The effects of inspiratory muscle training on lung function and respiratory muscle strength in adults with sedentary behavior: preliminary data

Abstract

Background: Sedentary lifestyle have wide-ranging adverse impacts on health including increased risk of mortality, cardiovascular disease, cancer, and risks of metabolic disorders. These lifestyle directly negative influences on respiratory systems. Inspiratory muscle training is a simple and safe method that has been shown clinically improve respiratory function. Therefore, the method is benefit for reducing the risks of sedentary lifestyle.

Objective: To compare effects of inspiratory muscle training on lung function and respiratory muscle strength among adults with sedentary behavior

Materials and Methods: Current study was randomized controlled trial. Twenty sedentary adults were randomly assigned to inspiratory muscle training and control groups, ten adults in each group. Sedentary lifestyle was assessed by using Baecke Habitual Physical Activity Questionnaire (BHPAQ). Inspiratory muscle training was individually performed 15 times/set, complete 2 set each day, 5 day a week, for 4 weeks. Lung function and inspiratory and expiratory muscle strength were measured pre- and post-training. Unpaired-t test and paired-t test were used for analysis of outcomes. The significant different was set at 0.05.

Results: The sedentary time of participants were 7.25±0.78 hours/day. Participants’ ages range between 18-25 years.  The inspiratory muscle training was superior significant increase in lung function (FEV1, FVC, FEV1/FVC, and PEFR) and respiratory muscle strength between two groups (p<0.001). Lung function outcomes were significant difference between pre- and post-inspiratory muscle training (p<0.001).

Conclusion: The 4-week inspiratory muscle training effectively enhanced lung function and respiratory muscle strength in adults with sedentary behavior.