Energy expenditure and intake during Special Operations Forces field training in a jungle and glacial environment.
Appl Physiol Nutr Metab
; 43(4): 381-386, 2018 Apr.
Article
em En
| MEDLINE
| ID: mdl-29144888
ABSTRACT
The purpose of this study was to identify and compare energy requirements specific to Special Operations Forces in field training, in both cool and hot environments. Three separate training sessions were evaluated, 2 in a hot environment (n = 21) and 1 in a cool environment (n = 8). Total energy expenditure was calculated using doubly labeled water. Dietary intake was assessed via self-report at the end of each training mission day, and macronutrient intakes were calculated. Across the 3 missions, mean energy expenditure (4618 ± 1350 kcal/day) exceeded mean energy intake (2429 ± 838 kcal/day) by an average of 2200 kcal/day. Macronutrient intakes (carbohydrates (g/(kg·day body weight (bw))-1) = 3.2 ± 1.2; protein (g/(kg·day bw)-1) = 1.3 ± 0.7; fat (g/(kg·day bw)-1) = 1.2 ± 0.7) showed inadequate carbohydrate and possibly protein intake across the study period, compared with common recommendations. Total energy expenditures were found to be similar between hot (4664 ± 1399 kcal/day) and cool (4549 ± 1221 kcal/day) environments. However, energy intake was found to be higher in the cool (3001 ± 900 kcal/day) compared with hot (2200 ± 711 kcal/day) environments. Based on the identified energy deficit, high variation in energy expenditures, and poor macronutrient intake, a greater attention to feeding practices during similar training scenarios for Special Operations Forces is needed to help maintain performance and health. The differences in environmental heat stress between the 2 climates/environments had no observed effect on energy expenditures, but may have influenced intakes.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Temperatura Baixa
/
Camada de Gelo
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Ingestão de Alimentos
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Metabolismo Energético
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Meio Ambiente
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Condicionamento Físico Humano
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Temperatura Alta
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Militares
Tipo de estudo:
Guideline
/
Health_economic_evaluation
Limite:
Adult
/
Humans
Idioma:
En
Revista:
Appl Physiol Nutr Metab
Assunto da revista:
CIENCIAS DA NUTRICAO
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FISIOLOGIA
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MEDICINA ESPORTIVA
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METABOLISMO
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Estados Unidos