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Table 1 Energy and macronutrients available and consumed from self-selected individual meal packs or field rations provided to participants during the 8 h experimental treatments and during the postexperimental treatments (total of 24 h).[Mean ± SD]

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

Individual meal pack1 Energy (kcal) Carbohydrates (g) Total fat (g) Protein (g)
Breakfast 1344 ± 104 221 ± 31 41 ± 11 31 ± 5
Lunch 1432 ± 78 224 ± 22 41 ± 10 43 ± 7
Dinner/Supper 1317 ± 81 200 ± 21(61%)5 39 ± 8 (26%)5 42 ± 10 (13%)5
LMC 1125 ± 172 203 ± 23 (72%)5 25 ± 3 (20%)5 35 ± 1 (12%)5
DRI (g)/AMDR (%)2(/d) 2800–3200 338–488 (45–65%) 67–117 (20–35%) 75–262 (10–35%)
Total available3/ 8 h (% of total energy) 2776 ± 99 445 ± 25 (64%) 82 ± 10 (27%) 74 ± 9 (11%)
Total available3/ 24 h (% of total energy) 4093 ± 97 645 ± 26 (63%) 121 ± 9 (26%) 116 ± 9 (11%)
Average consumed4/ 8 h 1970 ± 718 295 ± 119 (59%) 61 ± 23 (28%) 63 ± 23 (13%)
Average consumed4/ 24 h 2979 ± 918 443 ± 153 (59%) 92 ± 29 (28%) 99 ± 26 (13%)
  1. 1Individual Meal Packs or field rations consisted of a choice of a variety of foods and beverages from 18 menu items (6 breakfast, 6 lunch and 6 dinner/supper), which participants (n = 18) preselected for their experimental treatments. Once selected, each participant consumed Ad libitum from the exact same menu items during each of the experimental treatments (sedentary, 21 °C), cold (− 10 °C), hot (30 °C) and temperate (21 °C); humidity (~ 30% in the sedentary, hot and temperate treatment and 50% in the cold treatments). The 24 h data included at home 6 h posttreatment meals. 2Dietary Reference Intakes (DRI)/ Average Macronutrient Distribution Ranges (AMDR) [45] (for a moderately active to highly active 70 kg male); Carbohydrates, fat and protein AMDR values were based on an average intake of 3000 kcal/d. 3The total available/d corresponds to the total amount of nutrients available for consumption if the three ration packs (breakfast, lunch and dinner) were consumed in their entirety.4Consumed indicates the average amount of energy and macronutrients eaten during the 8 h experimental treatments (in the environmentally controlled chamber) and during the 24 h (including the at home 6 h posttreatment) (as measured using the measured food intake/food waste collection method). 5 The percentages indicate the energy contribution of the macronutrients where the data were calculated using the energy contribution of 4 kcal/g for carbohydrates and protein and 9 kcal/g for fat. AMDR. Average Macronutrient Distribution Range; LMC. Light Meal Combat