than one big annual challenge. The Alpine Association study shows that the effect builds over several hikes — consistency beats intensity.