Department of Medical Rehabilitation, College of Health Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria.
Chest Unit, Obafemi Awolowo University Teaching Hospitals Complex, P.M.B. 5538, Ile-Ife, Nigeria; Department of Medicine, College of Health Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria.
Ann Phys Rehabil Med. 2017 Nov;60(6):387-392. doi: 10.1016/j.rehab.2017.06.005. Epub 2017 Aug 7.
Chronic obstructive pulmonary disease (COPD) affects respiratory functioning and psychosocial factors. However, little is known about perceived ability of people with COPD to engage in a regular exercise program. This study assessed respiratory parameters, exercise capacity, psychosocial factors and their relations in people with COPD.
This cross-sectional study involved patients with COPD recruited from a Nigerian university teaching hospital. Respiratory parameters including forced expiratory volume in 1sec (FEV) and forced vital capacity (FVC) were assessed by using a spirometer and FEV/FVC ratio was calculated. Participants were sitting upright in a comfortable chair and wearing a nose clip for measurements. The procedure was performed in accordance with the American Thoracic Society criteria. Exercise capacity was assessed by the 6-min walk test (6MWT). Gait speed was assessed by the distance covered in 6min. Perceived exercise self-efficacy (PESE) and rating of perceived exertion (RPE) were assessed by exercise self-efficacy and Borg scales, respectively. Data were analysed using descriptive and inferential statistics. Alpha level was set at P<0.05.
The mean age of the 125 participants was 62.0±7.1years (60% male). The mean values for FEV, FVC and FEV/FVC were 1.8±0.6L, 2.4±0.5L and 58.0±8.8%, respectively, and the mean 6MWT and PESE values were 291.1±41.6m 63.1±11.2%. Exercise capacity was correlated with mean values for the respiratory parameters FEV (r=0.29; P=0.035), FVC (r=0.32; P=0.045) and FEV/FVC ratio (r=0.37; P=0.007), and both exercise capacity and PESE were correlated with gait speed (r=0.96, P=0.001 and r=0.57; P=0.042) and RPE (r=0.42, P=0.050 and r=-0.44; P=0.032), but PESE was not correlated with respiratory parameter values (P>0.05).
Participants with COPD demonstrated reduced respiratory parameter values and low exercise capacity but moderate PESE. We found significant correlations between exercise capacity and respiratory parameter values, but PESE was correlated with only gait speed and RPE. The study has implications for respiratory health promotion and exercise adherence.
慢性阻塞性肺疾病（COPD）会影响呼吸功能和社会心理因素。然而，对于 COPD 患者参与常规运动计划的能力感知，人们知之甚少。本研究评估了 COPD 患者的呼吸参数、运动能力、社会心理因素及其相互关系。
这是一项横断面研究，涉及从尼日利亚一所大学教学医院招募的 COPD 患者。使用肺活量计评估呼吸参数，包括 1 秒用力呼气量（FEV）和用力肺活量（FVC），并计算 FEV/FVC 比值。参与者坐在舒适的椅子上，鼻子夹着，进行测量。该过程按照美国胸科学会的标准进行。通过 6 分钟步行测试（6MWT）评估运动能力。通过 6 分钟内覆盖的距离评估步态速度。通过运动自我效能感量表和 Borg 量表评估感知运动自我效能感（PESE）和感知用力程度（RPE）。使用描述性和推断性统计分析数据。α水平设置为 P<0.05。
125 名参与者的平均年龄为 62.0±7.1 岁（60%为男性）。FEV、FVC 和 FEV/FVC 的平均数值分别为 1.8±0.6L、2.4±0.5L 和 58.0±8.8%，平均 6MWT 和 PESE 值分别为 291.1±41.6m 和 63.1±11.2%。运动能力与呼吸参数的平均值 FEV（r=0.29；P=0.035）、FVC（r=0.32；P=0.045）和 FEV/FVC 比值（r=0.37；P=0.007）相关，运动能力和 PESE 与步态速度（r=0.96，P=0.001 和 r=0.57；P=0.042）和 RPE（r=0.42，P=0.050 和 r=-0.44；P=0.032）相关，但 PESE 与呼吸参数值无关（P>0.05）。
COPD 患者表现出呼吸参数值降低和运动能力低，但感知运动自我效能感中等。我们发现运动能力与呼吸参数值之间存在显著相关性，但感知运动自我效能感仅与步态速度和 RPE 相关。该研究对呼吸健康促进和运动依从性具有重要意义。
