Dans les pays occidentaux, la consommation de protéines animales, majoritaire, diminue depuis une décennie. Elle est, dans la majorité des cas, associée négativement à différents paramètres de durabilité, et les études modélisant des régimes durables ont montré que les différents paramètres n’étaient pas toujours compatibles. Des régimes améliorant largement différents paramètres de durabilité ont été modélisés, mais la prise en compte de l’acceptabilité culturelle est insuffisante et nécessite des approfondissements. L’objectif de cette thèse était de modéliser des trajectoires acceptables de réarrangement de la consommation de sources protéiques pour augmenter l’adéquation nutritionnelle et d’en évaluer les impacts sur la durabilité. L’étude des consommations de sources de protéines en France a permis de conclure que les apports en protéines sont adéquats pour l’ensemble de la population, mais qu’il existe différents profils de consommation protéique, caractérisés par des niveaux de sécurité nutritionnelle différents. Une étude réalisée en 2018 a permis d’établir que les niveaux de consommation de viande étaient prédits par les attitudes, les normes sociales, et l’auto-efficacité perçue vis-à-vis de la réduction de la consommation de viande. Pour les travaux de modélisation pas-à-pas de l’alimentation, il a été considéré acceptable pour un individu de consommer un nouvel aliment, si celui-ci était largement consommé par des individus au profil de consommation protéique similaire. Cette hypothèse a été validée par une enquête en 2018. Les travaux de modélisation ont permis d’identifier que certaines recommandations alimentaires étaient efficaces pour l’ensemble de la population, mais que d’autres étaient spécifiques à certains profils de consommation protéique, caractérisés par des profils nutritionnels et des répertoires alimentaires spécifiques. Enfin, des modèles ont permis d’identifier que viser systématiquement plus de protéines végétales lors des premières modifications diététiques permet, malgré une adéquation nutritionnelle légèrement plus faible, d’obtenir de meilleurs paramètres de durabilité. / In Western countries, the consumption of animal protein, which is the predominant protein source, has been decreasing over the last decade. This consumption has been negatively associated with different sustainability parameters in the majority of cases, and studies modelling sustainable diets have shown that the different parameters are not always compatible. Diets that significantly improve different sustainability parameters have been modelled, but the consideration of cultural acceptability is insufficient and requires further investigation. The objective of this thesis was to model acceptable trajectories of rearrangement of protein source consumption to increase nutritional adequacy and to evaluate its impacts on sustainability. The study of protein source consumption in France led to the conclusion that protein intake is adequate for the entire population, but that there are different profiles of protein intake characterized by different levels of nutritional security. A study conducted in 2018 found that meat consumption levels were predicted by attitudes, social norms, and perceived behavioral control related to the reduction of meat consumption. For the stepwise dietary modelling study, it was considered acceptable for an individual to consume a new food if it was widely consumed by individuals with a similar profile of protein intake. This hypothesis was validated by a survey conducted in 2018. The modelling work identified that some dietary recommendations were effective for the general population, but others were specific to certain profiles of protein intake characterized by specific nutritional profiles and food repertoires. Finally, models have identified that systematically targeting more plant proteins during the first dietary modifications allows, despite a slightly lower nutritional adequacy, to obtain better sustainability parameters.

Twenty-two young men and women of the 49thMilitary Police Brigade of the California National Guard were participants of our nutrition education and health assessment program. The California National Guard has expressed concern of unsatisfactory physical and nutritional status of their personnel related to a nutrition knowledge deficit as evidenced by preliminary data of insufficient dietary intake and poor nutrition knowledge assessment scores. Our program was designed to implement a nutrition intervention including education and evaluate its effectiveness in reducing Metabolic Syndrome (MetS) risk factors, improving body composition, and providing educational lessons intended to alter lifestyle. Baseline data was quantified and analyzed for statistical significance. Participants reported consuming less than average daily recommended calories and variable macronutrient % of recommended values (%Recommended). DXA analysis revealed high %Body Fat (BF), positively correlated with high values of Visceral Adipose Tissue (VAT) in both sexes. Statistical analyses identify HDL cholesterol (HDL-C) and waist circumference as significant predictive variables of VAT, after adjusting for age and sex. Follow-up data from two participants was collected but excluded from statistical analysis due to small sample size. Exploratory (stepwise regression) analysis considering several predictive variables reveals HDL-C is the most significant predictor of VAT (p=0.0011), when waist circumference is excluded from the model, after correcting for age and sex. Waist circumference was excluded with the consideration that waist may be a surrogate measure for VAT. HDL-C seems to be the variable most strongly associated with VAT and HDL-C explains 67% of the variability of VAT (RSquared=0.6741) in the fit model after correcting for age and sex. While the impact of high HDL-C on improved body composition and reduction of cardiometabolic risk factors is well supported by literature, the significance of HDL-C on VAT deposition presented in our findings provokes continued research.

The childhood obesity epidemic has become a serious global public health problem. Children are different from adults and need special attention and effort in helping them to maintain healthy lifestyle and optimal body weight. Childhood and adolescence are two critical periods for developing lifelong healthy habits. This article discusses childhood obesity-related issues in five sections: (1) classification of childhood obesity; (2) worldwide childhood obesity epidemic; (3) risk factors (predictors) of childhood obesity; (4) health consequences of childhood obesity; and (5) prevention of childhood obesity.

The purpose of this study was to describe a sample of insulin-dependent diabetic youth in terms of selected anthropometric measurements, level of metabolic control and dietary intake. The 22 subjects (10 males and 12 females) were between the ages of seven to 16 years and, except for one female, regularly attended a multidisciplinary outpatient diabetes clinic. The study involved cross-sectional observation of height, weight, triceps and subscapular skinfold measurements, mid-arm muscle circumference and weight:height ratios, and comparison of these measurements to national norms derived from non-diabetic controls. Levels of metabolic control were observed using glycosylated hemoglobin values, and examined for effect on anthropometric parameters. It was found that the group generally fell within normal distribution patterns for all growth parameters when compared to control data. Level of metabolic control, duration of diabetes and age at onset of disease had no significant effect on the anthropometric parameters studied. Duration of diabetes had no effect on level of metabolic control. The study group consumed most nutrients in amounts consistent with the 1980 Recommended Dietary Allowances, with the exception of vitamin B6 , folacin, iron and zinc. Consumption of total fat, saturated fat and cholesterol were in excess of the current recommendations for diet in diabetes, and proportion of total energy from carbohydrate tended to be lower than recommended. Mean intakes of vitamins A, C, B 6 and s12 , thiamin, riboflavin, niacin, calcium, phosphorous, iron, magnesium and protein appeared to be higher than mean intakes of the same nutrients reported from the Nationwide Food Consumption Survey (1977-78) and the Second National Health and Nutrition Examination Survey (1976-80) for corresponding age groups. It was suggested that since young diabetic individuals usually have close supervision of their dietary intake, their intakes are somewhat superior nutritionally than those of non-diabetic individuals. The study sample reported use of a number of special dietetic foods other than dietetic soda and sucrose-substitutes. Foods used for treatment of hypoglycemic reactions included candy, fruit and juices, regular pop, frosting and special glucose preparations designed specifically for use with insulin-dependent diabetes.

To date there have been no complete reports of the nutrient intakes of persons with Type I diabetes mellitus who use continuous subcutaneous insulin infusion (CSII) pumps. The purpose of this study was to describe the sample population and to determine the nutrient intake of adult Type I diabetics from the Salt Lake City, Utah area, who use CSII. Seven male and 15 female CSII users, ages 25 to 53, completed a questionnaire and a three-day diet record as instructed. Diet records were coded and household measurements of foods were converted to gram weights for computerized nutrient analysis. Nutrient intake is reported as group mean and standard deviation for sex and age. The average duration of diabetes was 17 years. The average length of CSII use was l.6 years. Review of the medical charts revealed that weight gain since beginning CSII averaged 5.5 pounds irrespective of the duration of pump use. The dietary intake of protein, calcium, phosphorus, vitamin A, thiamin, riboflavin, niacin, vitamin B12 , and ascorbic acid met or exceeded the Recommended Dietary Allowances (RDA) for both men and women. For males, mean nutrient intakes were below the RDA for zinc (82.7%), folate (82.2%), and vitamin 86 (69.0%). For females, intakes were also below the RDA for zinc (64.0%), folate (58.3%), and vitamin 86 (69.0%), as well as for iron (58.5%) and magnesium (88.0%). The average percent of kilocalories from protein, carbohydrate and fat, (approximately 17%, 43%, and 40%) was similar for both the males and females. The day-to-day variation in carbohydrate intake for both sexes was not significantly different. Intake of added sugar in the diet was 6.6% and 5.8% of total kilocalories (14.8% and 13.9% of the carbohydrate kilocalories) for males and females, respectively. In conclusion, dietary intake for this small group of CSII users was adequate in most nutrients . Of concern is the apparent inadequate intakes of zinc, folate, vitamin s6 and iron for women, as compared to the current RDA standards. The distribution of kilocalories from protein, carbohydrate and fat approaches the 1979 recommendations by the American Diabetes Association. Weight gain may be a problem for some CSII pump users, and should be monitored.

Thirty-two non-anemic children were assessed clinically, biochemically and anthropometrically at six months, one year and two years of age to investigate the relationship of iron status to mental and motor development. Using dietary history and dietary record instruments, dietary iron was estimated and compared to the National Food Consumption Survey (1985) and the Recommended Dietary Allowances (RDA) for corresponding age groups. The Bayley Scales of Infant Development (which assess mental and motor development) and the Caldwell Home Inventory (which evaluates the environmental stimuli) were performed and correlated with blood iron parameters, anthropometric measurements and dietary nutrient intakes. Nutrient intakes of these children were similar to those reported in the NFCS (1985) for one- and two-year-olds. Iron intake decreased from 13.2 mg iron daily (88% RDA) at six months to 10.3 mg iron daily (68% RDA) and 7.4 mg iron daily (49% RDA) at two years of age. The correlation between iron intake and development was not statistically significant at any age. Stepwise, multiple regression was employed to investigate the extent to which variation in mental and motor development was explained by dietary variables, blood iron parameters and anthropometric measurements. Hematocrit was the only variable that significantly explained variation in mental development at all three ages. The findings of this study were different from earlier studies in that there was no statistical correlation between iron status and mental development; but, it did confirm the conclusion of more recent experiments that iron status has little effect on infants' and toddlers' development. The finding that infants and toddlers consuming less than the RDA for iron do not display iron deficiency symptoms and were not developmentally delayed or compromised should be comforting to parents who are concerned about iron intake during this critical period of infants' brain growth.

No description available.

Underweight and stunting are highly prevalent public health problems in developing countries, particularly among populations exposed to food insecurity and chronic malnutrition. Underweight results from relatively recent malnutrition whereas empirical research has shown that early childhood malnutrition is a strong predictor of stunting. Dietary diversity has been recognized as an indicator of food security, with consumption of more food groups suggesting better nourishment. Greater dietary diversity has been associated with better nutritional outcomes and improved micronutrient intake. Zinc, an essential mineral, plays a critical role in child growth and development. A deficiency in Zinc may contribute to increased risk for stunting in childhood and adolescence. This cross-sectional study examined the independent associations between underweight, stunting, dietary diversity, and dietary intake of zinc among a sample of never-married adolescent girls (n=307) living in Kilosa District, Tanzania. Dietary, anthropometric, physical activity, morbidity and demographic data were collected. The associations between underweight (determined as weight by age less than 5th percentile of WHO reference) and dietary diversity (defined by the number of food groups consumed by adolescent girls); as well as stunting (determined as height by age less than 3rd percentile of WHO reference) and dietary intake of zinc were tested using multivariate analyses. We found that adolescent girls’ diets were largely deficient in macronutrients and micronutrients, with the mean intake of energy and protein being 810kcals/d and 21.9g/d, respectively. The rates of underweight and stunting were 16.2% and 62.2%, respectively. Greater dietary diversity was associated with decreased risk of underweight among adolescent girls, after adjusting for confounders including age, village location, school enrollment, pubertal status, socioeconomic status and energy intake, (OR, 0.55, 95%CI 0.39-0.98, p<0.05). Similarly, higher intake of zinc was found to be associated with lower risk of stunting, after controlling for age, physical activity, BMI, energy intake and individual’s dietary diversity (OR, 0.87; 95%CI, 0.76-0.99, p<0.05). In conclusion, these findings suggest that dietary diversity and nutrient intake, especially intake of zinc, may play an important role in the long-term nutritional health of adolescent girls. Longitudinal studies examining these associations in developing countries settings are needed.

Objective: To determine the relationship between body mass index (BMI) and soft drink consumption among adolescents. It is hypothesized that soft drink consumption contributes to overweight and obesity among adolescents. Background: Research examining the relationship between body mass index and soft drink consumption is inconsistent. Several studies have found a negative association between total sugar intake and BMI; however, others have found a link between sugar-sweetened drinks and obesity. There are no known studies that have controlled for physical activity. Data and Methods: Data on approximately 225 adolescents were used. Frequency of soft drink consumption, type of milk, and calcium intake were assessed using the Youth and Adolescent Questionnaire (YAQ). Body Mass Index was calculated from height and weight measurements and adjusted for age. Physical activity levels were assessed using data recorded from the My Life Stepper 2515 digital pedometer. Age, birthday, grade, sex, and ethnicity were reported on the consent form. Results: When treated as a categorical variable, soft drink consumption was a marginal predictor of adjusted BMI (p = 0.0802). The relationship between soft drink consumption and adjusted BMI is not linear and does not follow a monotonic trend. Other variables found to significantly influence BMI were type of milk, total step mean, and calcium. Discussion and Conclusions: The results of this study conclude that soft drink consumption is related to BMI among adolescents. This relationship is marginally significant; it is significant at the 0.10 level but not at the 0.05 level. Those who were in the highest soft drink consumption category had a higher mean BMI than those in the other soft drink consumption categories. Soft drink consumption, type of milk, total step mean, and calcium together predict about 10% of the variability in BMI.

The objective of this study was to investigate the extent to which risk of gaining weight or body fat is affected by emotional health in women. A secondary objective was to determine the influence of age, baseline weight and body fat, physical activity (PA), energy intake, and changes in PA and energy intake, on the relationship between emotional health and gains in weight and body fat. The study was a prospective cohort investigation over 20 months of 256 healthy, non-obese females (age: 35-45 y, BMI < 30 kg/m2). All subjects were assessed for several variables using objective measurements at baseline and again at 20 months. Emotional health was assessed using the General Well-Being Schedule. Body fat percentage was indexed using the Bod Pod. PA was measured objectively using MTI (CSA) accelerometers, and energy intake was measured using weighed, 7-day food records. The results of the study demonstrated that risk of gains in weight and body fat were no greater in depressed women compared to their counterparts. However, 171 (66.8%) subjects demonstrated less than positive (LTP) emotional health at baseline, and 37.4% of these subjects gained weight during the 20-month study. Conversely, 85 (33.2%) subjects had positive emotional health at baseline, but only 23.5% gained weight over the investigational period. With no variables controlled, women with LTP emotional health had 59% greater risk of weight gain over the study period than women with positive emotional health (RR 1.59, 95% CI = 1.04-2.44). Women with LTP emotional health were at no greater risk of gains in body fat percentage than women with positive emotional health (RR 0.96, 95% CI = 0.70-1.33). After adjusting for each potential confounder individually, risk of gaining weight or body fat did not change. However, after adjusting for all of the potential confounders simultaneously, risk of weight gain was weakened (RR 1.43, 95% CI = 0.93-2.21). These results seem to demonstrate that middle-aged women with LTP emotional health may be at increased risk of gaining weight compared to women with positive emotional health.