Brief summary describing the background
and objectives of the trial
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Sickle cell disease (SCD) is a general term for a group of genetic disorders characterized by the predominance of sickle cell hemoglobin, HbS (John, 2010). Sickle cell anaemia (SCA) refers to homozygous sickle hemoglobin (HbSS) state, it remains the most common and severe form (Quinn, Rogers & Buchanan, 2004). HbSS is caused by inheritance of homozygous mutant haemoblobin S (HbS), and accounts for 60-75% of the patients with SCD (Gladwin, & Taylor, 2008).
SCA remains a major genetic disease in most countries in Sub-Saharan Africa, Nigeria inclusive (WHO, 2015). The prevalance is highest in Nigeria making Nigeria the country with highest number of SCA in the world and Africa patients than any other country in the world (Therrell & Hannon, 2006; Sagir et al, 2010).
HbSS genotype is associated with more severe hemolytic anaemia and increased risk of cardiovascular and pulmonary complications than the heterozygous sickle hemoglobin genotype (Gladwin, & Taylor, 2008). These complications represent a diverse group of diseases affecting the large and small airways parenchyma, vasculature and are leading and early causes for morbidity and mortality in this population (Mehari & Kling, 2016). They are characterized by disorders such as chronic dyspnea, asthma, recurrent wheezing without a diagnosis of asthma, cough, pulmonary hypertension, pulmonary fibrosis, thrombo-embolic disease, abnomnal lung function and sleep-disordered breathing (Machado & Gladwin, 2005).
Physical exercise is considered to be an important supplementary modality in the treatment of different chronic diseases (Adegoke, Akinola & Oyeyemi, 2015). Also, inspiratory muscle training is shown to be useful in management of respiratory conditions(Weiner, 1992). However, both of these interventions are sparsely used as an entity or a combination in this population despite their benefits, therefore, this study intends to explore the combined
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