| Title | Acute effects of inspiratory loading in older women: Where the breath meets the heart. | ||
| Author | Rodrigues, Gabriel Dias; Gurgel, Jonas Lirio; Goncalves, Thiago Rodrigues; da Silva Soares, Pedro Paulo | ||
| Journal | Respir Physiol Neurobiol | Publication Year/Month | 2021-Mar |
| PMID | 33249217 | PMCID | -N/A- |
| Affiliation + expend | 1.Department of Physiology and Pharmacology, Fluminense Federal University, Niteroi, Brazil. Electronic address: gabrieldias@id.uff.br. | ||
We tested the hypothesis that inspiratory resistive loading (IRL) increases vagal-mediated complexity of heart rate variability (HRV) in older women. We recorded heart rate continually during 30 breaths with Sham or IRL (30 % of maximal inspiratory pressure) in sitting position. The normalized spectral power in the low (LFn) and high (HFn) frequency bands and the symbolic dynamics measures for 0 V, 2UV and 2 L V were obtained. HFn was higher and LFn was lower during IRL than Sham (p < 0.05). During IRL, 2UV component increased more than Sham (p < 0.05) while 0 V index remained unchanged (p> 0.05). In conclusion, acute IRL improved vagal modulation index of both linear (spectral analysis) and non-linear analysis (symbolic dynamics) in older women.