BackgroundThere is limited evidence regarding interactions between pulmonary (dys)function,
posture, and mobility of the upper body quadrant in patients with chronic
obstructive pulmonary disease (COPD).ObjectivesThis exploratory study aimed to investigate whether postural alignment and
mobility of the upper quadrant are related to changes in pulmonary function and
compare such variables between patients with COPD and healthy individuals.MethodFifteen patients with COPD (67.93±9.71yrs) and 15 healthy controls (66.80±7.47yrs)
participated. Pulmonary function (FEV1, FVC) was assessed with
spirometry. Alignment and mobility of the head, thoracic spine, and shoulder were
assessed using digital photographs. Pectoralis minor muscle (PmM) length and
thoracic excursion were assessed with a measuring tape. Groups were compared and
linear regression analyses were used to assess potential relationships between
postural and mobility variables and pulmonary function.ResultsPatients with COPD were more likely to have a forward head position at maximal
protraction (28.81±7.30º vs. 35.91±8.56º, p=0.02) and overall mobility of the head
(21.81±10.42º vs. 13.40±7.84º, p=0.02) and a smaller range of shoulder flexion
(136.71±11.91º vs. 149.08±11.58º, p=0.01) than controls. Patients’ non-dominant
PmM length and maximal head protraction were predictors of FEV1
(r2
adjusted=0.34). These variables, together with the upper thoracic spine
at maximal flexion and thoracic kyphosis at maximal extension, were predictors of
FVC (r2
adjusted=0.68).ConclusionOur findings suggest that impaired pulmonary function is associated with muscle
length and mobility adaptations. Further studies are needed to understand the
underlying mechanisms and clinical value of these relationships.