Peter T. Katzmarzyk, Kara D. Denstel, Kim Beals, Jordan Carlson, Scott E. Crouter, Thomas L. McKenzie, Russell R. Pate, Susan B. Sisson, Amanda E. Staiano, Heidi Stanish, Dianne S. Ward, Melicia Whitt-Glover and Carly Wright
Javier Brazo-Sayavera, Cecilia del Campo, María José Rodríguez, Inacio Crochemore Mohnsam da Silva, Eugenio Merellano-Navarro and Pedro R. Olivares
Marianella Herrera-Cuenca, Betty Méndez-Pérez, Maritza Landaeta-Jiménez, Xiomarys Marcano, Evelyn Guilart, Luis Sotillé and Rosalba Romero
Lowri C. Edwards, Richard Tyler, Dylan Blain, Anna Bryant, Neil Canham, Lauren Carter-Davies, Cain Clark, Tim Evans, Ceri Greenall, Julie Hobday, Anwen Jones, Marianne Mannello, Emily Marchant, Maggie Miller, Graham Moore, Kelly Morgan, Sarah Nicholls, Chris Roberts, Michael Sheldrick, Karen Thompson, Nalda Wainwright, Malcolm Ward, Simon Williams and Gareth Stratton
Taru Manyanga, Nyaradzai E. Munambah, Carol B. Mahachi, Daga Makaza, Tholumusa F. Mlalazi, Vincent Masocha, Paul Makoni, Fortunate Sithole, Bhekuzulu Khumalo, Sipho H. Rutsate and Tonderayi M. Matsungo
Maria-Christina Kosteli, Jennifer Cumming and Sarah E. Williams
Limited research has investigated exercise imagery use in middle-aged and older adults and its relationship with affective and behavioral correlates. The study examined the association between self-regulatory imagery and physical activity (PA) through key social cognitive variables. Middle-aged and older adults (N = 299; M age = 59.73 years, SD = 7.73, range = 50 to 80) completed self-report measures assessing self-regulatory imagery use, self-efficacy, outcome expectations, perceived barriers, self-regulatory behavior, enjoyment, and PA levels. Path analysis supported a model (χ²  = 21.76, p = .08, CFI = .99, TLI = .97, SRMR = .03, RMSEA = .04) whereby self-regulatory imagery positively predicted self-efficacy, outcome expectations, and self-regulatory behaviors. Furthermore, self-regulatory imagery indirectly predicted barriers, outcome expectations, self-regulation, enjoyment, and PA. This research highlights self-regulatory imagery as an effective strategy in modifying exercise-related cognitions and behaviors. Incorporating social cognitive constructs into the design of imagery interventions may increase PA engagement.
Keishi Soga, Keita Kamijo and Hiroaki Masaki
We investigated how aerobic exercise during encoding affects hippocampus-dependent memory through a source memory task that assessed hippocampus-independent familiarity and hippocampus-dependent recollection processes. Using a within-participants design, young adult participants performed a memory-encoding task while performing a cycling exercise or being seated. The subsequent retrieval phase was conducted while sitting on a chair. We assessed behavioral and event-related brain potential measures of familiarity and recollection processes during the retrieval phase. Results indicated that source accuracy was lower for encoding with exercise than for encoding in the resting condition. Event-related brain potential measures indicated that the parietal old/new effect, which has been linked to recollection processing, was observed in the exercise condition, whereas it was absent in the rest condition, which is indicative of exercise-induced hippocampal activation. These findings suggest that aerobic exercise during encoding impairs hippocampus-dependent memory, which may be attributed to inefficient source encoding during aerobic exercise.
René van Bavel, Gabriele Esposito, Tom Baranowski and Néstor Duch-Brown
Normative messages have been shown to increase intention to do physical activity. We traced how “positive” and “negative” normative messages influenced physical activity intention by comparing constructs of the model of goal-directed behavior with descriptive norms (MGDB + DNs) across control and treatment groups in an experiment. For this purpose, 16–24-year-old respondents (n = 1,200) in Bulgaria, Croatia, and Romania were asked about their age, sex, and levels of physical activity before being exposed to positive and negative normative messages and completing a questionnaire with MGDB + DNs scales. Different MGDB + DNs constructs were influenced by the normative messages: compared with the control, the negative message group showed stronger attitudes (p = .003) and the positive message group showed higher positive anticipated emotions (p = .005). The positive message’s effect is consistent with the literature on conformity to social norms. The negative message’s effect lends itself to interpretations based on social identity and deviance regulation theories.
Claudio Sartini, Richard W Morris, Peter H Whincup, S Goya Wannamethee, Sarah Ash, Lucy Lennon and Barbara J Jefferis
Sedentary behavior is very common in older adults and a risk factor for mortality. Understanding determinants of sedentary behavior may help in defining strategies aimed to reduce the time spent sedentary. The degree of difference in sedentary time attributable to varying temperatures has not been yet estimated in older men.
Men aged 71 to 91 years participating in an established UK population-based cohort study were invited to wear an Actigraph GT3X accelerometer for 1 week in 2010–12. Outcome was sedentary time (<1.5 Metabolic Equivalent of Task) in minutes per day. Associations between daily outdoor maximum temperature and accelerometer-measured sedentary time were estimated using multilevel models.
43% (1361/3137) of invited men participated in the study and provided adequate data. Men spent on average 615 minutes in sedentary time per day (72% of the total accelerometer-wear time). After adjusting for covariates, men spent 26 minutes more per day (P < .001) in sedentary time when temperatures were in the lowest (–3.5; 9.2°C) versus highest quintile (19.1; 29.5°C).
Sedentary time in older adults is highest at lowest temperatures, typically recorded in winter. Findings are relevant for guidelines: interventions may consider targeting older men in winter providing recommendations for minimizing sedentariness on daily basis.