title: Bidirectional Associations Between Psychological States and Physical Activity in Adolescents: A mHealth Pilot Study.
abstract: To understand the predictors and consequences of adolescent moderate-to-vigorous physical activity (MVPA) and sedentary behavior in nearly real-time.
  
  
  
  Participants were 26 adolescents ( M age = 15.96, SD  = 1.56) who provided 80 self-reports of subjective states and continuous objective reports of MVPA and sedentary behavior over 20 days.
  
  
  
  Random effects were observed for all of the models with affect and feeling variables predicting MVPA. There was a negative fixed effect for within-person positive affect and sedentary behavior and the inverse association for negative affect. Within-person MVPA was a significant positive predictor of positive affect and energy. There was a random effect for within-person MVPA and fatigue. There was a significant random effect for within-person sedentary behavior predicting positive affect. Within-person sedentary behavior was a significant negative predictor of energy.
  
  
  
  Findings highlight the importance of the intrapersonal nature of the associations among subjective states and physical activity.
authors.affiliation: Clinical Child Psychology Program, University of Kansas,  Sunnyside Ave, Lawrence, USA.
authors.forename: Christopher C
authors.initials: CC
authors.lastname: Cushing
authors.affiliation: Clinical Child Psychology Program, University of Kansas,  Sunnyside Ave, Lawrence, USA.
authors.forename: Tarrah B
authors.initials: TB
authors.lastname: Mitchell
authors.affiliation: Clinical Child Psychology Program, University of Kansas,  Sunnyside Ave, Lawrence, USA.
authors.forename: Carolina M
authors.initials: CM
authors.lastname: Bejarano
authors.affiliation: Department of Medicine, Creighton University  Medical Center, Omaha, NE, USA.
authors.forename: Ryan W
authors.initials: RW
authors.lastname: Walters
authors.affiliation: Computer Science Department, Oklahoma State University,  Stillwater, OK, USA.
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Crick
authors.affiliation: Clinical Child Psychology Program, University of Kansas,  Sunnyside Ave, Lawrence, USA.
authors.forename: Amy E
authors.initials: AE
authors.lastname: Noser
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D004644:Emotions; D015444:Exercise / Q000523:psychology*; D005221:Fatigue / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D015233:Models, Statistical; D010865:Pilot Projects; D000297:Psychology, Adolescent; D057185:Sedentary Behavior; D057566:Self Report; D017216:Telemedicine
keywords: adolescents; computer applications/ehealth; health behavior; health promotion and prevention