title: Reliability and validity of the Exercise Self-Regulatory Efficacy Scale for individuals with chronic obstructive pulmonary disease.
abstract: BACKGROUND
  Exercise has important benefits for individuals with chronic obstructive pulmonary disease (COPD). However, to sustain long-term benefits of exercise, adherence is needed. Adherence requires self-regulation. No scale is available to measure exercise self-regulation in individuals with COPD.
  
  
  OBJECTIVE
  We developed and tested the reliability and validity of an "Exercise Self-Regulatory Efficacy Scale (Ex-SRES)" for individuals with COPD.
  
  
  METHODS
  A convenience sample of 109 subjects with COPD was recruited. Cronbach's alpha was used to assess the internal consistency reliability of the Ex-SRES. Subjects' exercise behaviors and health status were used to assess the validity of the Ex-SRES.
  
  
  RESULTS
  The Ex-SRES demonstrated evidence of reliability (Cronbach's alpha .917) and validity (correlation with minutes of exercise per week [r = .41; P < .0001] and health status [r = .37; P < .0001]).
  
  
  CONCLUSIONS
  The Ex-SRES is a short (16-items) and easy to use questionnaire that may be valuable for assessing patients in clinical settings, as well as for future research studies in behaviors related to exercise.
authors.affiliation: College of Nursing, University of Arizona, Tucson, Arizona 85721-0203, USA.
authors.forename: Amy H T
authors.initials: AH
authors.lastname: Davis
authors.forename: Aurelio José
authors.initials: AJ
authors.lastname: Figueredo
authors.forename: Bonnie F
authors.initials: BF
authors.lastname: Fahy
authors.forename: Tassanee
authors.initials: T
authors.lastname: Rawiworrakul
mesh_terms: D000368:Aged; D035841:Behavioral Research; D003430:Cross-Sectional Studies; D015444:Exercise / Q000502:physiology / Q000523:psychology*; D005260:Female; D005541:Forced Expiratory Volume; D006801:Humans; D008297:Male; D008875:Middle Aged; D010349:Patient Compliance / Q000523:psychology*; D011594:Psychometrics / Q000295:instrumentation*; D029424:Pulmonary Disease, Chronic Obstructive / Q000451:nursing / Q000628:therapy*; D012648:Self Care / Q000523:psychology*; D020377:Self Efficacy; D011795:Surveys and Questionnaires; D013997:Time Factors; D014797:Vital Capacity