High-intensity functional training with an adequate and carbohydrate restricted hypocaloric diet promotes weight loss and cardiometabolic improvements

INTRODUCTION: Excess body weight and its comorbidities represent a major public health issue. Interventions based on diet and exercise have not only been shown to promote weight loss, but also improve overall health, including cardiovascular health. OBJECTIVE: This study aimed to evaluate the effects of a 12-week hypocaloric low-carbohydrate (CHO) diet coupled with high-intensity functional training (HIFT) on the cardiometabolic risk of overweight adults. METHODS: This is a randomized controlled trial. A total of 31 overweight adults participated in this study, divided into two groups based on the dietary intervention: reduced-CHO (R-CHO, ≤130 g/day; n=15) and adequate-CHO (A-CHO, >130 g/day; n=16). The cardiometabolic risk was assessed using lipidaemic, insulinemia, and glycaemic parameters. A two-way ANOVA with Bonferroni post hoc test was utilized to evaluate the effects of the intervention. A p-value < 0.05 was considered statistically significant. RESULTS: Participants from both groups displayed decreased low-density lipoprotein, very-low-density lipoprotein, total cholesterol, and triacylglycerol concentrations, as well as the number of risk factors for the metabolic disease after 12 weeks. The high-density lipoprotein (HDL) cholesterol concentration of both groups increased after 12 weeks, however, the result of the intragroup analysis revealed that a significant increase was only observed in the participants from the A-CHO group. CONCLUSION: Reduced or adequate CHO intake was both found to be effective in reducing cardiometabolic risk. However, improvements in HDL and final cardiometabolic classification risk indicated that CHO adequacy in the diet might be a better strategy associated with caloric restriction and HIFT.

Efeito da dieta hipocalórica na pressão arterial e demais cofatores da síndrome metabólica / Effect of hypocaloric diet on blood pressure and other cofactors of metabolic syndrome

Introdução: a hipertensão arterial sistêmica (HAS) está associada a fatores de risco metabólicos e pode ser definida como uma doença crônica multifatorial, com valores persistentes de pressão arterial sistólica (PAS) e (ou) pressão arterial diastólica (PAD) maiores ou iguais a 140 mmHg x 90 mmHg, respectivamente. A HAS é um dos fatores que compõem a síndrome metabólica (SM) juntamente com a hiperglicemia, dislipidemia e (ou) obesidade central. Modificações no estilo de vida, como a alimentação e perda de peso, demonstraram melhorar os parâmetros cardiometabólicos nos pacientes com HAS e SM. Objetivo: verificar o efeito de uma dieta hipocalórica na antropometria, na pressão arterial e em outros cofatores da síndrome metabólica. Metodologia: trata-se de um ensaio clínico não randomizado, retrospectivo, com dados secundários, em que o mesmo grupo foi de "intervenção" e "comparador", e cujos dados foram coletados antes (baseline) e após a intervenção. A pesquisa foi realizada com 84 pacientes, adultos, com síndrome metabólica, de ambos os sexos. Os pacientes seguiram dieta com restrição calórica de 200 a 500kcal/dia, com cálculo energético em torno de 20kcal/kg de peso, valor energético total não inferior a 1200kcal, durante um período de dois meses. Foi utilizada estatística descritiva e o teste t pareado ou Wilcoxon-Sign-Rank intragrupo para analisar as variações ao longo do tempo (p < 0,05). Resultado:houve uma redução na antropometria (índice de massa corporal, circunferência da cintura, circunferência do braço e circunferência do quadril), PAS e PAD, glicemia de jejum e triglicerídeos com p< 0,05 dos pacientes após a intervenção, mas não houve melhora no HDL (p > 0,05). Conclusão: a dieta hipocalórica reduziu as medidas antropométricas, a pressão arterial e os demais cofatores da SM nos pacientes avaliados após o acompanhamento de dois meses.

Introduction: systemic arterial hypertension (SAH) is associated with metabolic risk factors and can be defined as a multifactorial chronic disease, with persistent values of systolic blood pressure (SBP) and (or) diastolic blood pressure (DBP) greater than or equal to 140 mmHg x 90 mmHg, respectively. SAH is one of the factors that make up the metabolic syndrome (MS) along with hyperglycemia, dyslipidemia and (or) central obesity. Lifestyle modifications, such as diet and weight loss, have been shown to improve cardiometabolic parameters in patients with SAH and MS. Objective: to verify the effect of a hypocaloric diet on anthropometry, blood pressure and other cofactors of the metabolic syndrome. Methodology: this is a non-randomized, retrospective clinical trial, with secondary data, in which the same group was "intervention" and "comparator", and whose data were collected before (baseline) and after the intervention. Research was carried out with 84 patients, adults, with metabolic syndrome, of both sexes. Patients followed a calorie-restricted diet of 200 to 500kcal/day, with energy calculation around 20kcal/kg of weight, total energy value not less than 1200kcal, during a period of two months. Descriptive statistics and the paired t test or intragroup Wilcoxon-Sign-Rank were used to analyze variations over time (p < 0.05). Result: there was a reduction in anthropometry (body mass index, waist circumference, arm circumference and hip circumference), SBP and DBP, fasting glucose and triglycerides with p<0.05 of patients after the intervention, but there was no improvement in HDL (p > 0.05). Conclusion: the hypocaloric diet reduced anthropometric measurements, blood pressure and other MS cofactors in the patients evaluated after a two-month follow-up.

Ayuno intermitente como opción terapéutica para pacientes con sobrepeso y obesidad / Intermittent fasting as a therapeutic option for overweight and obese patients

Los regímenes basados en la restricción intermitente de la ingesta de alimentos, como el ayuno intermitente, pueden parecer novedosos pero constituyen en realidad una práctica milenaria. Muchas veces en nuestras consultas como médicos de familia los pacientes con problemas de sobrepeso u obesidad nos preguntan sobre estas prácticas y sus efectos en la salud. A partir de la viñeta clínica de uno de esos pacientes, revisamos la evidencia disponible sobre el tema y encontramos que la restricción intermitente puede ser una intervención eficaz para la disminución de peso, aunque sin diferencias significativas con respecto a la restricción continua. Para otros desenlaces analizados, como el riesgo cardiovascular, la evidencia no es tan clara. Si bien la restricción alimentaria intermitente puede ser una opción útil en para los pacientes que desean disminuir su peso, se necesitan más estudios para determinar la variante más adecuada, su duración óptima, la mejor frecuencia semanal y sus beneficios a largo plazo. (AU)

Intermittent dietary restriction, like intermittent fasting, may seem like a novel diet, but it's actually an age-old practice. Many times in our practice as family physicians, patients with overweight or obesity problems ask us about this practice and its effects on health. From the clinical vignette of one of our patients, we reviewed the available evidence on the subject and found that intermittent dietary restriction could be an effective intervention for weight loss, but without significant differences with respect to continuous caloric restriction. For other outcomes analyzed, such as cardiovascular risk, the evidence is not as clear. Al though intermittent dietary restriction may be a useful option in our patients, more studies are needed to determine which variant is the most appropriate, its optimal duration, weekly frequency, and long-term benefits. (AU)

Effect of a low-calorie diet on 24-hour urinary parameters of obese adults with idiopathic calcium oxalate kidney stones

ABSTRACT Purpose: to evaluate the effect of low-calorie diet on 24-hour urinary metabolic parameters of obese adults with idiopathic calcium oxalate kidney stones. Materials and Methods: Adult idiopathic calcium oxalate stone formers, with body mass index (BMI) ≥30kg/m2 and a known lithogenic metabolic abnormality, were submitted to low-calorie diet for twelve weeks. After enrolment, anthropometric measures, serum exams, 24-hour urinary metabolic parameters and body impedance were collected one month prior to dietary intervention and at the end of twelve weeks. Correlations between weight loss, waist circumference loss, fat loss and variation in 24-hour urinary lithogenic parameters and calcium oxalate urinary supersaturation (CaOx SS) as per Tiselius equation were analysed. Results: From January 2017 to January 2018, 39 patients were enrolled to participate in this study. Median (range) prescribed diet was 1300 (1100-2100) Kcal/day. Mean age was 51.7±11.0 (29-68) years old and 69.2% were female. 30.8% of the participants shifted from obesity to BMI <30kg/m2 and none to BMI <25kg/m2. A significant correlation was found between baseline 24-hour urinary oxalate and weight (p=0.018) and BMI (p=0.026). No correlation was found between variation of weight, waist circumference, fat mass and 24-h urinary stone risk factors or CaOx SS. Conclusions: Short-term modest weight loss induced by twelve weeks of low-calorie diet is not associated with a decrease of 24-hour urinary lithogenic parameters in idiopathic calcium oxalate stone formers. Calcium oxalate urinary stone formation is probably multifactorial and driven by other factors than weight.

Principales Estrategias de Intervención Nutricional realizadas en Chile en el decenio 2010-2020: avances y desafíos / Main Nutritional Intervention Strategies carried out in Chile in the 2010-2020 decade: progress and challenges

La alta prevalencia de obesidad en Chile, y su tendencia al aumento, constituye un problema de Salud Pública por su asociación con enfermedades crónicas no transmisibles. Durante la década 2010-2020, el estado de Chile implementó estrategias de intervención nutricional dirigidas a mantener o disminuir la prevalencia de obesidad. Regulaciones como la ley 20.606 sobre composición nutricional de los alimentos y su publicidad para modificar los entornos alimentarios, sistema elige vivir sano como modelo de gestión intersectorial constituido por políticas, planes y programas elaborados y ejecutados por distintos organismos del Estado, destinados a contribuir a generar hábitos y estilos de vida saludable y a prevenir y disminuir los factores y conductas de riesgo asociados a las enfermedades no transmisibles. A pesar de todos los esfuerzos, las encuestas poblacionales han demostrado que la obesidad continúa en aumento a lo largo del ciclo vital, por lo que es necesario fortalecer las estrategias existentes, pero con enfoque de determinantes sociales y de salud en todas las políticas, y a su vez mejorar los sistemas de evaluación de las estrategias implementadas en la población, midiendo su impacto además de su ejecución.

The high prevalence of obesity in Chile, and its increasing trend, constitutes a Public Health problem due to its association with chronic non-communicable diseases. During the 2010-2020 decade, the state of Chile implemented nutritional intervention strategies aimed at maintaining or reducing the prevalence of obesity. Regulations such as Law 20.606 on the nutritional composition of food and its advertising to modify food environments, Sistema chooses to live healthy System "EVS" Choose Healthy lifestyles as an intersectoral management model made up of policies, plans and programs prepared and executed by different State agencies, intended to contribute to healthy habits and lifestyles and to prevent and reduce risk factors and behaviors associated with non-communicable diseases. Despite all efforts, population surveys have shown that obesity continues to increase throughout the life cycle, which is why it is necessary to strengthen existing strategies, but with a focus on social and health determinants in all policies, since in turn, improve the evaluation systems of the strategies implemented in the population, measuring their impact, in addition to their implementation.

Intermittent fasting for obesity and related disorders: unveiling myths, facts, and presumptions

ABSTRACT Intermittent fasting (IF) is an increasingly popular method of weight loss, as an alternative to daily caloric restriction (DCR). Several forms of IF exist, such as alternate-day fasting or time-restricted feeding regimens. Some of its proponents claim several health benefits unrelated to caloric restriction or weight loss, which rely mainly on animal models. Although several studies published in the last few years confirm that IF can be a useful and safe therapeutical option for obesity and related disorders, no superiority to conventional caloric restriction diets have emerged. There are still several questions left answered. In this Review, we discuss some of the claims, unveiling myths, facts, and presumptions about several models of IF. The focus of this article is obesity, but there is a brief discussion of the potential benefits of IF on overall human health.

The ATP Level in the mPFC Mediates the Antidepressant Effect of Calorie Restriction / 神经科学通报·英文版

Food deprivation can rescue obesity and overweight-induced mood disorders, and promote mood performance in normal subjects. Animal studies and clinical research have revealed the antidepressant-like effect of calorie restriction, but little is known about the mechanism of calorie restriction-induced mood modification. Previous studies have found that astrocytes modulate depressive-like behaviors. Inositol 1,4,5-trisphosphate receptor type 2 (IP3R2) is the predominant isoform in mediating astrocyte Ca

Influência da restrição alimentar e do estresse térmico sobre parâmetros fisiológicos em ovinos / [Influence of food restriction and heat stress on physiological parameters in sheep]

Objetivou-se avaliar as alterações fisiológicas de ovinos submetidos à restrição alimentar, expostos à radiação solar e à sombra. Dez borregas mestiças foram divididas igualmente em dois grupos: grupo radiação solar - GRS, animais expostos ao sol durante o dia; e grupo sombra - GS, animais alocados dentro de um galpão à sombra. Nos seis dias iniciais de experimento, os animais foram submetidos à restrição alimentar, com acesso apenas à água, já expostos ao sol ou à sombra. Nos seis dias subsequentes, foi ofertada dieta composta por ração e feno de alfafa (3%PV). Os parâmetros avaliados foram frequência respiratória (FR), temperatura retal (TR), ß-hidroxibutirato (BHB), pH urinário, ingestão de matéria seca (IMS) e dados bioclimáticos (temperatura, umidade relativa do ar e índice de temperatura e umidade - ITU). A FR foi o parâmetro em que houve maior diferença significativa entre os grupos (p<0,05). O balanço energético negativo foi constatado em todos os animais (BHB>0,8mmol/L; pH<7,0). Ovelhas que sofrem restrição alimentar durante períodos de alta temperatura e umidade têm menor frequência respiratória e temperatura interna, independentemente de estar na sombra ou pleno sol. Porém, quando normalizado a oferta de alimento as ovelhas em pleno sol têm menor ingestão de matéria seca.(AU)

We aimed to evaluate physiological changes in sheep submitted to food restriction, exposed to the sun or shade. Ten ewe lambs were equally divided into two groups: Sun Radiation Group - GRS, exposed to sun during day hours, and Shade Group - GS, with animals placed inside a barn. In the first six days of experiment, animals were submitted to food restriction, with access to fresh water, already exposed to sun and shade. In the following six days alfalfa hay and concentrate were provided to the animals (3%BW). Parameters assessed were respiratory rate (FR), rectal temperature (TR), ß-hydroxybutyrate, urinary pH, dry matter intake (IMS) and climate data (air temperature, humidity, and temperature-humidity index - ITU). The parameter that most differed between groups was FR. All animals presented negative energy balance (BHB>0.8mmol/L; pH<7,0). Ewe lambs submitted to food restriction during periods of high temperature and humidity have lower respiratory rate and intern temperature, independently of being exposed to sun or shade. However, when food was offered animals exposed to sun had lower dry matter intake.(AU)

Dieta Intermitente Atenua a Remodelação Cardíaca Causada pelo Exercício Físico / Intermittent Fasting Attenuates Exercise Training-Induced Cardiac Remodeling

Resumo Fundamento A influência de intervenções não farmacológicas como restrição calórica e exercício físico sobre a saúde e prevenção de enfermidades cardíacas tem sido documentada em estudos clínicos e experimentais. Objetivo Analisar a influência da combinação entre dieta intermitente e exercício físico sobre a capacidade funcional, metabolismo glicêmico e remodelação cardíaca. Métodos Foram utilizados 60 ratos Wistar machos distribuídos em quatro grupos: Controle (C), Exercício Físico (EF), Dieta Intermitente (DI) e Exercício Físico e Dieta Intermitente (EDI). Durante 12 semanas, enquanto C e EF foram tratados diariamente com dieta comercial padrão ad libitum, DI e EDI receberam dieta similar em dias alternados com dias de jejum. Os grupos EF e EDI foram submetidos a protocolo de corrida em esteira rolante. Posteriormente, foram analisadas capacidade funcional, comportamento nutricional e metabolismo glicêmico. Além da morfologia do coração, a expressão proteica das proteínas extracellular signal-regulated kinase (ERK) e c-Jun N-terminal kinase (JNK) no coração foi avaliada por Western-blot. A análise dos resultados foi feita por meio de Two-Way ANOVA e teste de Student-Newman-Keuls. O nível de significância considerado foi de 5%. Resultados O exercício físico aumentou a capacidade funcional nos grupos EF e EDI, e acarretou fibrose cardíaca. A combinação entre dieta intermitente e exercício físico resultou em menor área sob a curva de glicemia e menores medidas de área e interstício cardíaco no EDI em relação ao EF. A expressão de proteínas ERK e JNK foi similar entre os grupos (p>0,05). Conclusões Dieta intermitente se associa com melhor tolerância glicêmica e atenua o processo de remodelação cardíaca decorrente do exercício físico. (Arq Bras Cardiol. 2020; 115(2):184-193)

Abstract Background The effects of non-pharmacological interventions such as calorie restriction and exercise training on health and prevention of cardiovascular diseases have been investigated in clinical and experimental studies. Objective To analyze the influence of intermittent fasting and exercise training on functional fitness, glycemia and cardiac remodeling. Methods Wistar rats (n=60) were randomly divided into four groups: control, exercise training (ET), intermittent fasting (IF) and exercise training plus intermittent fasting (ETI). Over 12 weeks, control and ET animals were fed daily a standard commercial diet ad libitum , while IF and ETI animals were fed every other day. In addition, the ET and ETI groups were submitted to a running protocol on a treadmill. After this period, functional fitness, nutritional parameters and blood glucose levels were analyzed. In addition to heart morphology, myocardial protein expression of extracellular signal-regulated kinase (ERK) and c-Jun N-terminal kinase (JNK) was assessed by Western-blot. The results were analyzed using two-way ANOVA and Student-Newman-Keuls test. The level of significance considered was 5%. Results Exercise training increased functional fitness in the ET and ETI groups and promoted cardiac fibrosis. The combination of intermittent fasting and exercise training resulted in a smaller area under the blood glucose curve and reduced cardiomyocyte cross-sectional area and interstitial collagen fraction in the ETI group compared to ET. ERK and JNK expression levels were similar among groups (p>0.05). Conclusions Intermittent fasting is associated with improved glucose tolerance and attenuates cardiac remodeling induced by exercise training (Arq Bras Cardiol. 2020; 115(2):184-193)

Influência da nutrição na expressão de genes relacionados à obesidade / Influence of nutrition on the expression of genes related to obesity

A obesidade possui vários prejuízos para a saúde e está associada à inúmeras patologias e baixa expectativa de vida. O desequilíbrio alimentar é um fator que necessita de atenção especial, pois é capaz de alterar as interações entre nutrientes e genes. O objetivo deste trabalho foi verificar as principais linhas de pesquisa associadas à nutrigenômica, e evidenciar a relação da influência da nutrição na expressão de genes relacionados à obesidade. Realizou-se o levantamento bibliográfico e a análise cienciométrica por meio do banco de dados publicados na Biblioteca Virtual em Saúde (BVS) e do Centro Latino-Americano de Informação em Ciências da Saúde (BIREME). Identificou-se 118 artigos originais, os quais foram agrupados em cinco classes: restrição calórica, expressão gênica, alimentos, intervenção dietética e diversos. Os resultados evidenciaram que a restrição calórica possui relação direta da expressão gênica com o controle das células cancerígenas e a diminuição do excesso de tecido adiposo. Além disso, a análise cienciométrica relacionou a importância das fibras alimentares na redução do colesterol e sensibilidade à insulina, bem como a ação do jejum na regulação negativa de genes que contribuem para o crescimento do tecido adiposo. Dessa forma, este artigo fornece princípios ideológicos para auxiliar especialistas na aplicabilidade de estratégias para atingir a redução de peso sustentável por meio da expressão gênica.

Obesity has several health risks and is associated with numerous pathologies and low life expectancy. Food imbalance is a factor that needs special attention, as it is able to change the interactions between nutrients and genes. This study aimed at verifying the main lines of research associated with nutrigenomics, and at showing the relationship of the influence of nutrition on the expression of genes related to obesity. The bibliographic survey and scientometric analysis were carried out through the database published in the Biblioteca Virtual em Saúde (BVS) and the Centro Latino-Americano de Informação em Ciências da Saúde (BIREME). A total of 118 articles of original research were identified, and were grouped into five categories: caloric restriction; gene expression; food; dietary intervention; and miscellaneous. The results showed that caloric restriction has a direct relationship between gene expression and the control of cancer cells and the reduction of excess adipose tissue. Furthermore, the scientometric analysis related the importance of dietary fibers in reducing cholesterol and insulin sensitivity as well as the action of fasting in the negative regulation of genes that contribute to the growth of adipose tissue. Thus, this paper provides ideological principles to assist specialists in the applicability of strategies to achieve sustainable weight reduction through gene expression.

Efectos de la actividad física sobre el consumo y selección de alimento en ratas que fueron expuestas a restricción alimentaria durante la gestación / Effects of physical activity on the consumption and selection of food in rats that were exposed to food restriction during pregnancy

Las alteraciones durante la vida prenatal tienen diversos efectos en los organismos. La restricción alimentaria materna ocasiona modificaciones en la conducta alimentaria como hiperfagia y su exacerbación ante la exposición a una dieta hiperlipídica. La evidencia experimental indica que aun cuando existe una preferencia por los alimentos altos en grasa, cuando las ratas realizan actividad física, esta preferencia disminuye o se elimina. Objetivo: evaluar el efecto de la restricción alimentaria materna sobre el consumo de una dieta suplementada con nuez pecana y cómo influye la actividad física. El experimento incluyó 22 ratas, 11 del grupo experimental y 11 del grupo control. De los cuales 6 realizaron actividad y 5 permanecieron sedentarias en cada grupo (machos y hembras). El experimento duró 114 días, de los cuales 42 días tuvieron disponible la rueda de actividad. Los resultados mostraron que la restricción alimentaria materna no modificó el comportamiento alimentario, sin embargo, cuando incrementaron la actividad por la disponibilidad de la rueda de actividad, los sujetos experimentales aumentaron su consumo de nuez pecana. Los resultados se consideran contradictorios con respecto a la literatura, ya que muestran ausencia de hiperfagia e incremento en el consumo a la par del incremento en actividad física.

Alterations during prenatal life have various effects on organisms. Maternal food restriction causes changes in feeding behavior such as hyperphagia and its exacerbation when exposed to a hyperlipidic diet. Experimental evidence indicates that even when there is a preference for high-fat foods, when rats do physical activity, this preference decreases or is eliminated. Objective: to evaluate the effect of maternal dietary restriction on the consumption of a diet supplemented with pecan nuts and how physical activity influences this relationship. The experiment included 22 rats, 11 experimental and 11 controls. Of these, 6 performed physical activity and 5 remained sedentary in each group (males and females). The experiment lasted 114 days; the activity wheel was available on 42 days. The results showed that maternal food restriction did not modify eating behavior, however, when rats increased physical activity, experimental subjects increased their consumption of pecan nuts. The results are contradictory with respect to the literature, as they show an absence of hyperphagia and an increase in consumption along with an increase in physical activity.

¿Qué dieta seleccionar en el tratamiento de la obesidad? / Which diet to select in the treatment of obesity?

La nutrición equilibrada es fundamental dentro del tratamiento del sobrepeso y la obesidad. Se ha reportado que la pérdida de peso constituye la fórmula más efectiva para su tratamiento, se ha evidenciado que cada kg de pérdida de peso está asociado con una reducción del riesgo para diabetes y enfermedades cardiovasculares. Sin embargo perder peso y mantenerlo puede ser difícil, por lo que se ha estudiado desde varios tópicos la terapia dietética. El objetivo de la presente investigación fue describir las evidencias sobre la efectividad de la dieta seleccionada según el criterio del aporte energético, la distribución de los macronutrientes, la fibra dietética, la respuesta glucémica e insulínica y la distribución horaria sobre el peso corporal y las alteraciones metabólicas. Se realizó una revisión bibliográfica a través de las bases de datos Pubmed, Scopus, Dialnet, Scielo y Google Academics, desde el 2000 hasta noviembre 2020. Existe una gran diversidad de dietas propuestas para perder peso, siempre el balance energético debe ser negativo, aunque las estrategias estén determinadas por el aporte energético o de los macronutrientes o en la restricción de nutrientes específicos o en la manipulación del tiempo. La pérdida de peso corporal suele ser mayor en los primeros 6 meses, pero no es significativa. A largo plazo, las diferentes dietas promueven una pérdida de peso similar. Conclusión: la dieta debe tener un balance energético negativo, buena calidad y favorecer la adherencia del paciente(AU)

Balanced nutrition is essential in the treatment of overweight and obesity. Weight loss has been reported as the most effective formula for its treatment; it has been shown that each kg of weight loss is associated with a reduction in the risk of diabetes and cardiovascular diseases. However, losing weight and maintaining it can be difficult, which is why dietary therapy has been studied from various topics. The objective of this research was to describe the evidence on the effectiveness of the diet selected according to the criterion of energy intake, the distribution of macronutrients, dietary fiber, the glycemic and insulin response and the hourly distribution on body weight and alterations metabolic. A bibliographic review was carried out through the databases Pubmed, Scopus, Dialnet, Scielo and Google Academics, from 2000 to November 2020. There is a great diversity of diets proposed to lose weight, the energy balance must always be negative, although strategies are determined by energy intake or macronutrients or by restricting specific nutrients or manipulating time. Body weight loss is usually greatest in the first 6 months, but it is not significant. In the long term, different diets promote similar weight loss. Conclusion: the diet must have a negative energy balance, good quality and favor the adherence of the patient(AU)

Moderate intensity swimming training on bone mineral density preservation under food restriction in female rats

Abstract Aim: To investigate the effect of moderate-intensity swimming training on bone mineral density under a 20% food restriction (FR) schedule for 12 weeks in female rats. Methods: Forty female Wistar rats were distributed into four groups: control (CG), exercised (EG), food restriction (FRG), and food restriction/exercised (FREG). At 95 days. the animals were subjected to aquatic adaptation and then performed the critical load test to individually determine the critical load intensity (CLi, % of body mass). Exercised groups swam 5 days a week, 30 minutes daily with weekly adjustment of the load equivalent to 80% of the CLi. The FR schedule was 20% in relation to CG and started concomitantly with physical training (PT). After 12 weeks, visceral fat weight was recorded and the femur was collected for biophysical and biomechanical analysis. Results: FR and exercise training promoted visceral fat reduction (p<0.01). FR reduced bone mineral density (p<0.01), while exercise training prevented such reduction. On the other hand, FR and exercise training did not promote significant changes in biomechanical parameters of the femur. Conclusion: Exercise training at moderate intensity was efficient in preserving bone mineral density despite long term of FR at 20%.

Feed restriction since lactation has reduced anxiety in adult Wistar rats / A restrição alimentar desde a lactação reduziu a ansiedade em ratos Wistar adultos

ABSTRACT Objective To evaluate the effects of macronutrients (protein, carbohydrate and/or lipid) in the diet of young adult (72 days) and adult (182 days) Wistar rats treated ad libitum and with 30% restriction from birth on anxiety in the elevated plus-maze. Methods We used 238 rats treated from birth, composing the groups: Control, Protein, Carbohydrate, Lipid, Carbohydrate and Lipid, Control Restriction, Protein Restriction, Carbohydrate Restriction, Lipid Restriction and Carbohydrate and Lipid Restriction. The animals were weighed at the beginning and at the end of the experiment and tested in the elevated plus-maze. Data were submitted to analysis of variance, followed by the Newman-Keuls Test (p<0.05). Results Among the animals treated ad libitum, the Control, Carbohydrate plus Lipid and Lipid gained more weight than the Carbohydrate and Protein; ad libitum animals gained more weight than those on restriction; among the restrictions, Carbohydrate Restriction rats were the ones that gained less weight. Diet-restricted animals exhibited reduced first-entry latency, greater percentage of entries and time spent, frequency of open arm extremity visits, head dipping (protected and unprotected), and length of stay in the central area of the elevated plus-maze. The animals with 182 days presented greater latency for first entry, reduced frequency of false entries and visits to the ends of the open arms and protected head dipping. Conclusion Food restricted animals, regardless of the macronutrient present in the diet, were less anxious and/or increased their impulsivity and those at 182 days were more anxious and/or with reduced impulsivity.

RESUMO Objetivo Este estudo buscou avaliar os efeitos dos macronutrientes (proteína, carboidrato e/ou lipídeos) na alimentação de ratos Wistar adultos jovens (72 dias) e adultos (182 dias) tratados ad libitum e com restrição a 30% desde o nascimento quanto à ansiedade através do labirinto em cruz elevado. Métodos Foram utilizados 238 ratos tratados desde o nascimento, compondo os grupos Controle, Proteína, Carboidrato, Lipídeos, Carboidrato e Lipídeos, Restrição Controle, Restrição Proteína, Restrição Carboidrato, Restrição Lipídeos e Restrição Carboidrato e Lipídeos. Os animais foram pesados no início e no final do experimento e testados no labirinto em cruz elevado. Os dados foram submetidos à análise de variância, seguida do teste de Newman-Keuls (p<0,05). Resultados Entre os animais tratados ad libitum, os dos grupos Controle, Carboidrato e Lipídeos, e Lipídeos ganharam mais peso do que os Carboidrato e Proteína; os ad libitum ganharam mais peso do que os de restrição; os Restrição Carboidrato foram os que ganharam menos peso. Animais alimentados com restrição de dieta apresentaram menor latência de primeira entrada, maior porcentagem de entradas e de tempo gasto, frequência de visitas às extremidades dos braços abertos, de mergulho (protegido e desprotegido) e tempo de permanência na área central do labirinto em cruz elevado. Os animais com 182 dias demonstraram maior latência para primeira entrada, menor frequência de falsas entradas e visitas às extremidades dos braços abertos e mergulho protegido. Conclusão Os animais em restrição alimentar, independentemente do macronutriente presente na dieta, foram menos ansiosos e/ou mais impulsivos, e os com 182 dias foram mais ansiosos e/ou menos impulsivos.

The effects and mechanism of caloric restriction on energy metabolism / 生理学报

Caloric restriction (CR) is explored to limit the caloric intake without malnutrition. CR can affect the levels of various metabolites in organism, such as lipids, free fatty acids, ketones, bile acids and amino acids, etc, and is thought being able to extend the lifespan, postpone and reduce the incidence of age-related disorders (e.g., type 2 diabetes, cancer and cardiovascular diseases). These effects are mainly attributed to the role of CR in energy metabolism. The mechanism of CR on energy metabolism is closely related to biological clock, hormonal production, gastrointestinal flora and inflammation. Here we briefly review the effects and mechanism of CR on energy metabolism.

The Effects of Meal Timing and Frequency, Caloric Restriction, and Fasting on Cardiovascular Health: an Overview

Cardiovascular disease (CVD), which is the leading cause of death worldwide, is strongly affected by diet. Diet can affect CVD directly by modulating the composition of vascular plaques, and indirectly by affecting the rate of aging. This review summarizes research on the relationships of fasting, meal timing, and meal frequency with CVD incidence and progression. Relevant basic research studies, epidemiological studies, and clinical studies are highlighted. In particular, we discuss both intermittent and periodic fasting interventions with the potential to prevent and treat CVD.

Deuda calórica en una cohorte de pacientes hospitalizados en unidades de cuidado intensivo / Caloric debt in a cohort of intensive care unit patients

El soporte nutricional que se brinda a los pacientes críticos, constituye para la mayoría la única vía de acceso a través de la cual es posible cubrir sus requerimientos nutricionales diarios. Sin embargo, se ha identificado que la presencia de deuda calórica impide cubrir dichos requerimientos. Este estudio determinó la deuda calórica y su potencial efecto clínico a través de una cohorte prospectiva que incluyó 191 pacientes que recibieron soporte nutricional en unidades de cuidado intensivo (UCI). Se evaluó la magnitud de la deuda calórica, los principales factores que la favorecen y se exploraron diferencias en desenlaces clínicos relacionados con mortalidad, complicaciones infecciosas y tiempo de estancia en UCI. Los resultados evidenciaron que la deuda calórica estuvo presente en el 73,8%(IC 95% = 67%-80%) de los pacientes evaluados; la principal causa estuvo relacionada con la interrupción de la nutrición enteral y no se encontró asociación entre el porcentaje de adecuación calórico y los desenlaces evaluados. Esta evaluación permitió establecer que la mayoría de los pacientes, a pesar de recibir soporte nutricional, se encuentran expuestos a deuda calórica siendo necesario generar estrategias de atención que permitan disminuir la exposición de esta población a dicha condición.

The nutritional support offered to critically ill patients is, for most of them, the only means to fulfill their daily nutritional requirements. However, it has been documented that nutritional support is not enough to cover such needs, due to the presence of caloric debt. We seek to determine the caloric debt and its potential to clinical affect critically ill patients that receive nutritional support in the Intensive Care Unit (ICU). We conducted a prospective cohort study with 191 patients. We assessed the magnitude of caloric debt and its related factors. We also explored variations in clinical outcomes related to mortality, infectious complications and ICU stay length. Caloric debt was found in 73.8% (95% CI = 67-80%) of patients who received less than 80% of their daily caloric requirements. Main causes were related to enteral nutrition interruption. We found no association between caloric debt and the evaluated outcomes. This evaluation made it possible to establish that the majority of patients, despite receiving nutritional support, were exposed to caloric debt, and it is necessary to generate care strategies to reduce the patients' exposure to this condition.

Aceitação sensorial de biscoito de polvilho convencional e light / Sensory acceptance of conventional and light cassava starch biscuit

O sódio está presente na maioria dos produtos industrializados, e seu consumo em excesso pode trazer riscos à saúde. Assim, o presente trabalho teve como objetivo avaliar a aceitação sensorial de biscoito de polvilho convencional e light (com redução de 50% de sódio). Para isso, foi realizada análise sensorial com 60 julgadores não treinados através de escala hedônica e do ideal estruturadas de 9 pontos. De acordo com os resultados obtidos, as amostras de biscoitos de polvilho (convencional e light) obtiveram boa aceitação sensorial, uma vez que os resultados variaram na região de aceitação da escala hedônica entre as categorias “gostei ligeiramente” e “gostei muito”. Contudo, os biscoitos de polvilho convencionais tiveram maior aceitação em relação as amostras light quanto aos termos crocância e sabor salgado.