Bamonti Patricia M, Wingood Mariana, Robinson Stephanie A, Rose Grace A, Moy Marilyn L
Research & Development Service, VA Boston Healthcare System, Boston, MA, USA; Department of Psychiatry, Harvard Medical School, Boston, MA, USA.
Department of Implementation Science, Wake Forest University School of Medicine, Winston-Salem, NC, USA; Sticht Center for Healthy Aging and Alzheimer's Prevention, Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA.
Respir Med. 2025 Sep;246:108228. doi: 10.1016/j.rmed.2025.108228. Epub 2025 Jul 1.
Physical activity (PA) promotion is an essential component of managing chronic obstructive pulmonary disease (COPD). Exercise self-efficacy is a primary indicator of exercise engagement. The Exercise Self-Regulatory Efficacy scale (Ex-SRES) was developed and validated in persons with COPD recruited at pulmonary rehabilitation programs who self-reported exercise behaviors. Our study evaluates its psychometric properties using objective assessments of PA and exercise capacity.
Secondary analyses were performed on baseline assessments of U.S. Veterans with COPD who participated in two PA intervention studies (N = 210; age M = 69 ± 8; 97 % male; 91.9 % White). The Ex-SRES asked how confident participants felt they could exercise 3X/week for 20 min given 16 barriers. The Omron HJ-720 or Fitbit Zip pedometer assessed daily step counts for 7-10 days and the 6-min walk test (6 MWT) assessed exercise capacity. Breathlessness was assessed with the Modified Medical Research Council Dyspnea Scale (mMRC). The St. George Respiratory Questionnaire (SGRQ) assessed health-related quality of life; participants self-reported confidence and motivation for exercising regularly. Exploratory factor analysis (EFA) assessed the underlying factor structure of the Ex-SRES and internal consistency reliability. Convergent validity was evaluated through correlations with objective and subjective measures.
EFA resulted in a one-factor structure accounting for 58.28 % of the common variance. The Ex-SRES demonstrated convergent-type validity: daily step counts (ρ = .17), 6 MWT distance (ρ = .22), mMRC (ρ = -.15), SGRQ (ρ = -.24), motivation (ρ = .42), and confidence (ρ = .58) (p's < .05) and internal consistency reliability (Cronbach's α = .95) CONCLUSION: Objective measures of PA and exercise capacity confirm the psychometric properties of the Ex-SRES.
促进身体活动（PA）是管理慢性阻塞性肺疾病（COPD）的重要组成部分。运动自我效能是运动参与的主要指标。运动自我调节效能量表（Ex-SRES）是在参加肺康复项目且自我报告运动行为的慢性阻塞性肺疾病患者中开发并验证的。我们的研究使用身体活动和运动能力的客观评估来评估其心理测量特性。
对参加两项身体活动干预研究的美国慢性阻塞性肺疾病退伍军人的基线评估进行二次分析（N = 210；年龄M = 69±8；97%为男性；91.9%为白人）。Ex-SRES询问参与者在面对16种障碍时，他们觉得自己每周进行3次、每次20分钟运动的信心如何。欧姆龙HJ-720或Fitbit Zip计步器评估7至10天的每日步数，6分钟步行试验（6MWT）评估运动能力。使用改良医学研究委员会呼吸困难量表（mMRC）评估呼吸困难情况。圣乔治呼吸问卷（SGRQ）评估与健康相关的生活质量；参与者自我报告定期锻炼的信心和动机。探索性因素分析（EFA）评估Ex-SRES的潜在因素结构和内部一致性可靠性。通过与客观和主观测量的相关性评估收敛效度。
探索性因素分析得出一个单因素结构，占共同方差的58.28%。Ex-SRES显示出收敛型效度：每日步数（ρ = 0.17）、6MWT距离（ρ = 0.22）、mMRC（ρ = -0.15）、SGRQ（ρ = -0.24）、动机（ρ = 0.42）和信心（ρ = 0.58）（p值<0.05）以及内部一致性可靠性（Cronbach'sα = 0.95）。结论：身体活动和运动能力的客观测量证实了Ex-SRES的心理测量特性。
