Discussion
a decrease in Systolic and Diastolic Pressure, fatigue, Dyspnea, USI, COPD
COPD
The purpose of this randomized controlled trial was to explore the effects of a respiratory training program including a specifically designed tool for the inspiratory phase and aerobic exercise, compared to a traditional respiratory training and aerobic exercise, in post-COVID participants. Both groups experimented improvement in cardiorespiratory parameters, with a decrease in Systolic and Diastolic Pressure, Dyspnea and Lower Limbs fatigue (measured with the Modified Borg Scale), and increased Oxygen Saturation, 6MWD, Diaphragmatic thickness, FVC, FEV1, FEV1/FVC, PEFR, FIVC and MIP. Cardiac Frequency is unexplainable higher in the post intervention measurement, pointing to an internal validity error involving the order in which participants were evaluated in the 6MWD test and Cardiac Frequency register, as the participants plausibly presented an augmented frequency after the effort (The design of the study included block randomization regarding sex. Differences in women immune response, specifically in COVID-19, have been analyzed in recent literature (The results of the present study, favor the use of an inspiratory device, combined with aerobic exercise, in post COVID patients. Respiratory rehabilitation has shown a definitely positive impact in COVID subjects, both in face to face and in telematic interventions (Inspiratory muscle training has been also studied in scientific literature for other pathologies such as COPD (A Cochrane Library systematic review by The results of our study support the generalization of the use of these tools, combined with aerobic exercise, for the improvement of chronic COVID-19 symptoms.Previous levels of physical activity were not recorded in this study. However, a recent study by Regarding diaphragmatic thickness measured by ultrasound imaging (USI), both groups showed improvement, with no statistically significant difference between them. These results are coincident with previous publications reporting increased diaphragm thickness after pulmonary training, measured with USI (