Key result
Emotional stress induced by a modified Trier Social Stress Test significantly increased median respiratory rate from 0.25 Hz during relaxation to up to 0.34 Hz during stress stages (p<0.05).
Why the study?
Does emotional stress induced by a modified Trier Social Stress Test alter respiratory frequency and stability in healthy volunteers?
Observational (n=25)
No
Does emotional stress induced by a modified Trier Social Stress Test alter respiratory frequency and stability in healthy volunteers?
Respiratory rate increases and respiratory stability decreases during emotional stress, suggesting these parameters could be useful for objective stress level assessment.
Respiratory parameters may aid objective stress assessment in research; leaves open clinical diagnostic utility.
In this work, we analyze changes in respiration during emotional stress induced by a modification of the Trier Social Stress Test. The following stages in the test were analyzed: the pre-relaxing stage, the story telling stage, the anticipation of stress and the video exposition stage. Respiration signal is recorded during the whole test using a thoracic band. Power spectral density (PSD) of respiration is computed in running windows using a modification of Welch periodogram in which sufficiently peaked spectra are averaged. Then, respiratory frequency (F R ) is estimated from the “peaked-conditioned” averaged spectra. Results show that respiratory rate is significantly (p <; 0.05 according to the Friedman test) higher, while a measure of spectral peakness and the percentage of PSD used to compute (F R ) is lower during stress stages than during relax. These results suggest that the respiration-related parameters have potential discrimination power for stress level assessment.
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Hernando et al. (2015) conducted an observational in Healthy (n=25). Emotional stress (modified Trier Social Stress Test) vs. Pre-relaxing stage (baseline) was evaluated on Median respiratory rate (FmR) (p=<0.05). Emotional stress induced by a modified Trier Social Stress Test significantly increased median respiratory rate from 0.25 Hz during relaxation to up to 0.34 Hz during stress stages (p<0.05).
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