Respiratory Muscle Endurance in Obesity Hypoventilation Syndrome
Respiratory Muscle Endurance in Obesity Hypoventilation Syndrome
Obesity hypoventilation syndrome (OHS) is defined as a combination of obesity [body mass
 index (BMI) ≥30 kg/m2], chronic daytime hypercapnia (PaCO2 >45 mm Hg), and sleep-apnea in the
 absence of other known causes of hypercapnia. Respiratory system compliance decreases and
 resistance increases in OHS. This causes increase in work of breathing and oxygen cost of
 breathing, which may result in respiratory muscle fatigue. Increase in respiratory workload
 and increase in resistance to respiration is expected to decrease in respiratory muscle
 endurance (RME) in subjects with OHS.
In the literature, studies evaluating RME in subjects with OHS are limited. No study has been
 found to evaluate RME using the incremental load test in subjects with OHS. Accordingly, it
 was aimed to evaluate and compare respiratory muscle endurance in subjects with OHS and a
 control group, and to determine factors associated with respiratory muscle endurance.
Inclusion Criteria:

 -  Diagnosed with OHS

 -  Obese subjects (30 < body mass index < 40 kg/m2) with low risk of obstructive sleep
 apnea (STOP-BANG score < 3)

 Exclusion Criteria:

 -  Severe respiratory disease

 -  Subjects with orthopeadic and/or neurologic disorders that could limit exercise tests