Comparison of dietary intakes of Canadian Armed Forces personnel consuming field rations in acute hot, cold, and temperate conditions with standardized infantry

Mavra Ahmed; Iva Mandic; Wendy Lou; Len Goodman; Ira Jacobs; Mary R. L’Abbé

doi:10.1186/s40779-019-0216-7

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Comparison of dietary intakes of Canadian Armed Forces personnel consuming field rations in acute hot, cold, and temperate conditions with standardized infantry

RESEARCH | Updated：2023-06-05

- Comparison of dietary intakes of Canadian Armed Forces personnel consuming field rations in acute hot, cold, and temperate conditions with standardized infantry
- Comparison of dietary intakes of Canadian Armed Forces personnel consuming field rations in acute hot, cold, and temperate conditions with standardized infantry
- MMR 2020年7卷第1期页码：77-92
- Affiliations：
  
  1.Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Medical Science Building, 1 King’s College Circle, Room 5368, Toronto, Ontario M5S 1A8, Canada
  2.Faculty of Kinesiology and Physical Education, University of Toronto, Toronto M5S 2W6, Canada
  3.Dalla Lana School of Public Health, University of Toronto, Toronto M5T 3M2, Canada
  4.Defence Research and Development Canada – Toronto Research Centre, Toronto M3K 2C9, Canada
- Author bio：
  
  * mary.labbe@utoronto.ca
- Funds：
  
  Defence Research & Development Canada (DRDC);the Canadian Forces Surgeon General’s Health Research Program;In accordance with the Department of National Defence (DND) policy;the paper was reviewed and approved for submission without modification by the DRDC Publications Office. The authors declare that they have no competing interests
- DOI：10.1186/s40779-019-0216-7
  中图分类号：
- 纸质出版：2020-03
- Accepted：
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Comparison of dietary intakes of Canadian Armed Forces personnel consuming field rations in acute hot, cold, and temperate conditions with standardized infantry[J]. MMR, 2020,7(1):77-92.

Cite this article as: Ahmed et al.: Comparison of dietary intakes of Canadian Armed Forces personnel consuming field rations in acute hot, cold, and temperate conditions with standardized infantry activities. Mil Med Res, 2019, 6: 26
Comparison of dietary intakes of Canadian Armed Forces personnel consuming field rations in acute hot, cold, and temperate conditions with standardized infantry[J]. MMR, 2020,7(1):77-92. DOI： 10.1186/s40779-019-0216-7.

Cite this article as: Ahmed et al.: Comparison of dietary intakes of Canadian Armed Forces personnel consuming field rations in acute hot, cold, and temperate conditions with standardized infantry activities. Mil Med Res, 2019, 6: 26 DOI： 10.1186/s40779-019-0216-7.

摘要

Abstract

Background:

Dietary Reference Intakes are used to guide the energy intake of the Canadian Armed Forces (CAF) field rations provided to military personnel deployed for training or operations. However

the high energy expenditures likely to occur under harsh environmental/metabolically challenging deployment conditions may not be adequately considered. This study examined the Ad libitum energy and nutrient intakes of CAF personnel (

=18) consuming field rations in a resting thermoneutral environment and during a day of standardized strenuous infantry activities at varying environmental temperatures.

Methods:

Dietary intake was assessed using a measured food intake/food waste method during the experimental treatment and for 6 h after treatment. Four treatments were administered in a randomized counterbalanced design: exercise (as standardized infantry activities) in the heat (30 °C)

exercise in the cold (–10 °C)

exercise in temperate thermoneutral (21 °C) air temperatures and a resting (sedentary) trial (21 °C).

Results:

The average Ad libitum consumption of field rations was 70% of the provided total energy (2776±99 kcal/8 h) during all treatments. Even with an acute challenge of increased energy expenditure and temperature stress in the simulated field conditions

participants’ energy intakes (1985±747 kcal/8 h) under hot

cold and temperate treatments did not differ from energy intake during the sedentary condition (1920±640 kcal/8 h). Participants’ energy intakes (1009±527 kcal/6 h) did not increase during the 6 h posttreatment period when the stresses of the strenuous physical activities and the harsh environmental temperatures had subsided.

Conclusions:

These results should be considered when planning the provision of field rations for CAF personnel expected to be engaged in strenuous physical activities with prolonged exposure to temperature extremes.

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Keywords

references

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