Package 'nutrition'

Basal Metabolic Rate

Description

Estimates the basal metabolic rate of a person.

Usage

bmr(weight, age, fat, height, activity = 1.45, method = "msj", gender = "male")

Arguments

weight	weight, in kilograms
age	age, in years
fat	fat proportion in body
height	height, in centimeters
activity	activity level (a scalar between 1 and 2)
method	calculation method ("msj" for Mifflin-St. Jeor or "kma" for Katch-McArdle)
gender	"male" or "female"

Value

The Basal Metabolic Rate, in kilocalories

Author(s)

Waldir Leoncio

References

https://www.calculator.net/bmr-calculator.html

Mifflin, M. D., St Jeor, S. T., Hill, L. A., Scott, B. J., Daugherty, S. A., & Koh, Y. O. (1990). A new predictive equation for resting energy expenditure in healthy individuals. The American journal of clinical nutrition, 51(2), 241-247.

McArdle, W. D., Katch, F. I., & Katch, V. L. (2010). Exercise physiology: nutrition, energy, and human performance. Lippincott Williams & Wilkins.

Examples

bmr(67, 40, .12, 178) # for an individual with 12% body fat

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Calorie budget

Description

Calculates a calorie budget

Usage

budget(wt_delta_per_week, bmr)

Arguments

wt_delta_per_week	expected change in weight per week
bmr	Basal Metabolic Rate, in kilocalories

Value

Calorie targets per day

Author(s)

Waldir Leoncio

References

https://help.loseit.com/hc/en-us/articles/115007245847-How-the-Calorie-Budget-is-Calculated

Examples

BMR <- bmr(66, 40, .12, 178, method = "kma")
budget(0, BMR) # for weight maintenance with a weekend bonus
budget(.25, BMR) # for a slight weight gain

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Percentage of carbs in food

Description

Calculates how much of the energy content comes from carbohydrates.

Usage

carbPct(fat, carbs, protein, fiber = 0, kcal = 0)

Arguments

fat	grams of fat per unit of measurement (e.g. 100 g)
carbs	grams of carbohydrates per unit of measurement (e.g. 100 g)
protein	grams of protein per unit of measurement (e.g. 100 g)
fiber	grams of fiber per unit of measurement (e.g. 100 g)
kcal	total energy per unit of measurement (e.g. 100 g)

Value

percentage of energy from carbs

Author(s)

Waldir Leoncio

Examples

carbPct(57, 11, 19, 8)

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Calculate the amount of fiber in food

Description

Sometimes, nutritional labels fail to inform the amount of fiber it contains. This function helps one estimate this given other parameters.

Usage

fiberGrams(kcal, fat, carbs, protein)

Arguments

kcal	total energy per unit of measurement (e.g. 100 g)
fat	grams of fat per unit of measurement (e.g. 100 g)
carbs	grams of carbohydrate per unit of measurement (e.g. 100 g)
protein	grams of protein per unit of measurement (e.g. 100 g)

Value

Grams of fiber per unit of measurement

Author(s)

Waldir Leoncio

Examples

fiberGrams(362, 17, 11, 40)

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Macro distribution

Description

Calculates the percentage of energy from each macronutrient.

Usage

macroDistro(fat, carbs, protein, fiber = 0)

Arguments

fat	grams of fat per unit of measurement (e.g. 100 g)
carbs	grams of carbohydrates per unit of measurement (e.g. 100 g)
protein	grams of protein per unit of measurement (e.g. 100 g)
fiber	grams of fiber per unit of measurement (e.g. 100 g)

Value

vector with the energy ratio from each macronutrient

Author(s)

Waldir Leoncio

Examples

macroDistro(12, 40, 32, 1)
macroDistro(12, 40, 32)

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Table of hour of day and percentage of day

Description

Table of hour of day and percentage of day

Usage

pct_of_day

Format

An object of class data.frame with 25 rows and 2 columns.

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Total calories

Description

Calculate the total caloric content of an item given the weight of its macronutrients

Usage

totalKcal(fat, carbs, protein, fiber = 0)

Arguments

fat	grams of fat per unit of measurement (e.g. 100 g)
carbs	grams of carbohydrates per unit of measurement (e.g. 100 g)
protein	grams of protein per unit of measurement (e.g. 100 g)
fiber	grams of fiber per unit of measurement (e.g. 100 g)

Value

Total energy content per unit of measurement

Author(s)

Waldir Leoncio

Examples

totalKcal(48, 1.7, 29)

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