A new study published in the International Journal of Psychophysiology has found that mindfulness meditation affects brain activity in ways that may reflect increased attentional engagement, rather than simple relaxation. Meditation led to reductions in alpha wave activity, a brain signal often tied to idling or disengagement. These reductions were especially apparent among participants who practiced meditation regularly over a six-week period.
Mindfulness meditation is a mental training practice that involves purposefully focusing attention on the present moment with an attitude of openness and non-judgment. A common technique involves anchoring attention to the breath. When thoughts or distractions arise, the goal is to notice them and gently return attention to breathing. This approach is rooted in contemplative traditions like Buddhism but has increasingly been incorporated into secular settings including psychotherapy, education, and health care.
The practice is often used to cultivate awareness, reduce reactivity to stressful thoughts and emotions, and improve cognitive flexibility. Over the past few decades, research has suggested that mindfulness meditation can contribute to reduced stress, improved emotional regulation, and enhanced well-being. However, the mechanisms behind these benefits remain the subject of ongoing investigation.
While many studies have linked mindfulness to improved health outcomes, there is ongoing debate about how it produces those changes in the brain and body. One candidate mechanism is arousal: meditation may reduce stress and bodily activation. Another possibility is that it enhances attention by training the brain to sustain focus and inhibit distraction. Both possibilities are supported by previous research, but findings have been inconsistent—particularly when it comes to brain activity in the alpha frequency range.
“There has been a considerable rise in the interest and use of mindfulness meditation, particularly for improving well-being. While the benefits are well documented, the mechanisms driving these benefits, especially how they relate to brain and autonomic activity, are only partially understood,” said study author Alexander T. Duda, a PhD Candidate at the Brain & Behaviour Research Institute and School of Psychology at the University of Wollongong.
Alpha waves (typically 8–13 Hz) tend to be strongest when a person is relaxed and has their eyes closed. They often decline when someone is mentally engaged. Some meditation studies have reported increases in alpha, which would suggest a calming effect, while others have found reductions, which might reflect attentional engagement. These inconsistencies may be due to different meditation styles or varying levels of experience among participants.
To better understand these patterns, the researchers used both EEG and skin conductance level (SCL), a measure of sympathetic nervous system activity often associated with arousal. If changes in alpha were tied to reduced arousal, one would expect corresponding changes in SCL. But if alpha reductions occurred without shifts in arousal, this would lend support to an attentional mechanism.
The researchers recruited 42 university students (average age around 21) who had minimal prior experience with meditation. Participants were randomly assigned to one of two groups. One group engaged in 15 minutes of mindfulness meditation each day, while the other listened to classical music for the same amount of time. Both activities were practiced daily over a six-week period.
Before and after the six-week period, all participants came into the lab for two sessions. During each session, they completed periods of eyes-closed rest and a guided mindfulness meditation. EEG data were recorded to measure alpha wave activity, and SCL was measured through electrodes on the fingers to assess changes in bodily arousal. The study also included a trait mindfulness questionnaire (FFMQ) to assess any changes in self-reported mindfulness over time.
The main finding was a significant reduction in alpha activity during mindfulness meditation compared to eyes-closed rest. This pattern was consistent across participants and particularly noticeable in the frontal and posterior regions of the brain. These regions are often associated with attentional processes and emotion regulation. The alpha reductions were more pronounced on the right side of the brain, which some research has linked to emotional processing.
After six weeks, the group that practiced daily meditation showed a smaller reduction in alpha during meditation compared to their earlier session. This change may suggest that with continued practice, the brain becomes more accustomed to the demands of focused attention during meditation. Rather than reflecting a decrease in engagement, this smaller reduction might signal increased efficiency or familiarity with the mental task of mindfulness.
Meanwhile, SCL levels showed no significant difference between the resting and meditation states, either before or after training. This suggests that meditation did not reduce arousal in a meaningful way during the session.
There was, however, a general drop in SCL across both groups from the first session to the second. This decline may reflect a broader decrease in physiological arousal over time, perhaps due to consistent engagement in a calming daily activity. But since both the music and meditation groups showed this effect, it does not appear specific to mindfulness meditation.
Importantly, no correlation was found between alpha wave activity and SCL. In other words, reductions in brain alpha activity during meditation were not tied to changes in bodily arousal. This pattern suggests that the alpha changes are likely due to attention-related mechanisms rather than general relaxation.
“Although mindfulness meditation changed brain activity, these neural shifts were not strongly linked to changes in arousal,” Duda told PsyPost. “This suggests that some of meditation’s benefits may be driven more by attention-related processes than by simple relaxation.”
While many people view meditation as a tool to unwind, this study suggests it may actually place certain demands on the brain—particularly in areas involved in attention. The drop in alpha activity during meditation supports the idea that the brain is shifting from an idle, disengaged state to one of focused awareness. This shift seems to persist over time with practice, at least in modest ways.
The study also highlights the importance of distinguishing between different components of meditation. Not all benefits appear to stem from calming the body; some may arise from exercising and refining attentional control. This distinction may help explain why mindfulness has been linked to improved emotion regulation and cognitive performance, which require more than just physical relaxation.
“Mindfulness meditation can produce meaningful benefits, and these are accompanied by psychophysiological changes,” Duda said. “In this study, meditation altered brain alpha activity in ways that likely reflect improved attention, while arousal levels remained steady.”
One limitation of the study is its small, homogenous sample. Participants were young university students, most of whom had limited meditation experience. This may limit the generalizability of the findings to older adults or clinical populations. Future research should include more diverse samples to explore whether similar patterns occur across different demographics.
Looking forward, “we plan to examine how breathing exercises and specific elements of breath work interact with other aspects of mindfulness meditation to influence both brain and body,” Duda explained. “We have further research underway that builds on these results and will provide new insights into how mindfulness and breath-based practices affect the mind and body.”
The study, “Mindfulness meditation alters alpha amplitude without affecting arousal,” was authored by Alexander T. Duda, Adam R. Clarke, Robert J. Barry, and Frances M. De Blasio.
