title: A prospective investigation of the relationships between self-presentation processes and physical activity in women treated for breast cancer.
abstract: OBJECTIVE
  In the current study, we (a) describe naturally occurring changes in self-presentation processes (i.e., impression motivation, impression construction) and moderate-to-vigorous intensity physical activity (MVPA) over a period of 6 months among women who were treated for breast cancer; (b) evaluate the associations of cancer-specific factors with self-presentation processes and MVPA; and (c) examine the within- and between-person associations of self-presentation processes with MVPA.
  
  
  METHODS
  For this prospective longitudinal study, women (n = 128; Mage = 55.14 years) completed questionnaires posttreatment for breast cancer (Mtime since treatment = 3.96 months), as well as 3 and 6 months later.
  
  
  RESULTS
  Based on the findings of the multilevel analysis, self-presentation processes remained stable over time, whereas MVPA levels changed over time (Blinear = 6.11, SE = 2.44, Bquadratic = -3.41, SE = 1.23). Radiotherapy was related to impression motivation (B = -.40, SE = .19) and impression construction (B = -.45, SE = .15), and chemotherapy was related to impression motivation (B = .31, SE = .15). Impression motivation was associated with MVPA at the between-person level (γ₀₁ = 5.72, SE = 1.22), and impression construction was associated with MVPA at the between- and within-person levels (γ₀₁ = 3.45, SE = 1.49; γ₁₀ = 3.67, SE = 1.66).
  
  
  CONCLUSIONS
  This study provides insight into the patterns of self-presentation processes and MVPA during early cancer survivorship, as well as the associations between these constructs at the within- and between-person levels. Based on these findings, more research is needed to determine whether self-presentation processes should be conceptualized as state or trait characteristics or as having both components, and extend the self-presentation framework to incorporate additional explanatory variables as this might provide a more complete explanation of MVPA.
authors.affiliation: School of Human Kinetics, University of Ottawa.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Brunet
authors.affiliation: Faculty of Kinesiology & Physical Education, University of Toronto.
authors.forename: Catherine M
authors.initials: CM
authors.lastname: Sabiston
authors.affiliation: School of Psychology, University of Ottawa.
authors.forename: Patrick
authors.initials: P
authors.lastname: Gaudreau
mesh_terms: D000328:Adult; D000368:Aged; D001828:Body Image / Q000523:psychology; D001943:Breast Neoplasms / Q000523:psychology* / Q000628:therapy; D015444:Exercise / Q000523:psychology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009042:Motivation; D055361:Multilevel Analysis; D011446:Prospective Studies; D012649:Self Concept; D011795:Surveys and Questionnaires; D017741:Survivors / Q000523:psychology* / Q000706:statistics & numerical data; D013997:Time Factors