Adolescents' lack of motivation and competence to cook may hinder consumption of a healthy di... more Adolescents' lack of motivation and competence to cook may hinder consumption of a healthy diet; however, tools to estimate these behaviors are lacking. A survey to determine adolescents' intrinsic...
59 Using Technology to Assess gain in Nutrition Knowledge among the Youth Heli Roy 4-H Youth and ... more 59 Using Technology to Assess gain in Nutrition Knowledge among the Youth Heli Roy 4-H Youth and Family Development Pennington ... This classroom communication system allows interaction among the students and the teacher in the educational setting (Beatty, 2004). ...
Body Mass Index (BMI) is a way to define overweight and obesity. The index is a mathematical form... more Body Mass Index (BMI) is a way to define overweight and obesity. The index is a mathematical formula in which a person’s body weight in kilograms is divided by the square of his or her height in meters [kg/m2]. The BMI is more highly correlated with body fat than any other mathematical ratio of height and weight; however, athletes and individuals with a high percentage of muscle may have a BMI in the overweight range because of the higher density of muscle compared to fat.
We have developed an eXtension Community of Practice (CoP) focused on blueberry production and co... more We have developed an eXtension Community of Practice (CoP) focused on blueberry production and consumption. The “All about Blueberries” Community of Practice is adapting the best existing extension publications and developing new research-based extension recommendations related to blueberry production and consumption. Our primary goal is to increase blueberry productivity and consumption of blueberries, initially in the southeast and now nationwide. Our CoP is using a variety of educational approaches including video, audio podcasts, photo galleries, interactive-training modules (Moodle), and social networking tools (i.e. Facebook, twitter, and blogs) to educate our audience. Our Community of Interest is broadly defined as producers (commercial and backyard), distributors, and consumers of blueberries (youth and adult). We are working cooperatively to develop content in the following topic areas: “The Blueberry”, “Consumers”, and “4-H/Youth”. The experts that are members of our CoP ...
The “All about Blueberries” Community of Practice is adapting the best existing extension publica... more The “All about Blueberries” Community of Practice is adapting the best existing extension publications and developing new research-based extension recommendations related to blueberry production and consumption. Our primary goal is to increase blueberry productivity and consumption of blueberries, initially in the southeast and then nationwide. The experts that are members of our Community of Practice are located in the southeastern
ABSTRACT Blueberry producers in many southeastern states are increasing production at a rapid rat... more ABSTRACT Blueberry producers in many southeastern states are increasing production at a rapid rate. This has been driven by increasing consumer demand for blueberries due to their anti-oxidant, anti-aging properties and superior nutritional quality. Extension support is needed to guide growers in methods to maximize productivity and decrease production costs. There is also a need to connect blueberry producers with local markets. To meet this need, research and extension faculty from across the southeast have joined together to cooperatively build the "All about Blueberries" Community of Practice, which will be hosted by www.extension.org. Our goals for the newly-formed CoP include using novel, diverse educational methods to help our Community of Interest (CoI) increase blueberry production efficiency and correspondingly increase consumption of blueberries in the southeastern United States. Our CoI is broadly defined as producers (commercial and backyard), distributors, and consumers of blueberries (youth and adult). Our initial focus is southeastern blueberry producers and consumers. Over time, this CoP will be expanded to include grower support materials for blueberry growers throughout the United States. Consumer needs do not vary regionally, so consumer content will be applicable nationwide. The All About Blueberries CoP is comprised of Extension researchers/specialists from Louisiana State University AgCenter, Mississippi State University, Auburn University, USDA-ARS, and North Carolina State University who will are creating educational material for the eXtension CoP. An advisory committee has been established that includes blueberry producers, farmers’ market representatives, county agents, Extension specialists, scientists (USDA & University), and master gardeners from across the Southeastern United States. We are currently looking for experts from across the US to help expand our content. This presentation will introduce you to our team of experts and discuss the plans for future expansion of our CoP.
It takes several days to adapt to a high-fat diet. In an earlier study, we observed a large degre... more It takes several days to adapt to a high-fat diet. In an earlier study, we observed a large degree of interindividual variation in the capacity to adapt to a high-fat diet. We hypothesized that concurrent physical activity would accelerate fat oxidation during an isoenergetic high-fat diet. The objective of this study was to determine the effect of increased physical activity on the ability of young healthy men to increase fat oxidation during the shift to a high-fat diet. Six young healthy men participated in a randomized, single-blind crossover study. The volunteers consumed a diet contributing 37% of energy as fat, 14% as protein, and 49% as carbohydrate for 4 d. Energy expenditure and macronutrient balance were then measured in a respiration chamber as the energy content of the isoenergetic diet was changed to 50% fat, 14% protein, and 36% carbohydrate. Treadmill walking, as the physical activity, was used to increase total daily energy expenditure to 1.8 times the resting metab...
Dietary fat contents are highly variable. Failure to compensate for the positive fat balance that... more Dietary fat contents are highly variable. Failure to compensate for the positive fat balance that occurs during the shift to a high-fat, low-carbohydrate diet by increasing energy expenditure or by decreasing food intake may result in the gain of fat mass. The objective of this study was to investigate the time course of fat oxidation during adaptation to an isoenergetic high-fat, low-carbohydrate diet. After a 5-d control diet, dietary fat was increased from 37% of energy to 50% of energy for 4 d in 6 healthy, young lean men. Respiratory quotient and substrate macronutrient oxidation and balance were measured in a respiratory chamber. Fasting concentrations of insulin, glucose, and triacylglycerol; maximal oxygen consumption (f1.gif" BORDER="0">O(2)max) during treadmill exercise; and free-living energy expenditure were determined. Body fat was measured by dual-energy X-ray absorptiometry and visceral adipose tissue by computerized tomography. Compared with the bas...
The goal of the recently developed eXtension “All about Blueberries” Community of Practice (CoP) ... more The goal of the recently developed eXtension “All about Blueberries” Community of Practice (CoP) website is to encourage blueberry production and consumption in the United States. The website engages a wide range of audiences, called the Community of Interest (CoI), including growers (commercial and backyard), blueberry consumers, and 4-H/Youth who want to learn about blueberries. A team of researchers and extension specialists are collaborating to develop content for our multi-faceted constituents in order to empower our CoI to make educated decisions that benefit their well-being and improve their quality of life. Project content areas include: “Blueberry Production”, “Consumers”, and “4-H/Youth”. Horticulture experts from multiple states are focusing their effort on developing credible, research-based, up-to-date information and sophisticated online tools and solutions for the “Blueberry Production” section of the website, which commercial blueberry producers can implement in the...
The Journal of the Louisiana State Medical Society : official organ of the Louisiana State Medical Society, 2005
Obesity is an end result of the intricate interactions of biology, behavior, and environment. Rec... more Obesity is an end result of the intricate interactions of biology, behavior, and environment. Recent hypotheses in the scientific community suggest the current obesity epidemic is being driven largely by environmental factors (e.g., high energy/high fat foods, fast food consumption, television watching, "super-sized" portions, etc.) rather than biological ones. Individuals are bombarded with images and offers of high fat, high calorie, highly palatable, convenient, and inexpensive foods. These foods are packaged in portion sizes that far exceed federal recommendations. Furthermore, the physical demands of our society have changed resulting in an imbalance in energy intake and expenditure. Today's stressful lifestyles compound the effects of environmental factors by impairing weight loss efforts and by promoting fat storage. Combating the obesity epidemic demands environmental and social policy changes, particularly in the areas of portion size, availability of healthfu...
International journal of obesity and related metabolic disorders : journal of the International Association for the Study of Obesity, 2001
In studies that involve the use of a room calorimeter, 24 h energy intake is often larger than 24... more In studies that involve the use of a room calorimeter, 24 h energy intake is often larger than 24 h energy expenditure (24 h EE) because of a decrease in activity energy expenditure due to the confined space. This positive energy balance can have large consequences for the interpretation of substrate balances. The objective of this study was to develop a method for predicting an individual's 24 h EE in a room calorimeter at both low (1.4xRMR) and high (1.8xRMR) levels of physical activity. Two methods are presented that predict an individual's 24 h EE in a metabolic chamber. The first method was based on three components: (1) a 30 min measurement of resting metabolic rate (RMR) using a ventilated hood system; (2) measurement of exercise energy expenditure during 10 min of treadmill walking; and (3) estimation of free-living energy expenditure using a tri-axial motion sensor. Using these measurements we calculated the amount of treadmill time needed for each individual in ord...
Changes in substrate oxidation with isoenergetic high-carbohydrate (HC) and high-fat (HF) diets i... more Changes in substrate oxidation with isoenergetic high-carbohydrate (HC) and high-fat (HF) diets in male nonathletic subjects, aerobically trained athletes, and weight-trained athletes were examined in a crossover study. A whole-room respiration chamber was used to measure 24-h energy expenditure (EE) and substrate oxidation with control, HC, or HF diets for 7 d. The nonathletic group had higher 24-h EE (P < 0.05), exercise EE (P < 0.03), and resting metabolic rate (P < 0.04) than did the aerobically trained athletes when these measurements were corrected for lean body mass. Fat oxidation was significantly correlated with lean body mass and diet. However, athletic status had no effect on substrate oxidation. Carbohydrate oxidation across groups increased acutely by 23% after 24 h of the HC diet (P < 0.0001). Carbohydrate balance increased significantly over time with the HC diet (P < 0.002) and decreased acutely after return to the control diet (P < 0.0001). With th...
Adolescents' lack of motivation and competence to cook may hinder consumption of a healthy di... more Adolescents' lack of motivation and competence to cook may hinder consumption of a healthy diet; however, tools to estimate these behaviors are lacking. A survey to determine adolescents' intrinsic...
59 Using Technology to Assess gain in Nutrition Knowledge among the Youth Heli Roy 4-H Youth and ... more 59 Using Technology to Assess gain in Nutrition Knowledge among the Youth Heli Roy 4-H Youth and Family Development Pennington ... This classroom communication system allows interaction among the students and the teacher in the educational setting (Beatty, 2004). ...
Body Mass Index (BMI) is a way to define overweight and obesity. The index is a mathematical form... more Body Mass Index (BMI) is a way to define overweight and obesity. The index is a mathematical formula in which a person’s body weight in kilograms is divided by the square of his or her height in meters [kg/m2]. The BMI is more highly correlated with body fat than any other mathematical ratio of height and weight; however, athletes and individuals with a high percentage of muscle may have a BMI in the overweight range because of the higher density of muscle compared to fat.
We have developed an eXtension Community of Practice (CoP) focused on blueberry production and co... more We have developed an eXtension Community of Practice (CoP) focused on blueberry production and consumption. The “All about Blueberries” Community of Practice is adapting the best existing extension publications and developing new research-based extension recommendations related to blueberry production and consumption. Our primary goal is to increase blueberry productivity and consumption of blueberries, initially in the southeast and now nationwide. Our CoP is using a variety of educational approaches including video, audio podcasts, photo galleries, interactive-training modules (Moodle), and social networking tools (i.e. Facebook, twitter, and blogs) to educate our audience. Our Community of Interest is broadly defined as producers (commercial and backyard), distributors, and consumers of blueberries (youth and adult). We are working cooperatively to develop content in the following topic areas: “The Blueberry”, “Consumers”, and “4-H/Youth”. The experts that are members of our CoP ...
The “All about Blueberries” Community of Practice is adapting the best existing extension publica... more The “All about Blueberries” Community of Practice is adapting the best existing extension publications and developing new research-based extension recommendations related to blueberry production and consumption. Our primary goal is to increase blueberry productivity and consumption of blueberries, initially in the southeast and then nationwide. The experts that are members of our Community of Practice are located in the southeastern
ABSTRACT Blueberry producers in many southeastern states are increasing production at a rapid rat... more ABSTRACT Blueberry producers in many southeastern states are increasing production at a rapid rate. This has been driven by increasing consumer demand for blueberries due to their anti-oxidant, anti-aging properties and superior nutritional quality. Extension support is needed to guide growers in methods to maximize productivity and decrease production costs. There is also a need to connect blueberry producers with local markets. To meet this need, research and extension faculty from across the southeast have joined together to cooperatively build the &quot;All about Blueberries&quot; Community of Practice, which will be hosted by www.extension.org. Our goals for the newly-formed CoP include using novel, diverse educational methods to help our Community of Interest (CoI) increase blueberry production efficiency and correspondingly increase consumption of blueberries in the southeastern United States. Our CoI is broadly defined as producers (commercial and backyard), distributors, and consumers of blueberries (youth and adult). Our initial focus is southeastern blueberry producers and consumers. Over time, this CoP will be expanded to include grower support materials for blueberry growers throughout the United States. Consumer needs do not vary regionally, so consumer content will be applicable nationwide. The All About Blueberries CoP is comprised of Extension researchers/specialists from Louisiana State University AgCenter, Mississippi State University, Auburn University, USDA-ARS, and North Carolina State University who will are creating educational material for the eXtension CoP. An advisory committee has been established that includes blueberry producers, farmers’ market representatives, county agents, Extension specialists, scientists (USDA &amp; University), and master gardeners from across the Southeastern United States. We are currently looking for experts from across the US to help expand our content. This presentation will introduce you to our team of experts and discuss the plans for future expansion of our CoP.
It takes several days to adapt to a high-fat diet. In an earlier study, we observed a large degre... more It takes several days to adapt to a high-fat diet. In an earlier study, we observed a large degree of interindividual variation in the capacity to adapt to a high-fat diet. We hypothesized that concurrent physical activity would accelerate fat oxidation during an isoenergetic high-fat diet. The objective of this study was to determine the effect of increased physical activity on the ability of young healthy men to increase fat oxidation during the shift to a high-fat diet. Six young healthy men participated in a randomized, single-blind crossover study. The volunteers consumed a diet contributing 37% of energy as fat, 14% as protein, and 49% as carbohydrate for 4 d. Energy expenditure and macronutrient balance were then measured in a respiration chamber as the energy content of the isoenergetic diet was changed to 50% fat, 14% protein, and 36% carbohydrate. Treadmill walking, as the physical activity, was used to increase total daily energy expenditure to 1.8 times the resting metab...
Dietary fat contents are highly variable. Failure to compensate for the positive fat balance that... more Dietary fat contents are highly variable. Failure to compensate for the positive fat balance that occurs during the shift to a high-fat, low-carbohydrate diet by increasing energy expenditure or by decreasing food intake may result in the gain of fat mass. The objective of this study was to investigate the time course of fat oxidation during adaptation to an isoenergetic high-fat, low-carbohydrate diet. After a 5-d control diet, dietary fat was increased from 37% of energy to 50% of energy for 4 d in 6 healthy, young lean men. Respiratory quotient and substrate macronutrient oxidation and balance were measured in a respiratory chamber. Fasting concentrations of insulin, glucose, and triacylglycerol; maximal oxygen consumption (f1.gif" BORDER="0">O(2)max) during treadmill exercise; and free-living energy expenditure were determined. Body fat was measured by dual-energy X-ray absorptiometry and visceral adipose tissue by computerized tomography. Compared with the bas...
The goal of the recently developed eXtension “All about Blueberries” Community of Practice (CoP) ... more The goal of the recently developed eXtension “All about Blueberries” Community of Practice (CoP) website is to encourage blueberry production and consumption in the United States. The website engages a wide range of audiences, called the Community of Interest (CoI), including growers (commercial and backyard), blueberry consumers, and 4-H/Youth who want to learn about blueberries. A team of researchers and extension specialists are collaborating to develop content for our multi-faceted constituents in order to empower our CoI to make educated decisions that benefit their well-being and improve their quality of life. Project content areas include: “Blueberry Production”, “Consumers”, and “4-H/Youth”. Horticulture experts from multiple states are focusing their effort on developing credible, research-based, up-to-date information and sophisticated online tools and solutions for the “Blueberry Production” section of the website, which commercial blueberry producers can implement in the...
The Journal of the Louisiana State Medical Society : official organ of the Louisiana State Medical Society, 2005
Obesity is an end result of the intricate interactions of biology, behavior, and environment. Rec... more Obesity is an end result of the intricate interactions of biology, behavior, and environment. Recent hypotheses in the scientific community suggest the current obesity epidemic is being driven largely by environmental factors (e.g., high energy/high fat foods, fast food consumption, television watching, "super-sized" portions, etc.) rather than biological ones. Individuals are bombarded with images and offers of high fat, high calorie, highly palatable, convenient, and inexpensive foods. These foods are packaged in portion sizes that far exceed federal recommendations. Furthermore, the physical demands of our society have changed resulting in an imbalance in energy intake and expenditure. Today's stressful lifestyles compound the effects of environmental factors by impairing weight loss efforts and by promoting fat storage. Combating the obesity epidemic demands environmental and social policy changes, particularly in the areas of portion size, availability of healthfu...
International journal of obesity and related metabolic disorders : journal of the International Association for the Study of Obesity, 2001
In studies that involve the use of a room calorimeter, 24 h energy intake is often larger than 24... more In studies that involve the use of a room calorimeter, 24 h energy intake is often larger than 24 h energy expenditure (24 h EE) because of a decrease in activity energy expenditure due to the confined space. This positive energy balance can have large consequences for the interpretation of substrate balances. The objective of this study was to develop a method for predicting an individual's 24 h EE in a room calorimeter at both low (1.4xRMR) and high (1.8xRMR) levels of physical activity. Two methods are presented that predict an individual's 24 h EE in a metabolic chamber. The first method was based on three components: (1) a 30 min measurement of resting metabolic rate (RMR) using a ventilated hood system; (2) measurement of exercise energy expenditure during 10 min of treadmill walking; and (3) estimation of free-living energy expenditure using a tri-axial motion sensor. Using these measurements we calculated the amount of treadmill time needed for each individual in ord...
Changes in substrate oxidation with isoenergetic high-carbohydrate (HC) and high-fat (HF) diets i... more Changes in substrate oxidation with isoenergetic high-carbohydrate (HC) and high-fat (HF) diets in male nonathletic subjects, aerobically trained athletes, and weight-trained athletes were examined in a crossover study. A whole-room respiration chamber was used to measure 24-h energy expenditure (EE) and substrate oxidation with control, HC, or HF diets for 7 d. The nonathletic group had higher 24-h EE (P < 0.05), exercise EE (P < 0.03), and resting metabolic rate (P < 0.04) than did the aerobically trained athletes when these measurements were corrected for lean body mass. Fat oxidation was significantly correlated with lean body mass and diet. However, athletic status had no effect on substrate oxidation. Carbohydrate oxidation across groups increased acutely by 23% after 24 h of the HC diet (P < 0.0001). Carbohydrate balance increased significantly over time with the HC diet (P < 0.002) and decreased acutely after return to the control diet (P < 0.0001). With th...
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