Why Study or Use Sanskrit in Yoga Class?
Heart of Yoga Class: February 7, 2026
By Laura Spaulding
(Note: this article was prepared with assistance of AI. The views expressed
here are my own.)
1. Studies on
“OM” Chanting and Physiological Effects
- Heart Rate
Variability (HRV) is the difference between the heart rate at inhalation
and exhalation. In a healthy individual the heart rate speeds up with
inhalation and slows down with exhalation. This is a marker of autonomic
nervous system balance — higher HRV usually reflects more
parasympathetic (rest-and-digest) activity. If there is little or no difference
between the rates, this can be an indicator of poor health, often related
to chronic conditions such as cardiovascular disease, diabetes and
digestive conditions. A controlled study measured heart rate
variability (HRV) before and after chanting OM. The study found
that even five minutes of loud OM chanting increased parasympathetic
activity, suggesting relaxation and calmness effects, especially in
experienced yoga practitioners. [1]
- The increase
in high-frequency HRV power after chanting suggests a shift toward a
calmer physiological state, which is one of the mechanisms through
which meditation and yogic breathing reduce stress. [2]
2. Reviews on
Mantra and Chanting
- Narrative
reviews and conceptual papers argue Om chanting can modulate brain
activity and cognitive function, influencing memory, attention, and
emotional regulation through sensory and autonomic pathways — though many
of these are not large clinical trials but summarizations of smaller
studies and theories. [3]
3. Brain
Activation and “Sanskrit Effect”
- Research
into long-term memorization and chanting of Sanskrit Vedic verses
(ancient oral traditions) suggests structural brain changes. One
neuroscience observation (often referenced as the “Sanskrit Effect”) found
that seasoned Vedic chanters showed greater grey matter in regions
linked to memory and auditory processing, indicating cognitive
benefits from learning and recitation. [4]
🌀 Mechanisms
Backed by Scientific Inquiry
While not all research is Sanskrit-specific, several
mechanisms have scientific support in related meditation and mantra studies:
Breathing and
Autonomic Regulation
- Chanting
inherently involves slow, rhythmic breathing, which has been widely
studied in pranayama research: slow breathing itself increases vagal
tone and boosts parasympathetic activity, leading to relaxation.
Studies on chanting mirror these physiological changes. [5]
Brain Wave and
Stress Response
- Mantra
chanting — including Sanskrit sounds — has been associated with increased
alpha and theta brainwave activity in EEG studies. These patterns
correlate with relaxation and lowered stress. [6]
Focus, Memory,
and Neural Plasticity
- Language
learning and especially memorizing complex structured language like
Sanskrit activates memory systems and may enhance cognitive function. This
aligns with broader research showing that structured verbal repetition and
focused attention train neural networks. [7]
📌 What Researchers
Emphasize
- Most
rigorous studies are small and often involve short chanting sessions or
cross-sectional designs (comparing experienced chanters vs novices). [8]
- Large randomized
clinical trials specifically on Sanskrit chanting as a medical
intervention are still rare.
- Mechanistic
evidence (heart rate, brain waves, respiration) tends to be stronger than
direct clinical outcomes like disease reduction.
🧩 Summary of
Scientific Findings
Evidence suggests that chanting Sanskrit in a yogic
context can:
✔ Increase parasympathetic nervous system activity
and relaxation (via HRV).
✔ Modulate brain wave patterns associated with calm
attention.
✔ Potentially strengthen memory and cognitive
networks in long-term practitioners.
✔ Provide a mindful, focused breathing pattern that
reduces stress — similar to other forms of meditative breathing.
Limitations to keep in mind:
- Many studies
are small, observational, or narrative reviews rather than large clinical
trials.
- Some claims
(e.g., immune or cardiovascular benefits) are inferred from mechanisms
rather than proven in large human studies. [9]
🧠What This Means
for Yoga Practitioners
If your goal is stress reduction, nervous system
balance, and enhanced mindfulness, there is relatively good evidence that chanting
sounds like OM as part of yoga/pranayama can be beneficial. If your goal is
specific medical outcomes (e.g., treatment of clinical depression or
hypertension), the scientific evidence is still preliminary and should
be integrated with broader medical care.
[1] Immediate
Effects of OM Chanting on Heart Rate Variability Measures Compared Between
Experienced and Inexperienced Yoga Practitioners https://pmc.ncbi.nlm.nih.gov/articles/PMC9015091/?utm_source=chatgpt.com
[2] Immediate
Effects of OM Chanting on Heart Rate Variability PMC9015091
[3] Exploring
the Effects of Om Chanting on Cognitive Functions of Individuals: A Narrative
Review
https://jaims.in/index.php/jaims/article/view/4168?utm_source=chatgpt.com
[4] https://www.sanatan.org/en/a/100086.html?utm_source=chatgpt.com
[5] Autonomic
and Respiratory Modulations Induced by Different Styles of Mantra Chanting
https://pmc.ncbi.nlm.nih.gov/articles/PMC12181178/?utm_source=chatgpt.com
[6] Autonomic
and Respiratory Modulations Induced by Different Styles of Mantra Chanting
[7] https://www.sanatan.org/en/a/100086.html
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