A recent study conducted in the Czech Republic has shed light on the unexpected adverse effects of Samadhi meditation, a practice often promoted for its mental and physical health benefits. The study, which Silvie Kotherová and her team are leading, emphasizes the possibility that meditation can cause significant autonomic nervous system reactions, such as nausea, in people who are new to the practice. The findings were published in the Journal of Religion and Health.
Samadhi meditation, a form of focused attention meditation rooted in Buddhist traditions, is widely regarded for its ability to induce relaxation and improve emotional stability. However, this new study challenges the perception of meditation as a universally beneficial practice, revealing that for some individuals, it may provoke discomfort and adverse physiological responses.
The study focused on 57 university students, with an average age of 22.6, all of whom had no prior experience with meditation or yoga. The participants were observed during three phases: before, during, and after a 10-minute session of Samadhi meditation. Researchers monitored their autonomic nervous system activity, paying particular attention to heart rate variability (HRV), a measure of the balance between sympathetic (fight-or-flight) and parasympathetic (rest-and-digest) nervous system activity.
One of the study’s key findings is the link between meditation-induced nausea and sympathetic nervous system activation. While Samadhi meditation is generally associated with increased parasympathetic activity, leading to relaxation, the researchers found that for 21% of the participants, the practice triggered heightened sympathetic activity instead. This was particularly evident in 12 participants who reported significant nausea during meditation, a symptom often associated with motion sickness and other forms of physiological stress.
These findings support the idea that meditation does not uniformly produce calming effects. Instead, the study suggests that individuals with a predisposition to heightened sympathetic nervous system responses may experience adverse effects, such as nausea, when engaging in meditation practices intended to promote relaxation.
The study’s results raise important questions about the appropriateness of meditation as a one-size-fits-all solution for mental health and stress management. While meditation is often integrated into therapeutic practices for anxiety and depression, the findings suggest that for some individuals, particularly those with an overactive sympathetic nervous system, meditation could exacerbate discomfort rather than alleviate it.
The researchers point out that the participants who experienced high levels of nausea during meditation also reported greater difficulty and discomfort with the practice. This suggests that awareness of personal responses to meditation is crucial, and that individuals who find meditation challenging may require additional support or alternative techniques to achieve the desired benefits.
Kotherová and her team stress the need for further research to better understand the mechanisms behind meditation-induced adverse effects. They argue that while the benefits of meditation are well-documented, the potential risks – especially for novice practitioners – warrant careful consideration. The study underscores the importance of personalised approaches in mental health interventions, rather than assuming that meditation is universally beneficial.
The researchers also call for more comprehensive reporting of adverse effects in studies on meditation and mindfulness, noting that the lack of such data in existing literature may contribute to an overly positive portrayal of these practices. By documenting and understanding the potential downsides of meditation, healthcare providers can better tailor interventions to individual needs, ensuring that meditation remains a safe and effective tool for those who can benefit from it.
