Influence of Gender and Inspiratory Muscle Training on the Perception of Dyspnea in Patients With Asthma

“Men and women respond differently to asthma. Maximal inspiratory mouth pressure (PImax), ?2-agonist consumption, and perception of dyspnea (POD) were measured in 22 women and 22 men with mild persistent-to- moderate asthma. Next, the women were randomized into two groups: those who received inspiratory muscle training and those who received sham training. The training ended when the PImax of the training group was equal to that of the male subjects. POD was then measured once again.”


“Our study shows that the inspiratory muscles in women could be trained within 20 weeks to reach the same strength as in their male counterparts. This increase in inspiratory muscle strength completely concealed the gender differences in POD and ?2 -agonist consumption, suggesting that the gender differential in maximal inspiratory muscle strength is responsible for the fact that women are more symptomatic than men. However, other possibilities for the gender differences could not be negated in our study, and further investigations are needed to completely clarify the issue.”

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The Relationship Among Inspiratory Muscle Strength, The Perception Of Dyspnea And Inhaled Beta2-Agonist Use In Patients With Asthma

“It is well documented that the perception of dyspnea (POD), subjectively reported by patients, is related to the activity and strength of the inspiratory muscles, and influences the use of ‘as needed’ beta2-agonists. This study investigated the relationship among the increase in inspiratory muscle strength after specific inspiratory muscle training, beta2-agonist consumption and the POD in patients with persistent, mild to moderate asthma.”


“In patients with mild to moderate, persistent asthma, there is a correlation between the POD and the mean daily beta2-agonist consumption. When the inspiratory muscles are strengthened, there is a significant decrease in the POD and in beta2-agonist consumption.”

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Specific IMT In Patients With Mild Asthma With High Consumption Of Inhaled Beta2-Agonists

“It has been known for many years that there are variations between asthmatic patients in terms of their perception of breathlessness during airway obstruction. This study investigated the relationship between 2-agonist consumption and the score of perception of dyspnea, in mild asthmatics, and the relationship between the effect of specific inspiratory muscle training (SIMT) on the score of perception of dyspnea and ?2-agonist consumption in ‘high perceivers’.”


“Patients with mild asthma, who have a high ?2-agonist consumption, have a higher perception of dyspnea than those with normal consumption. In addition, specific inspiratory muscle training was associated with a decrease in perception of dyspnea and a decrease in ?2-agonist consumption.”

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