International Journal of Behavioral Nutrition and Physical Activity最新文献

{"title":"The experiences of night shift workers following three different dietary weight loss interventions: a qualitative study using behaviour change theory.","authors":"Corinne Davis, Sue Kleve, Catherine E Huggins, Maxine P Bonham","doi":"10.1186/s12966-025-01750-7","DOIUrl":"10.1186/s12966-025-01750-7","url":null,"abstract":"<p><strong>Background: </strong>Shift workers are an estimated 15%-30% of the workforce in developed countries, who are disproportionally at risk of living with overweight or obesity. Dietary guidance is a component recommended for obesity management, however lacks consideration of the lifestyle and circadian disruption experienced by night shift workers. There is a lack of evidence addressing both weight loss and the metabolic consequences of eating at night. Intermittent fasting (IF) may provide metabolic benefits if fasting is aligned with night shifts. The Shifting Weight using Intermittent Fasting in night shift workers study compares three weight-loss interventions: 1) continuous energy restriction (CER); or twice-per-week IF with 2) fasting during night shifts or 3) day fasting. This study aims to explore the experiences of participants while following the interventions to understand how intervention features and external enablers or barriers influence engagement.</p><p><strong>Methods: </strong>Forty-seven semi-structured interviews (22 baseline, 25 follow-up) were conducted with 33 participants. Eighteen participants also completed optional fortnightly audio diaries to enrich data collected on experiences over time. Interviews and diaries were analysed using the five-steps of framework analysis and themes were deductively mapped to behaviour change frameworks and the social-ecological model.</p><p><strong>Results: </strong>Analysis resulted in seven major themes and 27 subthemes. Three main themes describe intervention factors influencing engagement: 1) Simplicity and ease, 2) Support and accountability, and 3) An individualised approach is sometimes needed. Four themes described external factors to the interventions influencing engagement: 4) Personal motivation and attitudes, 5) Physiological influences of eating behaviours, 6) Social support at home and work, and 7) Work structure and environment.</p><p><strong>Conclusions: </strong>Across all three interventions, participants valued the ease of interventions, which was the clear dietary prescription and focus on two days per week for IF, or a focus on small changes for CER. Behavioural regulation and providing meals/snacks were identified as critical features. Modifications to address identified enablers/barriers include: providing flexible fasting periods; addition of fatigue management initiatives; increased focus on non-weight related health changes during periods of slowed weight-loss; implementation in workplace settings to harness social support; and providing a healthier food environment.</p>","PeriodicalId":50336,"journal":{"name":"International Journal of Behavioral Nutrition and Physical Activity","volume":"22 1","pages":"64"},"PeriodicalIF":5.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12117937/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144175641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Population level effects of the active kids program on children and adolescents' physical activity and sport participation in NSW, Australia.","authors":"Katherine B Owen, Bridget C Foley, Lindsey J Reece, William Bellew, Adrian Bauman","doi":"10.1186/s12966-025-01763-2","DOIUrl":"10.1186/s12966-025-01763-2","url":null,"abstract":"<p><strong>Background: </strong>Active Kids was a universal program that aimed to reduce the cost of sport and active recreation programs for all school-enrolled children and adolescents (4.5-18 years) in New South Wales (NSW), Australia through provision of $100 vouchers. This study assesses trends in physical activity and sport participation in children and adolescents in NSW during its implementation to determine population level program effects.</p><p><strong>Methods: </strong>This study used the Active Kids program data from January 31 2018 to December 31 2022. Children and adolescents who registered in the program provided physical activity and sport participation data each year. The NSW Population Health Survey (PHS) and NSW AusPlay data measured the same outcomes from 2017 to 2022 in representative samples of the population. We calculated weighted prevalence estimates for physical activity and sport participation each year, and by age, gender, and socioeconomic status.</p><p><strong>Results: </strong>In the five-years of Active Kids program implementation, there was a slight decrease in the proportion of children and adolescents meeting physical activity guidelines (2018: 19.3%, 95% CI 19.2-19.4; 2022: 16.1%, 95% CI 16.0-16.2). In PHS between 2017 and 2022, there was also a slight decrease in the proportion of children and adolescents meeting physical activity guidelines (2017: 32.6%, 95% CI 29.1-36.0; 2022: 27.9%, 95% CI 24.4-31.5), with a larger drop in 2020 (24.4%, 95% CI 20.8-27.9). In the same period (2018-2022), there was a decrease in the proportion of children and adolescents who participated in sport at least once per week (2018: 70.3%, 95% CI 70.2-70.4; 2022: 53.6%, 95% CI 53.5-53.7). There was also a decrease in the proportion of children and adolescents who participated in sport at least once per week between 2017 and 2021 (2017: 78.2% 95% CI 74.5-81.9; 2021: 63.4%, 95% CI 60.1-66.8), with a slight increase in 2022 (69.8%, 95% CI 66.7-72.9).</p><p><strong>Conclusions: </strong>We found no increases in overall population levels of physical activity or sport participation among children and adolescents in NSW between 2017 and 2022. The single-component, universal program design should be modified, using targeted behaviour change theories, to address inequalities and stimulate population-level increases in physical activity and sport participation.</p><p><strong>Trial registration: </strong>Australian New Zealand Clinical Trials Registry (ACTRN12618000897268).</p>","PeriodicalId":50336,"journal":{"name":"International Journal of Behavioral Nutrition and Physical Activity","volume":"22 1","pages":"65"},"PeriodicalIF":5.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12117741/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144175637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Usage and effectiveness of strategies to sit less and move more: evaluation of the BeUpstanding™ national implementation trial.","authors":"Genevieve N Healy, Elisabeth A H Winkler, Samantha K Mulcahy, Charlotte L Brakenridge, Ana D Goode","doi":"10.1186/s12966-025-01761-4","DOIUrl":"10.1186/s12966-025-01761-4","url":null,"abstract":"<p><strong>Background: </strong>Addressing prolonged workplace sitting is an identified priority. A national implementation trial of BeUpstanding™ - an online workplace intervention supporting teams of desk-based workers to sit less and move more - successfully reduced worker sitting time in a large sample of workers. However, it is unclear which strategies workers used to sit less and move more, how usage changed following intervention, and how this related to changes in work activity and sitting.</p><p><strong>Methods: </strong>BeUpstanding collected data from staff before and after the 8-week champion-delivered intervention regarding self-reported work behaviours (percentage of worktime sitting and moving; percentage sitting in prolonged bouts) and the usage (0 = never to 4 = always/nearly always) of 21 sit less/move more strategies (13 emphasised 'move more'). Strategy usage during versus before intervention were compared via linear mixed models. Strategy usage (0-4) and changes (-4-4) were tested in relation to post-intervention behaviours and behaviour changes using linear mixed models. Interaction tests and conditional inference trees compared strategies in their effectiveness.</p><p><strong>Results: </strong>Across 1614 staff (43.1 ± 11.3 years; 66% female) from 66 workplaces, the number of strategies used at least sometimes averaged 9.56 (SE = 0.19) pre-intervention. Strategy usage increased significantly (p < 0.05) in the number of strategies used (2.45 [95% CI: 2.18, 2.73], p < 0.001), mean strategy usage (0.37 [0.33, 0.41], p < 0.001), move-more strategy usage, and for every strategy except active travel. Every strategy was used by > 10% of staff following intervention. Strategy usage and changes were significantly associated with all behaviours and behaviour changes (all p < 0.01). There were significant differences in the strength of these associations between strategies (p < 0.05) and for move-more strategies versus other strategies (p < 0.05); however, no strategies were statistically counterproductive. Conditional inference trees identified various combinations of strategies whose usage predicted outcomes.</p><p><strong>Conclusions: </strong>All strategies showed acceptability (used by > 10%), most were modifiable (increased with intervention), and, to varying degrees, their usage was associated with work behaviours. Findings suggest all 21 strategies are suitable for Australian desk-based workers to select based on personal and contextual fit. Strategies most strongly linked with all behaviours or targeted behaviours (i.e., increasing movement) might be emphasised to enhance effectiveness.</p><p><strong>Trial registration: </strong>ACTRN12617000682347. The trial was prospectively registered on the 12th May, 2017 (ACTRN12617000682347) before the soft launch online and last updated on the 11th June 2019, before the national implementation trial recruitment commenced (12th June, 2019).</p>","PeriodicalId":50336,"journal":{"name":"International Journal of Behavioral Nutrition and Physical Activity","volume":"22 1","pages":"63"},"PeriodicalIF":5.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12117936/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144175656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Parental use of structure-based and autonomy support feeding practices with children with avid eating behaviour: an Ecological Momentary Assessment study.","authors":"Katie L Edwards, Abigail Pickard, Claire Farrow, Emma Haycraft, Moritz Herle, Clare Llewellyn, Helen Croker, Alice Kininmonth, Jacqueline Blissett","doi":"10.1186/s12966-025-01768-x","DOIUrl":"10.1186/s12966-025-01768-x","url":null,"abstract":"<p><strong>Background: </strong>Avid eating is an eating profile which confers greater risk for childhood obesity and can be challenging for parents to manage. Using Ecological Momentary Assessment (EMA), we have previously shown that parental mood, feeding goals, and eating context determine parents' use of coercive and indulgent feeding practices. Parents have also reported using specific noncoercive practices which provide structure (e.g., modelling) or autonomy support (e.g., nutrition education) when feeding children with avid eating behaviour more effectively. However, research is yet to examine the momentary predictors of these adaptive feeding practices.</p><p><strong>Method: </strong>This EMA study aimed to examine parental mood, goals, and context as momentary predictors of parents' use of noncoercive feeding practices during daily feeding interactions with preschool children (3-5-years-old) with an avid eating profile. Parents (N = 109; females n = 85) completed a 10-day EMA period which assessed momentary mood, feeding goals, feeding practices, and contextual factors.</p><p><strong>Results: </strong>Parents were more likely to use structure-based feeding practices when feeding goals were health-related, the atmosphere was positive or neutral, or when parents initiated eating occasions. Parents were also more likely to use autonomy support feeding practices when their feeding goals were health-related or when parents initiated eating occasions. Encouraging children to eat or negotiating with children about how much or what food to eat was significantly associated with a negative atmosphere during eating occasions.</p><p><strong>Conclusions: </strong>Together, our findings show that parental mood, feeding goals and context are momentary predictors of parents' use of noncoercive feeding practices to manage children's avid eating behaviour. Further work is needed to examine whether supporting parents to prioritise health-related goals at mealtimes increases the use of adaptive, noncoercive feeding practices.</p>","PeriodicalId":50336,"journal":{"name":"International Journal of Behavioral Nutrition and Physical Activity","volume":"22 1","pages":"66"},"PeriodicalIF":5.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12121011/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144175635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trajectories of plant-based dietary patterns and their sex-specific associations with cardiometabolic health among young Australian adults.","authors":"Laura E Marchese, Sarah A McNaughton, Gilly A Hendrie, Priscila P Machado, Therese A O'Sullivan, Lawrence J Beilin, Trevor A Mori, Kacie M Dickinson, Katherine M Livingstone","doi":"10.1186/s12966-025-01765-0","DOIUrl":"10.1186/s12966-025-01765-0","url":null,"abstract":"<p><strong>Background: </strong>Plant-based diets are associated with favourable cardiovascular health markers. Although increasingly consumed among younger demographics, it is unclear how plant-based diet quality tracks from adolescence to young adulthood, and how this impacts cardiovascular health later in life. Thus, this study aimed to explore trajectories of plant-based dietary patterns from adolescence to young adulthood and investigate associations with cardiometabolic health markers in young Australian adults.</p><p><strong>Methods: </strong>Longitudinal data from 417 participants from the Raine Study were included. Semi-quantitative food frequency questionnaires conducted at 14, 20, and 27 years of were used to derive three plant-based diet quality index scores: an overall plant-based diet (PDI), a healthy plant-based diet (hPDI), and a less healthy plant-based diet (uPDI). Markers of cardiometabolic health included waist circumference, blood lipids, and blood pressure obtained at 14 and 28 years of age. Group-based trajectory modelling was used to describe plant-based diet quality trajectory groups from adolescence to young adulthood. Multivariate linear regression models were used to investigate associations with cardiovascular health markers.</p><p><strong>Results: </strong>Plant-based diet quality trajectory groups were different by sex, but remained relatively stable over the life stages, with participants remaining either above or below average diet quality at all time points. Associations with cardiovascular health outcomes differed between the sexes, with the hPDI having the greatest number of associations for females, and the uPDI for males. Being female with a higher hPDI score was associated with lower insulin (β = -1.11 (95% CI -2.12, -0.09)), HOMA-IR (β = -0.25 (95% CI -0.48, -0.01)), systolic blood pressure (β = -2.75 (95% CI -5.31, -0.19)), and hs-CRP (β = -1.53 (95% CI -2.82, -0.23)), and higher HDL-cholesterol (β = 0.13 (95% CI -0.03, 0.23)) compared to females with lower hPDI scores. Being male in the higher scoring uPDI group was associated with higher waist circumference (β = 3.12 (95% CI 0.61, 5.63)), waist-to-height ratio (β = 0.02 (95% CI 0.01, 0.03)), insulin (β = 1.54 (95% CI 0.33, 2.76)), HOMA-IR (β = 0.35 (95% CI 0.07, 0.63)), and hypertension status (β = 6.60 (95% CI 1.04, 42.00)) when compared to the lower scoring uPDI group.</p><p><strong>Conclusions: </strong>This study provides new insights into how plant-based diets track across adolescence into adulthood, impacting on cardiometabolic risk factors differently for males and females. Findings highlight the importance of early sex-specific interventions in adolescence to reduce future risk of cardiovascular-disease.</p>","PeriodicalId":50336,"journal":{"name":"International Journal of Behavioral Nutrition and Physical Activity","volume":"22 1","pages":"62"},"PeriodicalIF":5.6,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12117903/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144162428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The impact of narratives and active video games among black and hispanic children with overweight and obesity: a randomized controlled trial.","authors":"Amy S Lu, Tom Baranowski, Tiago V Barreira, Amy Fleischman, Melanie C Green, Shirley Y Huang, I-Min Lee, Lynne L Levitsky, Farzad Noubary, Debbe Thompson","doi":"10.1186/s12966-025-01756-1","DOIUrl":"10.1186/s12966-025-01756-1","url":null,"abstract":"<p><strong>Background: </strong>Overweight and obesity disproportionately affect Black and Hispanic children who also play more video games. Narratives, coupled with home-based active video games (AVGs), may enhance PA and mitigate these disparities. This study tested the effect of narrative-enhanced home-based AVGs among predominantly Black and Hispanic children with overweight and obesity.</p><p><strong>Methods: </strong>This 6-month three-group RCT recruited 135 children aged 7-14 from pediatric clinics in Boston, MA (January 2020 - May 2022) during the COVID-19 pandemic. Participants were randomized into: [Narrative + AVG], receiving an Xbox/Kinect with six AVGs interspersed with a narrative animation Ataraxia (72 episodes over six months), which accompanied the AVGs; [AVG Only], receiving the Xbox/Kinect and AVGs without narrative animation; and [Waitlist Control], receiving the intervention post-RCT. The primary outcome was objectively assessed daily moderate-to-vigorous PA (MVPA). Secondary outcomes included body composition (fat and lean mass, total region fat), BMI%, fasting insulin, glucose, lipid panel (Cholesterol, HDL, LDL, and Triglycerides), and C-reactive protein. Assessments occurred at baseline, 3, and 6 months. It was hypothesized that [Narrative + AVG] would outperform [AVG Only], which would outperform [Waitlist Control].</p><p><strong>Results: </strong>79 children completed all three visits (Age = 10.9 ± 1.7; 63% Boys; 62% Black; 25% Latino; 11% Mixed; and 1% Asian). No statistically significant improvements in MVPA were observed within any condition at 3 or 6 months. A post-hoc exploratory analysis revealed that over the first three months, [Narrative + AVG] increased daily MVPA by 6.8 min compared to [Waitlist Control]. Over the same period, the [AVG Only] group exhibited 815 g less lean mass gain and 7.2 mg/dL lower HDL cholesterol levels relative to the [Waitlist Control].</p><p><strong>Conclusions: </strong>While neither narrative-enhanced AVGs nor AVGs alone consistently increased daily MVPA across the 6-month RCT, participants in the narrative AVGs group demonstrated greater daily MVPA compared to the control group during the initial three months. During this same period, the AVG-only group exhibited reduced lean mass gain and lower HDL cholesterol levels compared to the waitlist control. The added advantage of narratives was inconclusive, likely due to implementation challenges encountered during the pandemic. These findings highlight the need for addressing these challenges in future research in a fully powered study.</p><p><strong>Trial registration: </strong>Active Video Games on Physical Activity (Main Trial), NCT04116515. Registered December 25, 2019, https//clinicaltrials.gov/study/NCT04116515.</p>","PeriodicalId":50336,"journal":{"name":"International Journal of Behavioral Nutrition and Physical Activity","volume":"22 1","pages":"60"},"PeriodicalIF":5.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12107869/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144152580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A cluster randomized factorial trial of school-lunch salad bars and marketing on elementary students' objectively measured fruit and vegetable consumption.","authors":"Marc A Adams, Michael Todd, Mindy L McEntee, Tsung-Yen Yu, Punam Ohri-Vachaspati, Timothy J Richards, Meg Bruening","doi":"10.1186/s12966-025-01758-z","DOIUrl":"10.1186/s12966-025-01758-z","url":null,"abstract":"<p><strong>Background: </strong>Schools in the United States play a crucial role in promoting healthy eating habits. Despite numerous public health efforts, children's consumption of fruits and vegetables (FVs) still fall short of recommended amounts. Advocates have promoted school lunch salad bars as an effective strategy to increase primary students' FV consumption, but rigorous research has lagged behind their efforts. This study evaluated the effectiveness of introducing school lunch salad bars, FV marketing, and the combination of both on elementary students' objectively measured fresh FV selection and consumption.</p><p><strong>Methods: </strong>A cluster-randomized factorial trial was conducted among 13 elementary schools from 12 public school districts participating in the U.S. National School Lunch Program with more than 50% of students eligible for free or reduced lunch. Schools were assigned randomly to one of four conditions: Salad Bar with FV Marketing (n = 4), Salad Bar-only (n = 3), FV Marketing-only (n = 3), and wait-listed control (n = 3). The conditions were assessed at three measurement waves. Students' (N = 3,080) aggregated fresh FV selection and consumption were measured via digital scales (grams) using objective plate waste methodology. Zero-inflated negative binomial models were used to examine differences in consumption (accounting for excess zeros and overdispersion) by condition and wave.</p><p><strong>Results: </strong>No significant differences were observed for students selecting FVs across any condition. In contrast, after ten weeks of exposure, stand-alone school lunch salad bars significantly increased students' consumption of FV (IRR = 1.84, 95% CI 1.12, 3.04) compared to the wait-listed control. Findings for FV marketing alone suggested increased consumption (IRR = 1.60, 95% CI 0.97, 2.64) relative to control, but were non-significant and inconclusive. Salad bars in combination with FV marketing showed the strongest effect on FV consumption relative to the wait-list control, with a significant increase observed at ten weeks (IRR = 2.07, 95% CI 1.29, 3.31).</p><p><strong>Conclusions: </strong>Stand-alone salad bars are effective at increasing elementary students' FV consumption after a minimum of ten weeks. The combined intervention of salad bars and FV marketing demonstrated the greatest improvement in FV consumption. These findings support the promotion of salad bars in schools as a strategy to increase FV consumption among students.</p><p><strong>Trial registration: </strong>ClinicalTrials.gov Identifier: NCT03283033 (preregistered on: 9/14/2017).</p>","PeriodicalId":50336,"journal":{"name":"International Journal of Behavioral Nutrition and Physical Activity","volume":"22 1","pages":"58"},"PeriodicalIF":5.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12105326/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144152308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accelerometer measurement error in a randomized physical activity intervention trial in breast cancer survivors was nondifferential but attenuated the intervention effect.","authors":"Laura Q Rogers, Douglas Midthune, Kevin Dodd, Heather Bowles, Edward McAuley, Kerry S Courneya, Brian Barrett, Spiro Razis, Gary R Hunter, Stephen J Carter, Raymond J Carroll, Victor Kipnis","doi":"10.1186/s12966-025-01760-5","DOIUrl":"10.1186/s12966-025-01760-5","url":null,"abstract":"<p><strong>Background: </strong>Physical activity reduces morbidity and mortality risk in cancer survivors, but a meaningful proportion of this vulnerable population are physically inactive. Targeted interventions can help cancer survivors adopt a more active lifestyle, but the efficacy of these interventions must be rigorously evaluated in randomized controlled intervention trials. A major barrier to such trials involves the difficulty in obtaining unbiased estimates of physical activity in free-living conditions.</p><p><strong>Methods: </strong>We conducted a randomized controlled trial of a 3-month intervention designed to increase physical activity vs. usual care in breast cancer survivors (n = 316). The primary outcome was change in physical activity as estimated by hip-worn accelerometer (MTI/Actigraph, models GT1M and GT3X). The trial included a sub-study (n = 106) wherein unbiased measures of total energy expenditure (doubly labeled water), and resting energy expenditure (indirect calorimetry) were collected. A linear mixed measurement error model characterized the structure of measurement error in accelerometry-estimated physical activity energy expenditure (PAEE), and corrected for bias in the estimated intervention effect due to measurement error.</p><p><strong>Results: </strong>Bias in the accelerometer estimates was related to true PAEE (p < 0.001) and baseline body mass index (p < 0.001) but was not related to age (p = 0.13). After correcting for measurement error, the estimated intervention effect at 3 months (change from baseline in PAEE in the intervention arm minus change in the control arm) was 77 kcal/day (95% confidence interval (CI) = 31-125), compared to 48 kcal/day (95% CI = 22-75) when measurement error was ignored. These results indicate a 20% (21%) increase in PAEE kcal x d^-1 (kcal x kg^-1 × d^-1) at month 3 relative to baseline for the corrected model vs. 14% (15%) for the uncorrected model. There was no evidence that measurement error in accelerometry-estimated PAEE was differential (differed by treatment arm) in the trial (p = 0.86).</p><p><strong>Conclusions: </strong>Measurement error in accelerometer-estimated PAEE can attenuate the effect size related to intervention effects in randomized controlled trials of physical activity interventions. Sub-studies that collect unbiased measures of PAEE can be used to correct for this short-coming.</p><p><strong>Trial registration: </strong>ClinicalTrials.gov; NCT00929617; registered 06/26/2009; https://clinicaltrials.gov/study/NCT00929617.</p>","PeriodicalId":50336,"journal":{"name":"International Journal of Behavioral Nutrition and Physical Activity","volume":"22 1","pages":"59"},"PeriodicalIF":5.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12105316/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144152431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Typology of out-of-home eaters: a description of sociodemographic, lifestyle, nutritional and environmental characteristics in the NutriNet-Santé cohort.","authors":"Emma Meyer, Benjamin Allès, Justine Berlivet, Sandrine Péneau, Alice Bellicha, Mathilde Touvier, Brigitte Langevin, Philippe Pointereau, Denis Lairon, Serge Hercberg, Emmanuelle Kesse-Guyot, Julia Baudry","doi":"10.1186/s12966-025-01752-5","DOIUrl":"10.1186/s12966-025-01752-5","url":null,"abstract":"<p><strong>Background: </strong>The out-of-home (OOH) food sector holds the potential to promote healthier and more sustainable diets on a large scale given the high number of people eating OOH regularly. However, information about socioeconomic and dietary characteristics of OOH eaters is limited. This study aimed to identify a typology of OOH consumers by frequency and type of meal consumed OOH and their associated sociodemographic, lifestyle, nutritional, and environmental characteristics.</p><p><strong>Methods: </strong>Based on a sub-sample of adults of the French NutriNet-Santé cohort who completed a food frequency questionnaire and a questionnaire on OOH consumption habits in 2014 (n = 29,140, mean age: 53.6 (SD = 14.0) years, 74.3% women), we conducted a Multiple Factor Analysis followed by a clustering procedure. AN(C)OVA models were then used to examine the associations between the identified clusters and socio-demographic, lifestyle, and diet-related characteristics (using dietary scores and environmental indicators including greenhouse gas emissions, land use and energy consumption).</p><p><strong>Results: </strong>We identified five clusters based on their OOH consumption patterns: Weekday-only eaters (19%), Frequent weekday and weekend eaters (24%), Organic eaters (6%), Weekend and evening eaters (19%), and Home-only eaters (32%). Weekday-only eaters were younger, more likely to be professionally active and to have children at home than the other groups. Frequent weekday and weekend eaters, with the highest OOH consumption, had the lowest dietary quality and the highest diet-related environmental impacts and consisted mostly of younger women with higher socioeconomic status. Organic eaters, often living in urban areas and following specific diets such as vegan or vegetarian ones, had the best dietary quality and the lowest diet-related environmental impacts. Weekend and evening eaters and Home-only eaters had a higher proportion of retired individuals, with Weekend and evening eaters also showing a greater proportion of high-income individuals.</p><p><strong>Conclusions: </strong>Our findings indicate a lower dietary quality and higher dietary environmental impacts among frequent OOH eaters, whereas those with higher organic consumption showed opposite trends. This study contributes to the understanding of different OOH consumer characteristics and could provide a basis for further research in the field.</p><p><strong>Trial registration: </strong>The study was registered at ClinicalTrials.gov (NCT03335644).</p>","PeriodicalId":50336,"journal":{"name":"International Journal of Behavioral Nutrition and Physical Activity","volume":"22 1","pages":"61"},"PeriodicalIF":5.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12107787/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144152584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of physical activity on changes in weight and aerobic capacity during an 18-month behavioral weight loss intervention.","authors":"Seth A Creasy, Danielle M Ostendorf, Laura Kaizer, Rebecca Rosenberg, Matthew J Breit, Daniel H Bessesen, Edward L Melanson, Victoria A Catenacci","doi":"10.1186/s12966-025-01754-3","DOIUrl":"10.1186/s12966-025-01754-3","url":null,"abstract":"<p><strong>Background: </strong>The objective of this secondary analysis was to examine the effect of MVPA and the time of day that MVPA (i.e., morning vs. evening) is performed on long-term changes in body weight and aerobic capacity.</p><p><strong>Methods: </strong>Adults with overweight and obesity (n = 105) enrolled in an 18-month behavioral weight loss intervention involving a reduced calorie diet and a supervised exercise program. Participants were encouraged to increase their bouted MVPA (i.e., MVPA accumulated in bouts ≥ 10 min) to 300 min/wk. Body weight, body composition, aerobic capacity, and physical activity were assessed at 0, 6, 12, and 18 months. Participants were categorized based on whether they increased bouted MVPA by ≥ 150 min/wk during the supervised exercise program. Linear regression was used to examine the effect of increasing bouted MVPA on weight loss and aerobic capacity. Similar methods were used to examine the effect of time of day of MVPA on weight loss and aerobic capacity.</p><p><strong>Results: </strong>Participants who increased bouted MVPA by ≥ 150 min/wk during the supervised exercise program had greater weight loss, fat loss, and increases in aerobic capacity at 18 months compared to participants who increased bouted MVPA by < 150 min/wk. Amongst participants who increased bouted MVPA by ≥ 150 min/wk, the time of day of MVPA had no significant effect on weight loss or aerobic capacity.</p><p><strong>Conclusions: </strong>Increasing bouted MVPA by ≥ 150 min/wk improves weight loss and aerobic capacity during a behavioral weight loss intervention which includes caloric restriction. MVPA earlier and later in the day is beneficial for weight management and cardiorespiratory fitness.</p><p><strong>Trial registration: </strong>Clinicaltrials.gov (NCT01985568) on October 24, 2013.</p>","PeriodicalId":50336,"journal":{"name":"International Journal of Behavioral Nutrition and Physical Activity","volume":"22 1","pages":"57"},"PeriodicalIF":5.6,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12093688/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144121280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}