Background
respiratory diseases, respiratory distress, musculoskeletal problems, thoracic kyphosis
RESPIRATORY DISEASE, STILL, COVID-19 INFECTION, COMPLICATIONS
The older people are prone to a high risk of respiratory diseases, such as COVID-19 infection. The Covid-19 pandemic has induced significant physical and mental problems among old people [With aging, physiological changes occur that can affect the performance of various body organs, including the cardiorespiratory and musculoskeletal systems and posture [Therefore, performing breathing exercises, including those strengthening the respiratory muscles of the chest and boosting lung function (such as deep and calm breathing training, diaphragmatic breathing, and chest exercises) can improve the respiratory condition of affected people and mitigate the stress imposed on the respiratory distress and other related organs [In this regard, Liu et al. (2020) investigated the effect of six weeks of respiratory rehabilitation exercises on the respiratory function, quality of life, mobility, and psychological function of the elderly infected with COVID-19. The results showed significant improvements in FEV1, FEV1/FVC percentage, and the 6-min walking test in the intervention group after six weeks of respiratory rehabilitation [Clinical evidence has shown that proper respiratory rehabilitation can enhance the prognosis of recovered and discharged COVID-19 patients, maximize the preservation of lung function, and improve their quality of life. Still, there are insufficient studies in the world about the effectiveness of these interventions [In old people, the high rate of musculoskeletal problems and weak postures such as thoracic kyphosis, forward head, and round shoulder posture, can be associated with physiological complications such as reduced lung volume and respiratory capacity [