title: Antecedents and mediators of physical activity in endometrial cancer survivors: Increasing physical activity through steps to health.
abstract: OBJECTIVE
  Research has shown that physical activity (PA) has a positive effect on cancer survivors, including improving quality of life, improving physical fitness, and decreasing risk for cancer recurrence in some cancer types. Theory-based intervention approaches have identified self-efficacy as a potential mediator of PA intervention. This study examines the temporal relationships at 4 time points (T1-T4) between several social-cognitive theory constructs and PA among a group of endometrial cancer survivors receiving PA intervention.
  
  
  METHODS
  A sample of 98 sedentary women who were at least 6 months posttreatment for endometrial cancer were given interventions to increase their PA. We tested whether modeling, physiological somatic sensations, and social support at previous time points predicted self-efficacy at later time points, which in turn would predict PA at later time points.
  
  
  RESULTS
  Results indicated that, as physiological somatic sensations at T2 decreased, self-efficacy at T3 increased, which led to an increase in PA at T4. This suggests that self-efficacy is a significant mediator between physiological somatic sensations and PA. Exploratory follow-up models suggest that model fit can be improved with the addition of contemporaneous effects between self-efficacy and PA at T3 and T4, changing the timing of the mediational relationships.
  
  
  CONCLUSIONS
  Physiological somatic sensations appear to be an important construct to target to increase PA in this population. Self-efficacy appeared to mediate the relationship between physiological somatic sensations and PA, but the timing of this relationship requires further study. (PsycINFO Database Record
authors: Department of Behavioral Science, University of Texas MD Anderson Cancer Center.
authors: Matthew
authors: M
authors: Cox
authors: Department of Behavioral Science, University of Texas MD Anderson Cancer Center.
authors: Cindy
authors: C
authors: Carmack
authors: Department of Epidemiology and Biostatistics, University of Texas Health Science Center.
authors: Daniel
authors: D
authors: Hughes
authors: Department of Behavioral Science, University of Texas MD Anderson Cancer Center.
authors: George
authors: G
authors: Baum
authors: Department of Gynecological Oncology and Reproductive Medicine, University of Texas MD Anderson Cancer Center.
authors: Jubilee
authors: J
authors: Brown
authors: Department of Radiation Oncology, University of Texas MD Anderson Cancer Center.
authors: Anuja
authors: A
authors: Jhingran
authors: Department of Gynecological Oncology and Reproductive Medicine, University of Texas MD Anderson Cancer Center.
authors: Karen
authors: K
authors: Lu
authors: Department of Behavioral Science, University of Texas MD Anderson Cancer Center.
authors: Karen
authors: K
authors: Basen-Engquist
mesh_terms: D016889:Endometrial Neoplasms / Q000401:mortality / Q000628:therapy*; D015444:Exercise / Q000523:psychology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D011788:Quality of Life; D017741:Survivors / Q000523:psychology*
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