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Modeling body mass variation: incorporating social influence into calculations of caloric intake and energy expenditure.

Hernández-Hernández AM, Huerta-Quintanilla R - PLoS ONE (2014)

Bottom Line: We observe that social interactions have a considerable effect when the body mass of an individual is quite constant and social interactions take random values.However, when an individual's mass value changes (either increases or decreases), social interactions do not have a notable effect.In our simulation, we tested two different models that describe the body mass composition, and it resulted that one fits better the data.

View Article: PubMed Central - PubMed

Affiliation: Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mérida, Yucatán, México.

ABSTRACT
Variations in individual body mass and composition have long been a key focus in the health sciences, particularly now that overweight and obesity are considered as public health problems. We study a mathematical model that describes body mass variations which are determined by the energy balance between caloric intake and total energy expenditure. To calculate the change in caloric intake and energy expenditure over time, we proposed a relationship for each of these quantities, and we used measured values that are reported in the literature for the initial conditions. To account for small variations in the daily energy balance of an individual, we include social interactions as the multiplication of two terms: social proximity and social influence. We observe that social interactions have a considerable effect when the body mass of an individual is quite constant and social interactions take random values. However, when an individual's mass value changes (either increases or decreases), social interactions do not have a notable effect. In our simulation, we tested two different models that describe the body mass composition, and it resulted that one fits better the data.

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Related in: MedlinePlus

Body mass, intake and total energy expenditure variation for a male.Characteristics: 38.44 years of age, 99.52 kg initial body mass, 3506.32 kcal initial intake and 3527.51 kcal total energy expenditure.
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pone-0111709-g003: Body mass, intake and total energy expenditure variation for a male.Characteristics: 38.44 years of age, 99.52 kg initial body mass, 3506.32 kcal initial intake and 3527.51 kcal total energy expenditure.

Mentions: The first example is a man who is 38.44 years old and 1.76 m in height (figure 3). His initial values are 99.52 kg weight, 37.11 body fat percentage, 3506.32 kcal intake and 3527.51 kcal total energy expenditure. The variations in mass, intake and energy expenditure over time have the same functional shape. As becomes greater than zero, the intake variation increases over time, and consequently, the body mass variation also increases. Thus, as the value of increases, more time is required to reach a stable value. In addition, the difference between the caloric intake and energy expenditure is negative, causing the individual to lose weight.


Modeling body mass variation: incorporating social influence into calculations of caloric intake and energy expenditure.

Hernández-Hernández AM, Huerta-Quintanilla R - PLoS ONE (2014)

Body mass, intake and total energy expenditure variation for a male.Characteristics: 38.44 years of age, 99.52 kg initial body mass, 3506.32 kcal initial intake and 3527.51 kcal total energy expenditure.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4219765&req=5

pone-0111709-g003: Body mass, intake and total energy expenditure variation for a male.Characteristics: 38.44 years of age, 99.52 kg initial body mass, 3506.32 kcal initial intake and 3527.51 kcal total energy expenditure.
Mentions: The first example is a man who is 38.44 years old and 1.76 m in height (figure 3). His initial values are 99.52 kg weight, 37.11 body fat percentage, 3506.32 kcal intake and 3527.51 kcal total energy expenditure. The variations in mass, intake and energy expenditure over time have the same functional shape. As becomes greater than zero, the intake variation increases over time, and consequently, the body mass variation also increases. Thus, as the value of increases, more time is required to reach a stable value. In addition, the difference between the caloric intake and energy expenditure is negative, causing the individual to lose weight.

Bottom Line: We observe that social interactions have a considerable effect when the body mass of an individual is quite constant and social interactions take random values.However, when an individual's mass value changes (either increases or decreases), social interactions do not have a notable effect.In our simulation, we tested two different models that describe the body mass composition, and it resulted that one fits better the data.

View Article: PubMed Central - PubMed

Affiliation: Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mérida, Yucatán, México.

ABSTRACT
Variations in individual body mass and composition have long been a key focus in the health sciences, particularly now that overweight and obesity are considered as public health problems. We study a mathematical model that describes body mass variations which are determined by the energy balance between caloric intake and total energy expenditure. To calculate the change in caloric intake and energy expenditure over time, we proposed a relationship for each of these quantities, and we used measured values that are reported in the literature for the initial conditions. To account for small variations in the daily energy balance of an individual, we include social interactions as the multiplication of two terms: social proximity and social influence. We observe that social interactions have a considerable effect when the body mass of an individual is quite constant and social interactions take random values. However, when an individual's mass value changes (either increases or decreases), social interactions do not have a notable effect. In our simulation, we tested two different models that describe the body mass composition, and it resulted that one fits better the data.

Show MeSH
Related in: MedlinePlus