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1.
J Adolesc ; 91: 59-70, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-34333320

RESUMO

INTRODUCTION: The present study examined the relationships between bullying victimization experiences, body esteem (BE), and body dissatisfaction (BD) by obesity status. METHODS: Using a cross-sectional design, adolescents (10-16y) from the U.S. completed surveys. Weight and height were objectively assessed. Bullying was assessed using the Personal Experiences Checklist, with a total score that included three subscales (cyber, verbal-relational, and physical). BE was assessed using total score on the BE Scale, and BD was assessed using the Body Image Assessment for Pre-Adolescents, operationalized as the discrepancy between current and ideal body figure. Linear regression models, controlling for sociodemographics, were used to examine obesity status (with vs. without obesity) and sex as moderators of the relationships between bullying, BE, and BD. RESULTS: On average, adolescents (n = 328) were 12.6 ± 1.9 y, 45.4% male, 58.2% White, 35.7% Black, and 36.0% had obesity. Obesity status moderated the relationship between bullying experiences and BE, such that these relationships were only significant (B = -0.38, p<.05) among adolescents with obesity compared to adolescents without obesity. In both groups, greater verbal-relational bullying experiences were associated with lower BE, while greater physical bullying experiences were related to higher BE only among adolescents with obesity. In adolescent girls without obesity, greater cyberbullying experiences were associated with lower BD. CONCLUSIONS: The findings suggest different associations between sub-types of bullying victimization experiences and BE and BD, highlighting the importance of examining these associations separately by obesity status.


Assuntos
Insatisfação Corporal , Bullying , Vítimas de Crime , Cyberbullying , Adolescente , Estudos Transversais , Feminino , Humanos , Masculino
2.
Int J Eat Disord ; 52(11): 1291-1300, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31350934

RESUMO

OBJECTIVE: To evaluate the efficacy of the Female Athlete Body project (FAB) in reducing eating disorder (ED) symptoms and risk factors. METHOD: This study was a community participatory three-site, two-arm, cluster randomized controlled trial (RCT). Female collegiate athletes (N = 481) were randomly assigned by team to the FAB intervention, a behavioral ED risk factor reduction program, or a waitlist control condition. Primary analyses examined 18-month effects for ED pathology. Secondary analyses examined risk factors and correlates (e.g., thin-ideal internalization, negative mood, Female Athlete Triad knowledge, and body mass index [BMI]). RESULTS: Linear mixed effects models with team as a cluster level variable and study condition as a between-subjects variable revealed significantly reduced dietary restraint in FAB teams relative to control teams. FAB teams also reported significantly fewer objective and subjective binge episodes than control teams. Finally, FAB teams showed significantly lower thin-ideal internalization and increased BMI at 18-months. No other significant differences were found. DISCUSSION: This RCT examined the effects of a short intervention on ED pathology and risk factors in female collegiate athletes through 18-month follow-up. This trial is one of only three trials with female athletes that have shown long-term reductions in any ED symptoms or produced positive effects on ED risk factors. The present study is the first to find such effects with athletes using a brief (i.e., 4 hr) intervention at 18-month follow-up. Although small effects were found, the current trial provides valuable lessons about future design and implementation of similar trials with athletes. TRIAL REGISTRATION: Clinical trials NCT01735994.


Assuntos
Transtornos da Alimentação e da Ingestão de Alimentos/diagnóstico , Adolescente , Adulto , Atletas , Feminino , Humanos , Fatores de Risco , Fatores de Tempo , Resultado do Tratamento , Adulto Jovem
3.
Appetite ; 143: 104397, 2019 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-31398376

RESUMO

Calorie restriction (CR) enhances longevity in humans who are normal weight, overweight and obese. While dietary regimens can change self-efficacy, eating behaviors, and food cravings in individuals with obesity, the responses of these measures to prolonged CR in individuals who are exclusively not obese is unknown. The aim of this analysis was to test the effects of a two-year CR intervention on self-efficacy and eating attitudes and behaviors in humans without obesity by analyzing data from the Comprehensive Assessment of Long-term Effects of Reducing Intake of Energy Phase 2 (CALERIE 2) study. Participants (n = 218, BMI range = 21.3-29.0 kg/m2) were randomized to a 25% CR group or an ad libitum (AL) group. Eating attitudes and behaviors and self-efficacy were assessed using validated questionnaires at baseline, month 12, and month 24. Dietary restraint and self-efficacy increased in the CR compared to the AL group (ES ≥ 0.32). Increased self-efficacy was negatively related to weight change (ρ < -0.24). In the CR group, males showed a reduction in cravings for carbohydrates and fats at month 24, whereas females did not. The CR group showed elevations in state hunger, which were transient, and disinhibited eating (ES ≥ 0.37). In individuals without obesity, dietary restraint and self-efficacy could be important in promoting long-term CR for individuals looking to use CR as a tool to improve longevity.


Assuntos
Restrição Calórica/psicologia , Fissura , Comportamento Alimentar/fisiologia , Comportamento Alimentar/psicologia , Autoeficácia , Adulto , Índice de Massa Corporal , Restrição Calórica/métodos , Feminino , Humanos , Peso Corporal Ideal , Longevidade , Masculino , Tempo , Fatores de Tempo
4.
Angew Chem Int Ed Engl ; 58(9): 2834-2838, 2019 Feb 25.
Artigo em Inglês | MEDLINE | ID: mdl-30694597

RESUMO

Ambiphilic molecules, which contain a Lewis base and Lewis acid, are of great interest based on their unique ability to activate small molecules. Phosphine boronates are one class of these substrates that have interesting catalytic activity. Direct access to these phosphine boronates is described through the iridium-catalyzed C-H borylation of phosphines. An unconventional cationic iridium catalyst was identified as optimal for a range of phosphines, providing good yields and selectivity across a diverse class of phosphine boronates (isolated as the borane-protected phosphine). A complimentary catalyst system (quinoline-based silane ligand with [(COD)IrOMe]2 ) was optimal for biphenyl-based phosphines. Selective polyborylation was also shown providing bis- and tris-borylated phosphines. Deprotection of the phosphine boronate provided free ambiphilic phosphine boronates, which do not have detectable interactions between the phosphorus and boron atoms in solution or the solid state.

5.
Environ Sci Technol ; 52(7): 4061-4071, 2018 04 03.
Artigo em Inglês | MEDLINE | ID: mdl-29510022

RESUMO

Aqueous methylglyoxal chemistry has often been implicated as an important source of oligomers in atmospheric aerosol. Here we report on chemical analysis of brown carbon aerosol particles collected from cloud cycling/photolysis chamber experiments, where gaseous methylglyoxal and methylamine interacted with glycine, ammonium, or methylammonium sulfate seed particles. Eighteen N-containing oligomers were identified in the particulate phase by liquid chromatography/diode array detection/electrospray ionization high-resolution quadrupole time-of-flight mass spectrometry. Chemical formulas were determined and, for 6 major oligomer products, MS2 fragmentation spectra were used to propose tentative structures and mechanisms. Electronic absorption spectra were calculated for six tentative product structures by an ab initio second order algebraic-diagrammatic-construction/density functional theory approach. For five structures, matching calculated and measured absorption spectra suggest that they are dominant light-absorbing species at their chromatographic retention times. Detected oligomers incorporated methylglyoxal and amines, as expected, but also pyruvic acid, hydroxyacetone, and significant quantities of acetaldehyde. The finding that ∼80% (by mass) of detected oligomers contained acetaldehyde, a methylglyoxal photolysis product, suggests that daytime methylglyoxal oligomer formation is dominated by radical addition mechanisms involving CH3CO*. These mechanisms are evidently responsible for enhanced browning observed during photolytic cloud events.


Assuntos
Nitrogênio , Aldeído Pirúvico , Aerossóis , Cromatografia Gasosa-Espectrometria de Massas , Fotólise
6.
Int J Eat Disord ; 51(9): 1080-1089, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-30312490

RESUMO

OBJECTIVE: Several studies indicate that eating-disorder (ED) psychopathology is elevated in athletes compared to non-athletes. The assessment of excessive exercise among athletes is a challenge because, compared to non-athletes, athletes are required to train at higher intensities and for longer periods of time. However, individuals participating in competitive sports are still susceptible to unhealthy physical-activity patterns. Most ED assessments were developed and normed in non-athlete samples and, therefore, do not capture the nuances of athletes' training experiences. The purpose of the current study was to develop and validate a clinically useful, self-report measure of unhealthy training behaviors and beliefs in athletes, the Athletes' Relationships with Training Scale (ART). METHOD: The initial item pool was administered to N = 267 women collegiate athletes who were participating in an ED prevention program study and N = 65 women athletes who were in ED treatment. RESULTS: Factor analyses indicated the ART had a four-factor structure. Factorial and construct validity of the ART were demonstrated. ART scores significantly predicted health care utilization and differed between athletes with an ED versus athletes without an ED. For athletes in ED treatment, ART scores significantly decreased from treatment admission to discharge. DISCUSSION: The ART showed evidence of strong psychometric properties and clinical utility. The ART could be helpful for clinicians and athletic trainers to help gauge whether athletes are engaging in unhealthy training practices that may warrant clinical attention and for tracking clinical outcomes in athletes with EDs who are receiving treatment.


Assuntos
Transtornos da Alimentação e da Ingestão de Alimentos/complicações , Adulto , Atletas , Transtornos da Alimentação e da Ingestão de Alimentos/patologia , Feminino , Humanos , Masculino , Autorrelato , Adulto Jovem
7.
J Child Psychol Psychiatry ; 57(11): 1277-1286, 2016 11.
Artigo em Inglês | MEDLINE | ID: mdl-27418025

RESUMO

BACKGROUND: Studies have identified perturbations in facial processing in bipolar disorder and major depressive disorder (MDD), but their relationship to genetic risk and early development of illness is unclear. METHODS: The Scottish Bipolar Family Study is a prospective longitudinal investigation examining young individuals (age 16-25) at familial risk of mood disorder. Participants underwent functional MRI using an implicit facial processing task employing angry and neutral faces. An explicit facial expression recognition task was completed outside the scanner. Clinical outcomes obtained 2 years after the scan were used to categorise participants into controls (n = 54), high-risk individuals who had developed MDD (HR MDD; n = 30) and high-risk individuals who remained well (HR Well, n = 43). RESULTS: All groups demonstrated activation patterns typically observed during facial processing, including activation of the amygdala, hippocampus, fusiform gyrus and middle frontal regions. Notably, the HR MDD group showed reduced activation of the anterior cingulate gyrus versus both the control and HR Well group for angry faces, and versus the HR Well group for neutral faces. Outside the scanner, the HR MDD group was less accurate in recognising fearful expressions than the HR Well group. CONCLUSIONS: Here, we demonstrate functional abnormalities of the anterior cingulate cortex alongside facial emotional recognition deficits in high-risk individuals in the early stages of depression compared with both controls and at-risk individuals who remained well. These neural changes were associated with a current or future diagnosis of MDD and were not simply associated with increased familial risk.


Assuntos
Transtorno Depressivo Maior/fisiopatologia , Expressão Facial , Giro do Cíngulo/fisiopatologia , Adolescente , Adulto , Feminino , Seguimentos , Predisposição Genética para Doença , Humanos , Masculino , Prognóstico , Risco , Escócia , Adulto Jovem
8.
Appetite ; 100: 142-51, 2016 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-26879222

RESUMO

OBJECTIVE: Mindfulness is theorized to affect the eating behavior and weight of pregnant women, yet no measure has been validated during pregnancy. METHODS: This study qualitatively and quantitatively evaluated the reliability and validity of the Mindful Eating Questionnaire (MEQ) in overweight and obese pregnant women. Participants completed focus groups and cognitive interviews. The MEQ was administered twice to measure test-retest reliability. The Eating Inventory (EI) and Mindful Attention Awareness Scale (MAAS) were administered to assess convergent validity, and the Neighborhood Environment Walkability Scale (NEWS) assessed discriminant validity. RESULTS: Participants were 20 ± 8 weeks gestation (mean ± SD), 30 ± 2 years old, and 55% were obese. The MEQ total score had good test-retest reliability (r = .85). The total score internal consistency reliability was poor (Cronbach's α = .56). The external cues subscale (ECS) was not internally consistent (α = .31). Other subscales ranged from α = .59-.68. When the ECS was excluded, the MEQ total score internal consistency was acceptable (α = .62). Convergent validity was supported by the MEQ total score (with and without ECS) correlating significantly with the MAAS and the EI disinhibition and hunger subscales. Discriminant validity of the MEQ was supported by the MEQ and NEWS total scores and subscales not being significantly correlated. The quantitative results were supported by the qualitative context and content analysis. CONCLUSION: With the exception of the ECS, the MEQ's reliability and validity was supported in pregnant women, and most of the subscales were more robust in pregnant women than in the original sample of healthy adults. The MEQ's use with overweight and obese pregnant women is supported.


Assuntos
Dieta Saudável , Fenômenos Fisiológicos da Nutrição Materna , Atenção Plena , Obesidade/epidemiologia , Sobrepeso/epidemiologia , Cooperação do Paciente , Complicações na Gravidez/epidemiologia , Adulto , Índice de Massa Corporal , Comportamento Alimentar , Feminino , Humanos , Internet , Louisiana/epidemiologia , Programas de Rastreamento/métodos , Comportamento Materno , Avaliação Nutricional , Gravidez , Pesquisa Qualitativa , Reprodutibilidade dos Testes
9.
Telemed J E Health ; 20(9): 835-49, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24978152

RESUMO

OBJECTIVE: The rapid growth and evolution of health-related technology capabilities are driving an established presence in the marketplace and are opening up tremendous potential to minimize and/or mitigate barriers associated with achieving optimal health, performance, and readiness. This article summarizes technology-based strategies that promote healthy habits related to physical activity, nutrition, and sleep. MATERIALS AND METHODS: The Telemedicine and Advanced Technology Research Center convened a workshop titled "Leveraging Technology: Creating & Sustaining Changes for Health" (May 29-30, 2013, Fort Detrick, MD). Participants included experts from academia (n=3), government (n=33), and industry (n=16). A modified Delphi method was used to establish expert consensus in six topic areas: (1) physical activity, (2) nutrition, (3) sleep, (4) incentives for behavior change, (5) usability/interoperability, and (6) mobile health/open platform. RESULTS: Overall, 162 technology features, constructs, and best practices were reviewed and prioritized for physical activity monitors (n=29), nutrition monitors (n=35), sleep monitors (n=24), incentives for change (n=36), usability and interoperability (n=25), and open data (n=13). CONCLUSIONS: Leading practices, gaps, and research needs for technology-based strategies were identified and prioritized. This information can be used to provide a research and development road map for (1) leveraging technology to minimize barriers to enhancing health and (2) facilitating evidence-based techniques to create and sustain healthy behaviors.


Assuntos
Comportamentos Relacionados com a Saúde , Monitorização Fisiológica/tendências , Telemedicina/tendências , Técnica Delphi , Difusão de Inovações , Promoção da Saúde , Humanos , Motivação
10.
Pediatr Clin North Am ; 70(4): 745-760, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37422312

RESUMO

Low health literacy has been linked to worse child health-related knowledge, behaviors, and outcomes across multiple health domains. As low health literacy is highly prevalent and an important mediator of income- and race/ethnicity-associated disparities, provider adoption of health literacy best practices advances health equity. A multidisciplinary effort involving all providers engaged in communication with families should include a universal precautions approach, with clear communication strategies employed with all patients, and advocacy for health system change.


Assuntos
Equidade em Saúde , Letramento em Saúde , Criança , Humanos , Etnicidade , Comunicação
11.
Artigo em Inglês | MEDLINE | ID: mdl-38131695

RESUMO

Emerging research suggests that body dissatisfaction (BD) is prevalent among midlife and older women (i.e., upwards of 70%). Cross-sectionally, BD is associated with myriad poor health and wellness outcomes (e.g., depression, disordered eating, bad nutrition) in midlife/older women. However, relatively few studies have examined the longitudinal relations between BD and health outcomes in this population. This preliminary study investigated the longitudinal associations of BD with wellbeing and health-related quality of life (QOL) among midlife/older adult women over one year. Participants (n = 86, women aged 40-72 years, M = 51.49, SD = 7.34, 86% white) completed self-report measures of BD, psychosocial impairment, health behaviors, and QOL at baseline (T1) and 12-month follow-up (T2). A series of multiple linear regression models included T1 BD as the predictor variable of health outcomes at T2, covarying for T1 BMI and age in all models. BD was associated with greater negative emotions and psychosocial impairment, less physical activity enjoyment, and poorer physical, psychological, and social QOL one year later. Findings suggest that BD is associated with negative consequences for women across the lifespan (ƒ2 ranges = 0.06-0.60). Future research investigating BD as a unique, modifiable risk factor for health outcomes among diverse samples of midlife/older women is warranted. Targeting BD in interventions may improve health indices beyond eating disorders for this population.


Assuntos
Insatisfação Corporal , Qualidade de Vida , Humanos , Feminino , Idoso , Qualidade de Vida/psicologia , Imagem Corporal/psicologia , Inquéritos e Questionários , Comportamentos Relacionados com a Saúde
12.
Artigo em Inglês | MEDLINE | ID: mdl-35010751

RESUMO

The origins of theories specifying dietary restraint as a cause of eating disorders can be traced to the 1970s. This paper will present an overview of the origins of dietary restraint theories and a brief historical review of evidence will be summarized. Recent research will be presented, including the results from the CALERIE Phase 1 study, as well as CALERIE Phase 2, which were NIH-sponsored randomized controlled trials. CALERIE 2 provided a test of the effect of two years of caloric restriction (CR) on the development of eating disorder syndromes and symptoms in comparison to a control group that did not alter eating behavior or body weight. The intervention was effective for inducing a chronic (two-year) reduction in total energy expenditure and increased dietary restraint but did not increase symptoms of eating disorders. The results of this recent investigation and other studies have not provided experimental support for conventional dietary restraint theories of eating disorders. These findings are discussed in terms of potential revisions of dietary restraint theory, as well as the implications for a paradigm shift in public health messaging related to dieting.


Assuntos
Restrição Calórica , Transtornos da Alimentação e da Ingestão de Alimentos , Dieta , Comportamento Alimentar , Transtornos da Alimentação e da Ingestão de Alimentos/epidemiologia , Humanos , Saúde Pública
13.
Front Oncol ; 12: 933619, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35992862

RESUMO

Many patients with chronic lymphocytic leukemia (CLL) experience physical dysfunction and low overall fitness. It remains unknown what factors drive CLL physical dysfunction. We assessed physical function and metabolic lipoprotein panels in 106 patients with CLL. In univariate analyses of clinical factors, a longer time since diagnosis was associated with a higher likelihood of dysfunctional aerobic fitness (OR = 3.56, 95% CI: 1.37-9.22; p = 0.002) and physical performance (SPPB: OR = 2.03, 95% CI: 1.20-3.44; p = 0.004). Having received treatment was associated with a higher likelihood of dysfunctional aerobic fitness (OR = 1.57, 95% CI: 1.02-2.40; p = 0.036), SPPB (OR = 1.85, 95% CI: 1.13-3.03; p = 0.011) and grip strength (OR = 1.67, 95% CI: 1.10-2.55; p = 0.015). We found that several small HDL particle parameters, higher levels of citrate (OR = 2.01, 95% CI: 1.22-3.31; p = 0.030), and lower levels of hemoglobin (OR = 0.50, 95% CI: 0.31-0.82; p = 0.030) were associated with a higher likelihood of dysfunctional aerobic fitness. Multivariable least absolute shrinkage and selection operator (LASSO)-penalized regression analyses using variable importance measures (VIM) showed that 7.8-nm HDL particles (VIM = 1.000) and total HDL particle levels (VIM = 1.000) were more informative than clinical measures for the odds of dysfunctional aerobic fitness and 6-min walk functional fitness, respectively, while 10.3-nm HDL particles (VIM = 0.383) were more informative for grip strength. Time since diagnosis (VIM = 0.680) and having received treatment (VIM = 0.490) were more informative than lipoprotein measures for the odds of having dysfunctional SPPB. Taken together, we establish significant relationships between clinical and metabolic factors and physical characteristics that might prompt early use of ancillary support services.

14.
J Eat Disord ; 9(1): 59, 2021 May 05.
Artigo em Inglês | MEDLINE | ID: mdl-33952348

RESUMO

BACKGROUND: Although the link between body dissatisfaction and eating disorder (ED) pathology is well-established in general female samples, less is known about contextual body image (CBI) among female athletes. CBI refers to female athletes' body image concerns in two contexts: sport and daily life. The Contextual Body Image Questionnaire for Athletes (CBIQA) measures four dimensions of body image (Appearance, Thin-Fat Self-Evaluation, Thin-Fat Others' Evaluation, and Muscularity) in both contexts. In a sample of female collegiate athletes, this study sought to A) investigate the psychometric properties of the CBIQA, B) examine the cross-sectional relation of CBI with ED pathology and negative affect, and C) assess the degree to which CBI prospectively predicts ED pathology and negative affect. METHOD: Using self-report data collected from a multi-site parent trial, we examined the psychometric properties of the CBIQA by confirmatory factor analysis. We assessed construct and criterion validity via cross-sectional bivariate correlation analyses with thin-ideal internalization, negative affect, and ED pathology. Using data from Time 1 and 6 months later (Time 2), we investigated the degree to which CBI prospectively predicted ED pathology and negative affect. RESULTS: Results from the CFA largely confirmed de Bruin et al.'s (2011) original factor analysis. Two CBIQA dimensions (Thin-Fat Self and Appearance) in both contexts correlated with ED pathology and negative affect. Thin-Fat Others also correlated with ED pathology in both contexts and negative affect in the sport context. The Muscularity dimension was predominantly orthogonal with other measures. CBIQA dimensions were uncorrelated with thin-ideal internalization. When controlling for BMI and Time 1 scores, daily life and sport appearance concerns predicted ED pathology, whereas perceived evaluation of thin-fat by others in the sport context predicted negative affect 6 months later. CONCLUSIONS: Results support the psychometric validity of the CBIQA and suggest that it captures variance discrete from thin-ideal internalization. The Muscularity dimension largely was not related to other outcomes. Further, specific elements of perceived self- and other-evaluation in both contexts is relevant to risk for ED pathology and negative affect. Future research could examine the impact of dual body image between sports seasons and after transitioning out of sport. CLINICAL TRIALS REGISTRATION: NCT01735994 .


Female athletes evaluate their bodies in two separate contexts, based on their identities in their sport and daily life: this is called contextual body image (CBI). The Contextual Body Image Questionnaire for Athletes (CBIQA) measures four specific elements of CBI among athletes. This study found that the CBIQA measures its intended four elements of CBI, and that it measures an aspect of body image that is different from traditional thin-ideal internalization. Except for evaluation of Muscularity, the elements of CBI were also related to eating disorder measures. Lastly, taking into account earlier scores on the two outcomes (eating disorder behaviors and negative mood), appearance concerns in both daily life and sport predicted eating disorder symptoms 6 months later. Only perceived evaluation of being fat in sport predicted negative mood 6 months later. Our findings suggest that the CBIQA is measuring body image elements that are unique from other types of body image measures, but are still related to eating disorder symptoms, among female competitive athletes. More research is needed to better understand how athletes are affected by body image concerns in both contexts of their identity.

15.
Eat Behav ; 43: 101570, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34655863

RESUMO

The physiological and metabolic effects of experimental overfeeding have been extensively studied, yet only few studies have assessed overfeeding effects on eating behaviors and psychological constructs. We analyzed two 8-week overfeeding studies, the PROOF Study (N = 25; 16 males; 16 African American; 24.1 years; 25.1 kg/m2, inpatient) and the EAT Study (N = 35; 29 males; 20 White; 26.7 years; 25.5 kg/m2, free-living). In both studies, participants were overfed 40% above baseline (daily) energy requirements for eight weeks, consuming all meals under direct supervision. We assessed eating attitudes and behaviors, eating disorder symptoms, and body image via validated questionnaires and visual analog scales at baseline, week (W) 4, and W8, and at two (PROOF: W16-Post, W24-Post) and three (EAT: W12-Post, W20-Post, W32-Post) follow-up visits, respectively. Hunger, desire to eat, and food cravings (carbohydrates, total cravings) decreased during overfeeding in both studies (all Cohen's d effect sizes ≥0.3, all p ≤ .048). Depressive symptoms and fear of fatness increased in both studies (all Cohen's d ≥ 0.4, p ≤ .020), though they were still within normal limits (t-scores ~43-49). Body dissatisfaction increased in both studies during overfeeding (all Cohen's d ≥ 0.4, all p ≤ .044) and remained increased during follow-up (PROOF: W16-Post, Cohen's d = 0.9, p = .004; EAT: W12-Post and W20-Post, all Cohen's d ≥ 0.4, all p ≤ .037). Overfeeding was associated with some deleterious effects, though most returned to baseline during follow-up. However, increases in body dissatisfaction remained up to three months post-overfeeding, highlighting the need to address body image disturbance among people who experience weight gain, even if much of the gained weight is subsequently lost. TRIAL REGISTRATION: The PROOF Study (ClinicalTrials.gov Identifier NCT00565149); the EAT Study (ClinicalTrials.gov Identifier NCT01672632).


Assuntos
Imagem Corporal , Transtornos da Alimentação e da Ingestão de Alimentos , Adulto , Atitude , Comportamento Alimentar , Feminino , Humanos , Masculino , Aumento de Peso
16.
Nutr Rev ; 79(1): 98-113, 2021 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-32940695

RESUMO

Caloric restriction (CR) is a strategy that attenuates aging in multiple nonhuman species. The Comprehensive Assessment of Long-term Effects of Reducing Intake of Energy (CALERIE) trials are part of a research program aiming to test the effects of CR on aging and longevity biomarkers in humans. Building on CALERIE phase 1, CALERIE phase 2 (CALERIE 2) was the largest study to date to assess sustained CR in healthy humans without obesity. In a 24-month randomized controlled trial comprising 218 participants at baseline, CALERIE 2 showed that moderate CR, 11.9% on average, induced improvements in aging-related biomarkers without adversely affecting psychological or behavioral outcomes. The objectives of this report are to summarize and review the highlights of CALERIE 2 and report previously unpublished results on eating disorder symptoms and cognitive function. This article specifically summarizes the physiological, psychological, aging, behavioral, and safety results of the trial. Also provided are research directions beyond CALERIE 2 that highlight important opportunities to investigate the role of CR in aging, longevity, and health span in humans.


Assuntos
Envelhecimento , Biomarcadores/análise , Restrição Calórica , Ingestão de Energia , Adulto , Metabolismo Energético , Feminino , Humanos , Inflamação , Longevidade , Masculino , Pessoa de Meia-Idade , Estado Nutricional , Obesidade , Estresse Oxidativo , Adulto Jovem
17.
Cells ; 10(5)2021 05 11.
Artigo em Inglês | MEDLINE | ID: mdl-34064804

RESUMO

Chronic lymphocytic leukemia (CLL) is associated with physical dysfunction and low overall fitness that predicts poor survival following the commencement of treatment. However, it remains unknown whether higher fitness provides antioncogenic effects. We identified ten fit (CLL-FIT) and ten less fit (CLL-UNFIT) treatment-naïve CLL patients from 144 patients who completed a set of physical fitness and performance tests. Patient plasma was used to determine its effects on an in vitro 5-day growth/viability of three B-cell cell lines (OSU-CLL, Daudi, and Farage). Plasma exosomal miRNA profiles, circulating lipids, lipoproteins, inflammation levels, and immune cell phenotypes were also assessed. CLL-FIT was associated with fewer viable OSU-CLL cells at Day 1 (p = 0.003), Day 4 (p = 0.001), and Day 5 (p = 0.009). No differences between the groups were observed for Daudi and Farage cells. Of 455 distinct exosomal miRNAs identified, 32 miRNAs were significantly different between the groups. Of these, 14 miRNAs had ≤-1 or ≥1 log2 fold differences. CLL-FIT patients had five exosomal miRNAs with lower expression and nine miRNAs with higher expression. CLL-FIT patients had higher HDL cholesterol, lower inflammation, and lower levels of triglyceride components (all p < 0.05). CLL-FIT patients had lower frequencies of low-differentiated NKG2+/CD158a/bneg (p = 0.015 and p = 0.014) and higher frequencies of NKG2Aneg/CD158b+ mature NK cells (p = 0.047). The absolute number of lymphocytes, including CD19+/CD5+ CLL-cells, was similar between the groups (p = 0.359). Higher physical fitness in CLL patients is associated with altered CLL-like cell line growth in vitro and with altered circulating and cellular factors indicative of better immune functions and tumor control.


Assuntos
Sobrevivência Celular , Inflamação , Leucemia Linfocítica Crônica de Células B/fisiopatologia , MicroRNAs/metabolismo , Fenótipo , Idoso , Idoso de 80 Anos ou mais , Linfócitos B/imunologia , Linhagem Celular Tumoral , Exercício Físico , Exossomos/metabolismo , Feminino , Humanos , Células Matadoras Naturais/imunologia , Leucemia Linfocítica Crônica de Células B/metabolismo , Lipoproteínas/metabolismo , Espectroscopia de Ressonância Magnética , Masculino , Pessoa de Meia-Idade
18.
Obesity (Silver Spring) ; 29(8): 1294-1308, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-34258889

RESUMO

OBJECTIVE: The Action for Health in Diabetes (Look AHEAD) study previously reported that intensive lifestyle intervention (ILI) reduced incident depressive symptoms and improved health-related quality of life (HRQOL) over nearly 10 years of intervention compared with a control group (the diabetes support and education group [DSE]) in participants with type 2 diabetes and overweight or obesity. The present study compared incident depressive symptoms and changes in HRQOL in these groups for an additional 6 years following termination of the ILI in September 2012. METHODS: A total of 1,945 ILI participants and 1,900 DSE participants completed at least one of four planned postintervention assessments at which weight, mood (via the Patient Health Questionnaire-9), antidepressant medication use, and HRQOL (via the Medical Outcomes Scale, Short Form-36) were measured. RESULTS: ILI participants and DSE participants lost 3.1 (0.3) and 3.8 (0.3) kg [represented as mean (SE); p = 0.10], respectively, during the 6-year postintervention follow-up. No significant differences were observed between groups during this time in incident mild or greater symptoms of depression, antidepressant medication use, or in changes on the physical component summary or mental component summary scores of the Short Form-36. In both groups, mental component summary scores were higher than physical component summary scores. CONCLUSIONS: Prior participation in the ILI, compared with the DSE group, did not appear to improve subsequent mood or HRQOL during 6 years of postintervention follow-up.


Assuntos
Diabetes Mellitus Tipo 2 , Qualidade de Vida , Diabetes Mellitus Tipo 2/terapia , Humanos , Estilo de Vida , Sobrepeso/terapia , Redução de Peso
19.
J Nutr ; 140(9): 1653-60, 2010 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-20668251

RESUMO

In this study, we examined if children's food selection met the School Meals Initiative (SMI) standards and the recently released Institute of Medicine (IOM) recommendations. Mean food selection, plate waste, and food intake were also examined. Food intake of 2049 4th-6th grade students was measured objectively at lunch over 3 d with digital photography in 33 schools. The percent of children whose food selection met the SMI standards and IOM recommendations for energy (kJ), fat and saturated fat, calcium, iron, and vitamin A and C were calculated. The SMI standards provide lower limits for most nutrients; the IOM provides a range of values, including an upper limit for energy. Seventy-seven percent of children's energy selection met the SMI lower limit, but only 16% of children met the IOM's recommended range and 74% of children exceeded the upper limit. More than 70% of children exceeded the SMI and IOM's saturated fat recommendations. Children selected (mean +/- SD) 3168 +/- 621 kJ, discarded 882 +/- 581 kJ, and consumed 2286 +/- 716 kJ. Children were less likely to discard fat than carbohydrate, resulting in proportionally more fat being consumed. Most children met SMI and IOM recommendations for protein, calcium, iron, and vitamin A. With few exceptions, energy selection was similar among groups of children, but plate waste differed (P < 0.001), resulting in greater energy intake among boys compared with girls, Caucasians compared with African Americans, and heavier compared with lighter children. Children's selection was high in saturated fat and, based on IOM criteria, included excess energy.


Assuntos
Gorduras na Dieta , Ingestão de Energia , Ácidos Graxos , Preferências Alimentares/psicologia , Serviços de Alimentação , Instituições Acadêmicas , Adolescente , Criança , Fenômenos Fisiológicos da Nutrição Infantil , Pré-Escolar , Feminino , Análise de Alimentos , Humanos , Masculino , National Academies of Science, Engineering, and Medicine, U.S., Health and Medicine Division , Política Nutricional , Valor Nutritivo , Estados Unidos
20.
Am J Health Promot ; 24(5): 340-3, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-20465148

RESUMO

PURPOSE: To examine the influence of an environmental intervention to prevent excess weight gain in African-American children. DESIGN: Single-group repeated measures. SETTING: The intervention was delivered to a school composed of African-American children. PARTICIPANTS: Approximately 45% (N = 77) of enrolled second through sixth grade students. INTERVENTION: The 18-month intervention was designed to alter the school environment to prevent excess weight gain by making healthier eating choices and physical activity opportunities more available. MEASURES: Body mass index percentile was the primary outcome variable. Body mass index z score was also calculated, and percent body fat, using bioelectrical impedance, was also measured. Total caloric intake (kilocalories) and percent kilocalories from fat, carbohydrate, and protein were measured by digital photography. Minutes of physical activity and sedentary behavior were selfreported. ANALYSIS: Mixed-models analysis was used with covarying baseline values. RESULTS: Boys maintained, whereas girls increased, percent body fat over 18 months (p = .027). All children decreased percent of kilocalories consumed from total and saturated fat and increased carbohydrate intake and self-reported physical activity during the intervention (p < .025). Body mass index z score, sedentary behavior, and total caloric intake were unchanged. CONCLUSION: The program may have resulted in maintenance of percent body fat in boys. The percent body fat in girls steadily increased, despite similar behavioral changes as boys. School-based interventions targeting African-American children should investigate strategies that can be effective across gender.


Assuntos
Negro ou Afro-Americano , Exercício Físico , Comportamento Alimentar , Comportamentos Relacionados com a Saúde , Obesidade/prevenção & controle , Tecido Adiposo , Fatores Etários , Índice de Massa Corporal , Carboidratos da Dieta , Ingestão de Energia , Feminino , Seguimentos , Humanos , Estilo de Vida , Masculino , Projetos Piloto , Fatores de Tempo , Aumento de Peso
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