The influence of a basic military training diet on whole blood fatty acid profile and the Omega-3 Index of Australian Army recruits
- 1 February 2022
- journal article
- research article
- Published by Canadian Science Publishing in Applied Physiology, Nutrition, and Metabolism
- Vol. 47 (2), 151-158
- https://doi.org/10.1139/apnm-2021-0459
Abstract
This study described the whole blood fatty acid profile and Omega-3 Index (O3I) of Australian Army recruits at the commencement and completion of basic military training (BMT). Eighty (80) males (17-34 y, 77.4±13.0 kg, 43.5±4.3 mL/kg/min) and 37 females (17-45 y, 64.3±8.8 kg, 39.3±2.7 mL/kg/min) volunteered to participate (N=117). Whole blood samples of each recruit were collected using a finger prick in weeks 1 and 11 (n=82) and analysed via gas chromatography for the relative proportions of each fatty acid (mean [95% CI]). The macronutrient characteristics of the diet offerings was also determined. At commencement there was a low omega-3 status (sum of omega-3; 4.95% [4.82-5.07]) and O3I (5.03% [4.90-5.16]) and no recruit recorded an O3I >8% (desirable). The omega-6/omega-3 (7.04 [6.85-7.23]) and arachidonic acid / eicosapentaenoic acid (AA/EPA) (18.70 [17.86-19.53]) ratios for the cohort were also undesirable. The BMT mess menu provided a maximum of 190 mg/day of eicosapentaenoic acid (EPA) and 260 mg/day of docosahexaenoic acid (DHA). The O3I of the recruits was lower by week 11 (4.62% [4.51-4.78], p<0.05), the omega-6/omega-3 increased (7.27 [7.07-7.47] p<0.05) and the AA/EPA remained elevated (17.85 [16.89-18.81]). In conclusion, Australian Army recruits’ omega-3 status remained undesirable during BMT and deserves nutritional attention.Novelty Bullets • Australian Army recruits’ Omega-3 Index, at the commencement of BMT, was reflective of the Western-style diet. • The BMT diet offered minimum opportunity for daily EPA and DHA consumption.• Every recruit experienced a further reduction of their Omega-3 Index during BMT.Keywords
This publication has 61 references indexed in Scilit:
- Red blood cell omega-3 fatty acid levels and neurocognitive performance in deployed U.S. ServicemembersNutritional Neuroscience, 2013
- Omega‐3 polyunsaturated fatty acids and inflammatory processes: nutrition or pharmacology?British Journal of Clinical Pharmacology, 2012
- Association of Military Training with Oxidative Stress and OverreachingMedicine & Science in Sports & Exercise, 2011
- Low dietary fish-oil threshold for myocardial membrane n-3 PUFA enrichment independent of n-6 PUFA intake in ratsJournal of Lipid Research, 2010
- Towards Establishing Dietary Reference Intakes for Eicosapentaenoic and Docosahexaenoic AcidsJournal of Nutrition, 2009
- Fish Oil Reduces Heart Rate and Oxygen Consumption During ExerciseJournal of Cardiovascular Pharmacology, 2008
- Omega-3 fatty acid supplementation enhances stroke volume and cardiac output during dynamic exerciseEuropean Journal of Applied Physiology, 2008
- Long‐chain omega‐3 fatty acids in red meatNutrition & Dietetics, 2007
- Fish Intake, Contaminants, and Human HealthJAMA, 2006
- The Omega-3 Index: a new risk factor for death from coronary heart disease?Preventive Medicine, 2004