Scientists have discovered why even a casual walk can improve your mood

Important: The study shows a link, not definitively proving that movement always directly improves mood in everyone.

Details

The work was carried out by scientists from Ruhr University Bochum, Paris Lodron University of Salzburg, Karlsruhe Institute of Technology and the Central Institute of Mental Health in Mannheim. The results are published in Nature Human Behaviour.

The researchers used data from 67 international scientific groups. The analysis included more than 300,000 mood questionnaires from more than 8,000 participants. This is one of the largest papers on the relationship between everyday movement and emotional state.

Unlike laboratory experiments, real everyday life was studied here. Smartphones, wearable devices and regular questionnaires were used to record how much people moved and how they felt at different points in the day.

It turned out that people generally felt better before and after physical activity. The link to feeling energised was particularly consistent: over 95% of participants felt more energetic before or after movement.

But there was a nuance: calmness, on the contrary, decreased. That is, a person could feel more awake and better after movement, but not necessarily more relaxed.

The study also showed the flip side of the connection: people were more likely to move when they were already in a good mood. So movement and emotional well-being probably reinforce each other.

Why it matters

Many people know that physical activity is beneficial, but knowledge alone is often not enough to get people moving more. New work shows that motivation can be found not only in the long-term health benefits, but also in the short-term effects: even a little movement during the day can be linked to better well-being.

The link was particularly noticeable in people with lower levels of wellbeing. According to the authors, this emphasises the potential of daily movement for people who are psychologically more vulnerable.

However, the scientists emphasise: the data does not yet prove causality. More intervention studies are needed to understand whether movement actually improves mood in each case and how this can be used in therapy or prevention.

Background

Previously, the benefits of movement on mood have more often been studied in laboratories or in studies where people were assessed at a single point in time. The new work is important because it relies on everyday data: participants lived ordinary lives, and devices and questionnaires recorded their activity and state multiple times throughout the day.

This allows us to better understand not only the general principle of "sport is good for you", but also a more practical thing: mood can be related to simple daily activities - walking, climbing the stairs, doing the cleaning, leaving the house.

But that doesn't mean that movement has the same effect on everyone. Most participants had better moods near periods of activity, but some people had lower moods. So the authors think it's important to further explore personal and contextual factors: what type of activity works best for whom and in what situation.

Source

Johanna Rehder et al. An individual participant data meta-analysis of how physical activity relates to affective well-being in daily life is published in Nature Human Behaviour in 2026. The authors combined data from 67 international research groups, more than 8,000 participants and more than 300,000 mood questionnaires to examine the relationship between daily activity and emotional well-being.