The Effects of Ketogenic Diet on Insulin Sensitivity and Weight Loss, Which Came First: The Chicken or the Egg?

The ketogenic diet (KD) is, nowadays, considered an interesting nutritional approach for weight loss and improvement in insulin resistance. Nevertheless, most of the studies available in the literature do not allow a clear distinction between its effects on insulin sensitivity per se, and the effects of weight loss induced by KDs on insulin sensitivity. In this review, we discuss the scientific evidence on the direct and weight loss mediated effects of KDs on glycemic status in humans, describing the KD's biochemical background and the underlying mechanisms.

Effects of COVID-19 on diaphragm thickness and physical performance of athletes / Efeitos da COVID-19 na espessura diafragmática e desempenho físico de atletas

Abstract Introduction Studies suggest that diaphragm thickness (DT) is associated with inspiratory muscle strength and consequently, better ventilatory and mechanical efficiency. On the other hand, infectious diseases such as COVID-19 may impact the structure and function of the respiratory system. Objective Assess the association between DT and the physical performance (PP) of athletes and the effects of COVID-19 infection on these parameters. Methods This is a cross-sectional study of 63 athletes of both sexes from different sport modalities (women: 16.67 ± 5.03 years, 52.09 ± 14.01 kg, 155.90 ± 13.86 cm; men: 23.44 ± 9.65 years, 72.24 ± 14.18 kg, 174.84 ± 6.84 cm), submitted to DT assessment using ultrasound, followed by the PP(Yo-Yo) test) to determine maximum oxygen intake (VO2max). Pearson's correlation was used to determine the association between VO2max and DT, and the Student's t-test for differences between athletes with a positive and negative diagnosis for COVID-19. The significance level was set at 5%. Results There was no association between DT and PP (r = 0.30 and p = 0.22) or between athletes unaffected and affected by COVID-19 in relation to DT (57.00 ± 0.26 vs 52.00 ± 0.25%; p = 0.91) and PP (43.88 ± 2.29 vs 38.34 ± 13.61 ml/kg/min; p = 0.69). Conclusion DT was not associated with maximum oxygen intake in athletes. In addition, athletes infected by COVID-19 exhibited no differences in VO2max or DT when compared to nonaffected individuals.

Resumo Introdução Estudos sugerem que a espessura diafrag-mática (ED) está associada à força muscular inspiratória e, consequentemente, à melhor eficiência ventilatória e mecânica. Por outro lado, doenças infecciosas como a COVID-19 podem impactar a estrutura e função do apa-relho respiratório. Objetivo Avaliar a associação entre a ED e o desempenho físico (DF) de atletas e os efeitos da infecção por COVID-19 sobre esses parâmetros. Métodos Trata-se de um estudo transversal envolvendo 63 atletas de diferentes modalidades esportivas, de ambos os sexos (feminino: 16,67 ± 5,03 anos, 52,09 ± 14,01 kg, 155,90 ± 13,86 cm; masculino 23,44 ± 9,65 anos, 72,24 ± 14,18 kg, 174,84 ± 6,84 cm), que foram submetidos à avaliação da ED por meio de ultrassom e, em seguida, ao teste de DF (Yo-Yo test) para determinar o consumo máximo de oxigênio (VO2max). Utilizou-se a correlação de Pearson para verificar a associação entre VO2max e ED, e o teste t de Student para diferenças entre atletas com diagnóstico positivo e negativo para COVID-19. O nível de significância foi ajustado em 5%. Resultados Não houve associação entre ED e DF (r = 0,30 e p = 0,22) e não houve diferença entre os atletas não infectados e infectados por COVID-19 em relação à ED (57,00 ± 0,26 vs 52,00 ± 0,25%; p = 0,91) e DF (43,88 ± 2,29 vs 38,34 ± 13,61 ml/kg/min; p = 0,69). Conclusão A ED não foi associada ao consumo máximo de oxigênio em atletas. Além disso, atletas infectados por COVID-19 não exibiram diferenças no VO2max e ED em relação aos não infectados.

Physical Performance of Brazilian Military Policemen: A Longitudinal Analysis by Occupational Specialties.

Maintenance of good levels of physical fitness is essential during occupational tasks for the general health of the military police. However, no studies have evaluated longitudinal changes in the physical fitness of Brazilian military police officers according to their specialties. Thus, the objective of the current study was to analyze the changes in the physical fitness of military police officers according to their specialty, over a period of five years. Retrospective data (2015-2019) from 290 police officers were analyzed, including age and physical fitness tests (12-min run test, sit-ups, push-ups, and pull-ups on the bar). The sample was divided into four groups (Specialized; Border; Urban; and Environmental). ANCOVA was used to describe differences in physical fitness components between groups of police officers after adjusting for age. Initial fitness was higher among police officers in the Specialized group (i.e., those with greater physical demands). During the five-year follow-up period, there was an age-related decrease in physical capacity for all groups, regardless of specialty. However, Urban police showed improvement in running and sit-up tests (p < 0.05) over time. Changes in physical capacity during follow-up differed depending on the physical component analyzed and the occupational specialty.

Physical Activity Guidelines for the Brazilian Population: Recommendations Report.

BACKGROUND: This article presents the recommendations from the Physical Activity Guidelines for the Brazilian Population. METHODS: A steering committee composed of a chair, 6 experts in physical activity, and representatives from the Ministry of Health/Brazil, Pan American Health Organization, Brazilian Society of Physical Activity and Health designed the guidelines, which was implemented by 8 working groups, as follows: (1) understanding physical activity, (2) children up to 5 years old, (3) children and youth from 6 to 17 years old, (4) adults, (5) older adults (60 years and above), (6) physical education at school, (7) pregnant and postpartum women, and (8) people with disabilities. The methodological steps included evidence syntheses, hearings with key stakeholders, and public consultation. RESULTS: Across 8 chapters, the guidelines provide definitions of physical activity and sedentary behavior, informing target groups on types of physical activity, dosage (frequency, intensity, and duration), benefits, and supporting network for physical activity adoption. The guidelines are openly available in Portuguese, Spanish, English, and Braille and in audio versions, with a supplementary guide for health professionals and decision makers, and a report about the preparation and references. CONCLUSIONS: The Physical Activity Guidelines for the Brazilian Population provide evidence-based recommendations, being a public-directed resource to contribute to the physical activity promotion in Brazil.

Physical Activity Guidelines for the Brazilian Population: Development and Methods.

BACKGROUND: This article describes the process and methods used in the development of the first ever Physical Activity Guidelines for the Brazilian Population. METHODS: The steering committee established 8 working groups based on other guidelines and the Brazilian agenda for public health and physical activity (PA) promotion: (1) understanding PA; (2) children up to 5 years; (3) children and youth (6-17 y); (4) adults; (5) older adults (60 years and above); (6) physical education at school; (7) pregnant and postpartum women; and (8) people with disabilities. Working groups were formed to (1) synthesize the literature on each topic; (2) conduct workshops with stakeholders, health professionals, researchers, and the public; and (3) prepare a draft chapter for open online consultation. RESULTS: The document provides guidance for the population on the benefits of being active and recommendations regarding the amount (frequency, intensity, and duration) of PA recommended across all chapters. It also includes information on supporting networks for PA. CONCLUSIONS: The PA guidelines are widely accessible in Portuguese, including versions in English, Spanish, audiobook, and Braille, and will assist policy makers and professionals from several sectors to promote PA. The ultimate goal is to increase population levels of PA in Brazil.

A scoping review of intermittent fasting, chronobiology, and metabolism.

Chronobiology plays a crucial role in modulating many physiologic systems in which there is nutritional synergism with meal timing. Given that intermittent fasting (IF) has grown as a flexible dietary method consisting of delayed or early eating windows, this scoping review addresses the effects of IF protocols on metabolism as they relate to clinical nutrition and the circadian system. Although nocturnal habits are associated with circadian misalignments and impaired cardiometabolic profile-and nutritional physiology is better orchestrated during the day-most findings are based on animal experiments or human studies with observational designs or acute meal tests. Well-controlled randomized clinical trials employing IF protocols of delayed or early eating windows have sometimes demonstrated clinical benefits, such as improved glycemic and lipid profiles, as well as weight loss. However, IF does not appear to be more effective than traditional diets at the group level, and its effects largely depend on energy restriction. Thus, efforts must be made to identify patient biological rhythms, preferences, routines, and medical conditions before individual dietary prescription in clinical practice.

Changes in Compliance With Physical Activity Guidelines and Cardiovascular Disease Mortality.

BACKGROUND: The effects of compliance with the US Physical Activity (PA) Guidelines and changes in compliance over time on cardiovascular disease (CVD) mortality are unknown. METHODS: Male participants in the Aerobics Center Longitudinal Study (n = 15,411; 18-100 y) reported leisure-time PA between 1970 and 2002. The frequency of and time spent in PA were converted into metabolic equivalent minutes per week. The participants were classified into remained inactive, became active, became inactive, or remained active groups according to their achievement of the PA guidelines along the follow-up, equivalent here to at least 500 metabolic equivalent minutes of PA per week. Cox regression adjusted for different models was used for the analyses, using age, body mass index, smoking and drinking status, hypertension, diabetes, hypercholesterolemia, and parental history of CVD. RESULTS: Over a mean follow-up of 6.2 years, 439 CVD deaths occurred. Consistently meeting the PA guidelines, compared with not meeting, was associated with a 54% (95% confidence interval, 0.32-0.67) decreased risk of CVD mortality. After controlling for all potential confounders, the risk reduction was 47% (95% confidence interval, 0.36-0.77). CONCLUSIONS: Maintaining adherence to the PA guidelines produces substantial reductions in the risk of CVD deaths in men. Furthermore, discontinuing compliance with the guidelines may offset the beneficial effects on longevity.

A estratégia LET US Play aumenta a atividade física de crianças nas aulas de educação física escolar / The LET US Play strategy increases children`s physical activity in physical education classes

O estudo objetivou comparar duas estratégias (Tradicional x LET US Play) com o intuito de aumen-tar o número de passos (NP) durante as aulas de educação física escolar de crianças. Trata-se de um ensaio clínico randomizado cruzado (cross over), realizado em uma escola municipal de Cuiabá, Mato Grosso. Foram aplicadas 10 aulas à 25 crianças (11 meninos e 14 meninas) do 4º ano do Ensino Fun-damental. Dividida em dois momentos de 15 minutos (monitorados), com um espaço de 10 minutos entre eles para hidratação (não monitorados), a aula consistia na aplicação das atividades (estafeta, base quatro, futsal, queimada e empresta bandeira) usando a estratégia Tradicional ou LET US Play, de forma alternada e aleatória. Ao final de cada atividade, o NP foi medido por meio da pulseira inteligente Xiaomi Mi band 2. Utilizou ANOVA One Waypara analisar o NP entre as estratégias, estratificada por sexo, com grau de significância de 5%. Observou-se que, o NP dados pelas crianças na intervenção LET US Play foi superior ao Tradicional em todas as atividades (estafeta, base quatro, futsal, queimada, empresta bandeira), tanto em meninos quanto em meninas, independentemente da ordem de aplicação (p < 0,01). Conclui-se que o LET US Play aumentou o NP das crianças durante as aulas de educação física e pode ser uma estratégia interessante para maximizar a atividade física nesse público

This study aimed to compare two strategies (Traditional x LET US Play) focused on increasing the number of steps (NS) during physical education classes for children. This is a randomized crossover clinical trial, carried out in a municipal elementary school from Cuiabá-MT. Ten classes were given to 25 children (11 boys and 14 girls) from the 4th grade. Divided into two moments of 15 minutes each (monitored), with a 10 minutes break between for hydration (not monitored). The class sessions consisted of activities (relay races, base four, futsal, dodgeball and borrow flag) using Traditional or LET US Play strategies, selected randomly and alternately. At the end of each activity the NS was measured through the Xiaomi Mi band 2 smart bracelet. The NP between the strategies and interactions with sex were assessed using one-way analysis of variance (ANOVA) with a statistical significance set at p < 0.05. It was observed that the NS given by the children in the LET US Play intervention was higher than the Traditional in all activities (relay races, kickball, indoor soccer, dodgeball, lend flag) in boys and girls regardless of the delivered order (p < 0,01). It was concluded that LET US Play increased children's NS during physical education classes and can be an interesting strategy to maximize physical activity among this population

Atividade física para idosos: Guia de Atividade Física para a População Brasileira / Physical activity for older adults: Physical Activity Guidelines for the Brazilian Population

Por iniciativa do Ministério da Saúde, em colaboração com pesquisadores nacionais, elaborou-se o primeiro Guia de Atividade Física (AF) para a População Brasileira, incluindo recomendações para as várias fases da vida e populações especiais. O objetivo deste estudo é apresentar o processo me-todológico e os resultados do capítulo de recomendações de AF para idosos. O Grupo de Trabalho Idosos (GT Idosos) contou com a participação de 11 pesquisadores/profissionais que realizaram reuniões virtuais semanais, revisão sistemática de revisões, que incluiu 50 artigos ao final, e escutas com profissionais de Educação Física (n = 143), gestores (n = 17) e com idosos (n = 22), de todas as regiões do país, por meio de entrevistas telefônicas e formulários eletrônicos. Baseado nos resultados da revisão e das escutas, elaborou-se uma primeira versão das recomendações de AF para idosos, que foi submetida à consulta pública. No total foram recebidas 46 sugestões válidas, das quais 34 foram aceitas e incorporadas ao texto final por possuírem relevância técnica e/ou social. Como resultados, o Guia destaca os principais benefícios da AF para idosos, como melhora dos aspectos físicos, mentais e sociais, e recomenda um mínimo de 150 minutos por semana de AF de intensidade moderada, ou 75 minutos de intensidade vigorosa, considerando as AF no tempo livre, no deslocamento, no trabalho/estudo ou nas tarefas domésticas. Acredita-se que o Guia auxiliará os idosos e profissionais de saúde a conhecerem os benefícios da AF, a quantidade recomendada e as diversas possibilidades de prática, por meio de mensagens e exemplos culturalmente apropriados

At the Ministry of Health initiative, in collaboration with national researchers, the first Physical Activity (PA) Guidelines for the Brazilian Population was prepared, including recommendations for the various stages of life and special populations. This study aims to present the methodological process of the chapter on PA recommendations for the elderly. The Elderly Work Group had 11 researchers/professionals who held weekly virtual meetings, made a systematic review of reviews, which included 50 articles, and promoted a listening among elderly (n = 22), managers (n = 17) and professionals (n = 143) from all country regions, through telephone interviews and online forms. Based on the review and the listening results, a first version of the PA Guidelines for the elderly was elaborated, which was submitted to public consultation. Forty-six valid suggestions were received for the Guide's writing, of which 34 were accepted and incorporated into the final text since they had technical and/or social relevance. As results, the Guidelines highlight the major benefits of PA for the elderly, such as enhancement of the physical, mental and social aspects, and recommends a minimum of 150 minutes of moderate PA or 75 minutes of vigorous PA per week, considering PA in leisure time, commuting and domestic activities, as well as in work/study time. It is believed that these Guidelines will help the elderly and health professionals to get to know the benefits of PA, the recommended amount, and the different possibilities of practice through culturally appropriate messages and examples. Politically, it will reinforce the central role of PA in the prevention and control of chronic non-communicable diseases, boosting actions for its dissemination and implantation

Dietary recommendations during the COVID-19 pandemic.

Optimal nutrition can improve well-being and might mitigate the risk and morbidity associated with coronavirus disease 2019 (COVID-19), caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This review summarizes nutritional guidelines to support dietary counseling provided by dietitians and health-related professionals. The majority of documents encouraged the consumption of fruits, vegetables, and whole grain foods. Thirty-one percent of the guidelines highlighted the importance of minerals and vitamins such as zinc and vitamins C, A, and D to maintain a well-functioning immune system. Dietary supplementation has not been linked to COVID-19 prevention. However, supplementation with vitamins C and D, as well as with zinc and selenium, was highlighted as potentially beneficial for individuals with, or at risk of, respiratory viral infections or for those in whom nutrient deficiency is detected. There was no convincing evidence that food or food packaging is associated with the transmission of COVID-19, but good hygiene practices for handling and preparing foods were recommended. No changes to breastfeeding recommendations have been made, even in women diagnosed with COVID-19.

High-Protein Diet Associated with Bocaiuva Supplementation Decreases Body Fat and Improves Glucose Tolerance in Resistance-Trained Rats.

High-protein diets (HPDs) are widely used for health and performance. However, the combination of whey protein and natural foods (i.e., fruits) is still unclear. Thus, we evaluated the role of supplemental HPD with Bocaiuva (Acrocomia sp.) in metabolic and body composition parameters of rats submitted to resistance training (RT). Wistar rats (203.3 ± 30 g) were randomly allocated to five groups: normoproteic control (CON, n = 5), sedentary high-protein (SH, n = 5), RT + H (trained high-protein [TH], n = 5), sedentary+Bocaiuva (SH+B, n = 4), and RT+Bocaiuva (TH+B, n = 4) diet groups. After 12 weeks of RT, the maximal strength increased in both trained groups (P < .05). The TH + B group had lower values of adiposity index (AI) (3.8 ± 0.7% vs. 6.8 ± 1.3%) and visceral fat (0.038 ± 0.004 g/g vs. 0.067 ± 0.012 g/g) compared with the SH group, respectively (P < .05). The other groups did not show differences in values of AI (CON, 5.4 ± 1.6%, TH, 5.4 ± 1.3%, and SH+B, 5.5 ± 1.2%). In addition, the fasting glucose of trained groups (TH, 106.0 ± 4.5, and TH+B, 100.4 ± 13.5 dL/mg) was significantly lower when compared with controls (SH, 120.0 ± 14.4, and SH+B, 119 ± 6.4 dL/mg) (P < .05). Bocaiuva combined with an HPD reduced visceral fat and AI in addition to improving glucose tolerance of rats submitted to RT.

Development of a Food Frequency Questionnaire for Brazilian athletes.

AIM: Until recently most dietary survey methods have been developed for non-athletic populations. In this study, we aimed to develop a Food Frequency Questionnaire (FFQ) to assess the regular dietary intake of Brazilian athletes. METHODS: We interviewed 141 athletes (23.36 ± 7.77 years old) for their dietary intake using 24-hour recalls. After grouping conceptually similar food items into 113 food items, percentage contribution analysis and stepwise regression models were used to highlight foods contributing to at least 90% of the between-person variability of key nutrients. RESULTS: The developed FFQ contained 59 foods which were important predictors of the variance in nutrient intake. Vitamin C and pyridoxine had the lowest number of selected foods. Conversely, 13 food items were required to explain the between-person variation for energy, carbohydrate and magnesium intake. CONCLUSIONS: Using a multiple regression analysis we developed a 59-food item questionnaire, which includes culturally specific food items and may represent an important dietary tool to analyse athletic populations. Reproducibility and validity of this FFQ will be verified in future research.

Consumption of meat, eggs and dairy products is associated with aerobic and anaerobic performance in Brazilian athletes - A cross-sectional study / El consumo de carne, huevos y productos lácteos se asocia al rendimiento aeróbico y anaeróbico en los deportistas brasileños: un estudio transversal

Objective: to associate food consumption according to the groups that make up the food pyramid with the aerobic and anaerobic performance of Brazilian athletes. Method: a cross-sectional study of 168 athletes with a mean age and BMI of 20.84 ± 7.74 years and 22.88 ± 3.1 kg/m², respectively. Results: maximum power output was significantly associated with the meat and eggs groups (ß = 0.31; p < 0.05). VO2max exhibited a positive relationship with the fruit group (ß = 0.29; p < 0.05). A significant inverse relation between VO2max and the legumes group was observed (ß = -0.76; p < 0.05). The meat and eggs group and the dairy products group had an inverse and significant association with VO2max (ß = -0.43; p < 0.01). Conclusions: consumption of meat and eggs showed a positive association with anaerobic performance, whereas the same group and the dairy products group had a negative association with aerobic performance

Objectivo: asociar el consumo de alimentos según los grupos que componen la pirámide de alimentos con el rendimiento aeróbico y anaeróbico de deportistas brasileños. Método: estudio transversal de 168 deportistas con una media de edad e IMC de 20,84 ± 7,74 años y 22,88 ± 3,1 kg/m², respectivamente. Resultados: la potencia máxima se asoció significativamente con el consumo de los grupos de carne y huevos (ß = 0,31; p < 0,05). El VO2max mostró una relación positiva con el grupo de la fruta (ß = 0,29; p < 0,05). Se observó una relación inversa significativa entre el VO2max y el grupo de las leguminosas (ß = -0,76; p < 0,05). El grupo de carnes y huevos y el grupo de productos lácteos tuvieron una asociación inversa y significativa con el VO2max (ß = -0,43; p < 0,01). Conclusiones: el consumo de carne y huevos mostró una asociación positiva con el rendimiento anaeróbico, mientras que el mismo grupo y los productos lácteos se asociaron de forma negativa al rendimiento aeróbico

Consumption of meat, eggs and dairy products is associated with aerobic and anaerobic performance in Brazilian athletes - A cross-sectional study.

INTRODUCTION: To associate food consumption according to the groups that make up the food pyramid with the aerobic and anaerobic performance of Brazilian athletes. A cross-sectional study of 168 athletes with a mean age and BMI of 20.84 ± 7.74 years and 22.88 ± 3.1 kg/m², respectively. Maximum power output was significantly associated with the meat and eggs groups (ß = 0.31; p < 0.05). VO2max exhibited a positive relationship with the fruit group (ß = 0.29; p < 0.05). A significant inverse relation between VO2max and the legumes group was observed (ß = -0.76; p < 0.05). The meat and eggs group and the dairy products group had an inverse and significant association with VO2max (ß = -0.43; p < 0.01). Consumption of meat and eggs showed a positive association with anaerobic performance, whereas the same group and the dairy products group had a negative association with aerobic performance.

INTRODUCCIÓN: Asociar el consumo de alimentos según los grupos que componen la pirámide de alimentos con el rendimiento aeróbico y anaeróbico de deportistas brasileños. Estudio transversal de 168 deportistas con una media de edad e IMC de 20,84 ± 7,74 años y 22,88 ± 3,1 kg/m², respectivamente. La potencia máxima se asoció significativamente con el consumo de los grupos de carne y huevos (ß = 0,31; p < 0,05). El VO2max mostró una relación positiva con el grupo de la fruta (ß = 0,29; p < 0,05). Se observó una relación inversa significativa entre el VO2max y el grupo de las leguminosas (ß = −0,76; p < 0,05). El grupo de carnes y huevos y el grupo de productos lácteos tuvieron una asociación inversa y significativa con el VO2max (ß = −0,43; p < 0,01). El consumo de carne y huevos mostró una asociación positiva con el rendimiento anaeróbico, mientras que el mismo grupo y los productos lácteos se asociaron de forma negativa al rendimiento aeróbico.

Phase Angle is Moderately Associated with Short-term Maximal Intensity Efforts in Soccer Players.

This study examined the relationship between PhA and short-term maximal intensity efforts in soccer players, and was conducted in 99 male soccer players, ages 19-36 years. Bioelectrical impedance was used to assess body fat, fat free mass (FFM) and PhA (phase angle). Running Anaerobic Sprint Test (RAST) was used to evaluate physical performance. Food consumption was assessed through the 24-hour dietary recall method. Pearson correlation and multiple regressions were used for statistical analysis. Phase angle exhibited a positive relationship with maximum power (ß=0.66; P<0.001), even after adjustment for the co-variables FFM and body fat (ß=0.52; P=0.02). Phase angle was inversely related with fatigue index (ß=- 0.61; P=0.04), even after adjusting for FFM (ß=- 0.70; P=0.020). Our results indicated that independently of FFM and body fat, PhA was inversely associated with fatigue index and positively related with maximum power, revealing the PhA appeared as a valid predictor of fatigue.

Pre-season dietary intake of professional soccer players.

BACKGROUND: Despite the well-documented importance of nutrition in optimizing performance and health, the dietary intake of soccer players has attracted little attention. AIM: We aimed to assess the pre-season dietary intake of professional soccer players and its adequacy in macro and micronutrients. METHODS: The pre-season dietary intake of 19 male athletes was assessed using a semi-structured 3-day food record. To determine dietary adequacy and excess, energy and macronutrient intake were compared with the Brazilian dietary reference values for athletes, and micronutrients were compared with the Estimated Average Requirement - EAR (minimum recommendation) and Tolerable Upper Intake Level - UL (maximum recommendation). RESULTS: Mean daily energy intake (40.74±12.81 kcal/kg) was adequate. However, there was a low carbohydrate intake (5.44±1.86 g/kg/day) and a high amount of protein and fat (1.91±0.75 and 1.27±0.50 g/kg/day, respectively). Sodium intake (3141.77±939.76 mg/day) was higher than UL (2300 mg/day), while the majority of players showed daily intake of vitamin A (74%), vitamin D (100%), folate (58%), calcium and magnesium (68%) below the EAR (625, 10 and 320 µg/day, 800 and 330 mg/day, respectively). CONCLUSION: The dietary intake of professional soccer players was adequate in energy, but inadequate in macro and micronutrients, which suggests the need to improve nutritional practices to sustain the physical demands of soccer during pre-season.

Adequacy of energy and macronutrient intake of food supplements for athletes / Suplementos alimentares na adequação do consumo energético e de macronutrientes em atletas

ABSTRACT Objective To assess how much food supplements contribute to the nutritional adequacy of energy and macronutrients in relation those recommended for athletes. Methods This was a cross sectional study was composed of 182 athletes from 19 sports (150 men and 32 women) with a mean age, weight, height and body mass index of 23.8±7.5 years, 73.7±15.6kg, 1.7±0.1m, 24.2±4.0kg/m², respectively. The 24 hours dietary recall was applied to assess intake and the Multiple Source Method to evaluate usual intake. We used the t-test, Mann-Whitney test, Analysis of Variance and Kruskal-Wallis for comparative analysis among the diets, gender and types of groups, and the comparison of two-proportion test to assess the diets Food and Food and Supplementation. Results Of the athletes studied, less than half used dietary supplements (39.0%). Energy intake was below the recommended (52.7%) in Food diet, and 45.6% in Food and Supplementation diet. The mean total of carbohydrate inadequacy (g.kg-1.day-1) was high for athletes of both genders and between Food and Food and Supplementation diets. The protein intake was above the recommended levels in Food diet (23.1%) and in Food and Supplementation diet (33.5%). The lipid intake was also above the recommended dietary levels in Food (47.3%) and in Food and Supplementation diets (50.0%). Conclusion The use of supplements did not significantly reduce inadequacies of diet and the athletes' intake of calories and carbohydrates was below the recommended for these groups. However, the protein intake was above the recommended levels for athletes.

RESUMO Objetivo Avaliar a contribuição dos suplementos alimentares para a adequação nutricional de energia e macronutrientes em relação às recomendações propostas para atletas. Métodos Estudo transversal, composto por 182 atletas de 19 modalidades esportivas (150 homens e 32 mulheres), com média de idade, peso, altura e índice de massa corporal de 23,8±7,5 anos, 73,7±15,6kg, 1,7±0,1m, 24,2±4,0kg/m², respectivamente. Foi aplicado recordatório de 24 horas para avaliação do consumo e o Multiple Source Method para avaliação do consumo usual. Foram usados: teste-t, Mann-Whitney, Analises de Variância e Kruskal-Wallis para análise de comparação entre as dietas, por gênero e grupos de modalidades, e teste de comparação entre duas proporções para avaliar as dietas Alimentos e Alimentos e Suplementos. Resultados Menos da metade fazia uso de suplementos alimentares (39,0%). O consumo energético esteve abaixo do recomendado em 52,7% na dieta Alimentos, e 45,6% na dieta Alimentos e Suplementos. A inadequação de carboidrato (g.kg-1.dia-1) foi alta na média total de atletas, para gêneros e entre modalidades nas dietas Alimentos e Alimentos e Suplementos. O consumo proteico esteve acima do recomendado em 23,1% na dieta Alimentos e 33,5% na dieta Alimentos e Suplementos. Já para lipídeos a ingestão esteve acima do recomendado 47,3% na dieta Alimentos e 50,0% na dieta Alimentos e Suplementos. Conclusão O uso de suplementos não auxiliou na diminuição das inadequações de forma expressiva, permanecendo os atletas abaixo das recomendações preconizadas para calorias e glicídios, porém aumentou a quantidade de atletas acima da recomendação de proteína.

Use of dietary supplements among Brazilian athletes / Uso de suplementos alimentares entre atletas brasileiro

ABSTRACT Objective: To investigate the prevalence and establish the profile of the consumption of dietary supplements among Brazilian athletes. Methods: A total of 182 athletes of both genders from 20 different sports participated in this study. The athletes answered a questionnaire containing sociodemographic and sports-related questions and were interviewed about the consumption of dietary supplements. Results: Forty seven percent of athletes reported having consumed at least one type of dietary supplement and 38% said they use more than three different types of supplements concurrently. Whey protein was the most commonly consumed supplement, and the most frequently mentioned reason for its consumption was performance improvement. The main source of information was coaches, and individual sport athletes were the greatest consumers and the most likely to seek dietary supplement. Conclusion: Approximately half of the participants used dietary supplements, which on most occasions were recommended by coaches. The consumption profile also revealed multiple supplementation practice and showed that nutrition education is essential for this specific population.

RESUMO Objetivo: Descrever a prevalência e o perfil de ingestão de suplementos alimentares entre atletas brasileiros. Métodos: Participaram do estudo 182 atletas de ambos os sexos de 20 diferentes modalidades esportivas. Os atletas responderam a um questionário contendo informações sociodemográficas e esportivas e foram entrevistados quanto ao consumo de suplementos. Resultados: Quarenta e sete porcento dos atletas relataram ter consumido pelo menos um tipo de suplemento e 38% utilizavam mais de três tipos de suplementos concomitantemente. O suplemento mais consumido foi o whey protein e a razão mais citada para o consumo foi a melhora no desempenho físico. A maior fonte de informação foi o treinador, sendo os atletas de modalidades individuais os maiores consumidores e também os mais propensos a buscarem essa fonte. Conclusão: Quase metade da amostra fazia uso de suplementos, os quais eram indicados, predominantemente, pelos treinadores. O perfil de consumo também revelou a prática da poli suplementação e mostra que a educação nutricional é essencial para essa população específica.

Application of the Rosetta Stone to understand how much MVPA preschoolers accumulate: A systematic review.

OBJECTIVES: This study illustrates the utility of the Rosetta Stone equations for comparing estimates of preschool-age children's moderate-to-vigorous physical activity (MVPA) across studies utilizing different cutpoints. DESIGN: Systematic review. METHODS: A search of online databases was conducted to identify studies that reported daily minutes of MVPA in preschoolers using the cutpoints from which Rosetta Stone equations have been developed. Mean MVPA minday-1 from each study and the transformed estimate using the Rosetta Stone equations were compared across 7 sets of cutpoints. The weighted mean was used to calculate absolute differences between the MVPA estimates of studies using the same cutpoints (e.g all studies that have used Pate cutpoint), and from all of the remaining studies using different cutpoints (e.g., all remaining studies that have not used Pate cutpoint), before and after the Rosetta Stone transformation. RESULTS: A total of 33 manuscripts met the eligibility criteria and reported MVPA for 12,178 preschoolers (50% girls). The mean MVPA for the total sample ranged from 21.1 (Puyau cutpoint) to 288.6 (Freedson cutpoints) minday-1. The difference between studies using the same cutpoint and estimates from remaining studies using different cutpoints was 82.4 and 80.0minday-1 for boys and girls, respectively. These differences were reduced to approximately 14minday-1 for boys and girls, after Rosetta Stone transformations. CONCLUSIONS: The Rosetta Stone equations substantially reduced the differences across studies that utilize different cutpoints and improved the ability to interpret findings across studies. Future equations should be developed for sedentary and total physical activity, as well as, comparisons across different devices and placements.

[Adolescent health risk behaviors and Family Health Strategy educational activities in Cuiabá, Mato Grosso State, Brazil, 2011]. / Comportamentos de risco à saúde de adolescentes e atividades educativas da Estratégia Saúde da Família em Cuiabá, Mato Grosso, 2011.

OBJECTIVE: to analyze health risk behaviors in adolescents and Family Health Strategy (FHS) educational activities in Cuiabá, Mato Grosso State, Brazil. METHODS: a cross-sectional study was conducted using data from a survey with adolescents registered with FHS in 2011/2012; Poisson regression was used to estimate prevalence ratios (PR) and 95% confidence interval (CI95%). RESULTS: there was low participation in educational activities on alcohol (23%), food (10%) and physical activity (9%); insufficient physical activity was higher in girls (PR=0.76 - 95%CI 0.68;0.85), alcohol consumption was associated with the 15-19 age range (PR=1.48 - 95%CI 1.29;1.71) and low fruit and vegetable intake was associated with income of ≤2 minimum wages (PR=1.17 - 95%CI 1.02;1.33). CONCLUSION: there was no significant association between adolescent risk behaviors and their participation in FHS educational activities.