It is a double-blind randomized clinical trial study. Each participant will be randomly assigned to one of the following groups: 1) Exercise training program + Inspiratory muscle training + Expiratory muscle training, 2) Exercise training program + Sham Inspiratory muscle training + Sham Expiratory muscle training.~The exercise training program will be delivered in hospital and will be applied 2 sessions per week during 8 weeks. The exercise component will be lasted for 1hour and it consisted of cardiovascular exercises.~The respiratory muscle training program will be applied twice a day, 3 sessions per week during 8 weeks by a threshold device. The evening sessions will be supervised by a physiotherapist through a virtual platform.~Participants received baseline assessments at the beginning of the intervention and post-intervention assessments at the end of the 8th week.
The main objective of the present study is to observe the short-term effects of respiratory muscle training combined with an exercise training program on quality of life and exercise tolerance in individuals with long-term post-COVID-19 symptoms. As secondary objectives, the effects on respiratory muscle function, physical and lung function, as well as on the psychological state of these individuals.