Current Concepts in Sports Nutrition - Australian Sports Commission

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MANAGING BODY COMPOSITION Maintain adequate protein intake A reduced-energy diet still needs to provide an adequate amount of protein, spread across meals and snacks over the day. Ensuring that protein requirements are met is important to help minimise muscle wasting and loss of strength during periods of weight loss. Protein added to a meal or snack can increase the satiety value or ‘fillingness’ of the food choice, helping with appetite control. Finally, many lean proteinrich foods also provide other key nutrients to the menu, such as iron, calcium and B-vitamins. Target high fat foods Energy reductions can be achieved by removing surplus amounts of fat from the diet. Strategies to meet this goal include choosing lower-fat versions of everyday foods and using low-fat cooking methods where possible. Keeping a food record can be a useful way to see where hidden extras sneak into the diet. Learning to read food labels is another asset that can help the athlete to address the quantity and quality of their food choices. Tips for healthy intake of fat Reduce sources of saturated fat such as butter, cream, full-cream dairy products, fatty meat, cakes, pastries and deep fried foods. Be aware of hidden fat in processed foods and takeaways. Choose reduced-fat dairy foods. Trim visible fat from meat and chicken. Use small amounts of healthy oils in cooking, such as olive and canola oils. Include sources of mono-unsaturated and polyunsaturated fats in the diet such as fish (fresh or canned), olive oil, avocado, linseeds, nuts and seeds. Timing of weight loss Losing body fat should be a long-term goal. Consistent weight loss of 1⁄2–1 kilogram per week is a suitable goal for most athletes and can usually be achieved by a small reduction of daily energy intake. When large reductions in body fat are required, weight loss efforts should be undertaken during a period that is well removed from competition. Realistic goals and an achievable time frame are important for successful long-term loss of body fat.
Long-term energy restriction — the downside Managing Body Composition / 16 Long-term energy restriction can lead to reductions in metabolic rate, a disturbed menstrual cycle and decreased testosterone levels. These outcomes can lead to decreases in strength/power and an impairment of bone health. It is important to have close guidance from a sports dietitian to ensure that key nutrients are being provided (especially iron and calcium) and to have regular ways to assess that long-term health and performance are being maintained. A note on injury and off-season The injured or tapering athlete has reduced energy requirements compared to their needs during regular training. Some athletes continue to eat the same amount of energy despite a reduction in training, leading to weight gain. The guidance of a sports dietitian can help athletes adjust their energy intake to their specific needs. Reading list Burke LM. Energy needs of athletes. Canadian Journal of Applied Physiology, 2001; 26 (Suppl): S202-19. Loucks AB. Energy balance and body composition in sports and exercise. Journal of Sports Sciences, 2004; 22: 1–14. Maughan R, Greenhaff J, Leiper D, Ball Lambert C, Gleeson M. Diet composition and the performance of high intensity exercise. Journal of Sports Sciences, 1997; 15: 265–75.
Page 1 and 2: Current Concepts in Sports Nutritio
Page 3 and 4: Introduction INTRODUCTION Whether y
Page 5 and 6: Energy balance Energy Balance / 2 M
Page 7 and 8: Other food choices providing 30g of
Page 9 and 10: Energy Balance / 6 What about prote
Page 11 and 12: Reading list Energy Balance / 8 Ame
Page 13 and 14: Tips for achieving a high-energy di
Page 15 and 16: Case study: Men’s Basketball and
Page 17: How low can you go? Impact of low-c
Page 21 and 22: Fuelling Up / 18 In many sports, co
Page 23 and 24: Fuelling Up / 20 Timing Food item C
Page 25 and 26: Pre-event Preparation / 22 The exac
Page 27 and 28: Fluid requirements Pre-event Prepar
Page 29 and 30: During Exercise / 26 When sweat los
Page 31 and 32: Application to sport During Exercis
Page 33 and 34: Reading list During Exercise / 30 B
Page 35 and 36: Refuelling post-exercise Recovery /
Page 37 and 38: Recovery / 34 consumption after tra
Page 39 and 40: Reading list Recovery / 36 Armstron
Page 41 and 42: Immune Function / 38 • Maintain (
Page 43 and 44: Dietary Supplements / 40 PowerBar h
Page 45 and 46: Reading list Dietary Supplements /
Page 47 and 48: Recommended uses by the AIS Departm

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