Desenvolvimento e validação de uma ecuación para prever o gasto energético total em um grupo de adultos mexicanos.
DOI:
https://doi.org/10.12873/413ortizPalavras-chave:
total energy expenditure, adults, physical activity, resting energy expenditure, indirect calorimetry, heart rateResumo
O objetivo do estudo foi desenvolver e validar uma equação aplicável em adultos mexicanos para prever o gasto energético total (TEG) com base em medidas antropométricas e questionários de atividade física. Para isso, foi realizado um estudo de validação com uma amostra de adultos mexicanos (n = 115, 37% homens) que foi dividida aleatoriamente em duas subamostras para desenvolver e validar novas equações para estimar o GET. Como método de referência, o GET foi medido por calorimetria indireta e monitoramento da frequência cardíaca por pelo menos três dias. Foram estimados modelos de regressão linear múltipla em que os preditores do GET foram idade, sexo, massa gorda e não gorda, peso corporal e nível de atividade física (NAF), que foi avaliado por meio de duas questões. A equação desenvolvida é a seguinte: GET (kcal / d) = 1331,712 - (686,344 x sexo, homens: 1, mulheres: 2) + (18,051 x peso corporal, kg) - (16,020 x idade, anos) + (894,007 x NAF). A precisão da equação foi modesta nas subamostras de desenvolvimento (R2 = 54,4, erro padrão = 511,3) e validação (R2 = 59,2, erro padrão = 372,8). No entanto, essa equação foi mais precisa do que os métodos fatoriais (FAO / OMS ou equivalentes metabólicos de Ainsworth) e as equações empíricas para estimar o GET. Assim, uma equação simples foi desenvolvida para estimar o GTE de adultos mexicanos, que pode ser usada como um guia geral para fornecer orientação nutricional.Referências
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