how connection developsWhen participants in a small laboratory study recited the Ave Maria in Latin or repeated a yoga mantra, their breathing settled close to six breaths a minute. They had received no instruction to achieve that particular rate. The repeated words provided a rhythm that their breathing followed.
In their 2001 comparative study, Luciano Bernardi and colleagues examined what happened to several cardiovascular signals during these practices. The finding gives a concrete account of one physical feature of rhythmic recitation. An activity organized around words and sound also organized the timing of breath.
A rhythm carried by the words
The researchers studied 23 healthy adults under several conditions. They recorded spontaneous breathing, ordinary talking, recitation of the prayer, repetition of a mantra, and breathing deliberately paced at six breaths a minute. During the prayer, one participant recited one part and another gave the response. The participants had no previous experience of yoga and received brief instruction in the mantra before the study. They learned to listen to their own resonant voice, finish each out-breath comfortably, and pause when needed. The instruction gave the practice a particular form, even though it did not prescribe a breathing rate.
The comparison with ordinary talking was especially useful. Speech changes breathing because we organize our breath around what we say. Both ordinary conversation and repeated recitation slowed breathing compared with breathing spontaneously. Their patterns differed, however, in how regularly the breaths followed one another.
During spontaneous breathing, the average rate was about 14 breaths a minute. During ordinary talking it fell to about eight, with considerable variation in the spacing of breaths. Prayer and mantra recitation brought the average rate close to six and made it much more regular. Their average regularity approached that observed with deliberately timed breathing, although the study was not designed to establish that the methods were equivalent.
A repeated phrase therefore did more than occupy the time between breaths. It supplied a recurring structure. Ordinary speech, with its changing sentence lengths and pauses, produced a different breathing pattern even though it also slowed the average rate.
Several bodily rhythms moving together
Heart rate and blood pressure fluctuate over time. In this study, the researchers were interested in how those fluctuations related to breathing. They measured the intervals between heartbeats, blood pressure, and the velocity of blood flow in a cerebral artery, alongside respiration.
During prayer and mantra recitation, the main oscillations in these signals occurred at the same frequency. Their fluctuations became more pronounced and more closely aligned with the slow respiratory rhythm. The authors interpreted this as a form of resonance. A breathing cycle lasting roughly ten seconds was close to the period of an existing cardiovascular rhythm, so the repeated cycles could reinforce one another.
This is what synchronization means in the paper. The measured rhythms within a person's body became more closely coordinated. Although the prayer included alternating voices, the research did not establish that different participants' hearts synchronized with each other. That would require a different comparison.
The distinction also helps explain why an increase in variability was meaningful here. The researchers were observing a regular rise and fall in cardiovascular signals, rather than treating every kind of fluctuation as the same phenomenon. The timing and organization of the changes were central to their interpretation.
The body's response to changes in blood pressure
The study also examined baroreflex sensitivity. The baroreflex helps regulate blood pressure by adjusting cardiovascular activity in response to changes in pressure. Here, sensitivity was estimated from the relationship between fluctuations in blood pressure and the intervals between heartbeats.
Baroreflex sensitivity was higher during prayer and mantra recitation than during ordinary talking. The recitations’ numerical values were also higher than during spontaneous breathing, but the table did not report those differences as statistically significant. Deliberately paced slow breathing did produce a significant difference from spontaneous breathing. The strongest comparison for the recitations was therefore with another speaking activity.
These findings concern short periods of recitation in healthy adults. Deliberately paced breathing was always tested last, which limits that comparison because the order itself might have influenced the results. The experiment did not follow participants for clinical outcomes. A change in this physiological estimate therefore cannot tell us whether taking up either practice would improve someone’s health over time.
Words, pauses, and the timing of breath
The prayer and mantra came from different traditions, yet produced similar breathing patterns in this experiment. Their repetitive timing was a shared physical feature. That observation concerns one part of the experience. The study measured physiological rhythms, while the meaning of the words and any feelings of calm or closeness remained outside its measurements.
A person reciting a phrase need not count breaths for the phrase to give breathing a pace. Attention can stay with the words and their sound. The arrangement of words, pauses, and repetition can itself provide the timing.
Sources
Bernardi, L., Sleight, P., Bandinelli, G., Cencetti, S., Fattorini, L., Wdowczyc-Szulc, J., & Lagi, A. (2001). Effect of rosary prayer and yoga mantras on autonomic cardiovascular rhythms: Comparative study. BMJ, 323(7327), 1446–1449. Full text.