The Vegan Athlete

 

With the growing interest in veganism and health, many athletes are turning to a vegan way of eating whilst competing. Poorly constructed vegan diets might predispose individuals to macronutrient (protein, omega 3) and micronutrient (vitamin B12, vitamin D, iron, zinc, calcium and iodine deficiencies.

In order to ensure that vegan diets meet both health and performance needs, basic dietary requirements have to be met and sport-specific diet-related objectives need to be achieved. Athletes often compete and train at high intensities which often puts them in a negative energy balance. This may lead to weight loss, muscle atrophy and decreased energy levels. Managing energy balance is thus important for all athletes, but this issue is likely to be compounded further when a diet promotes early satiation and reduced appetite, such as a vegan diet.

Data indicates that vegans consume less energy than omnivores, and research suggests that vegetarian diets generally appear to be lower in protein, fat, vitamin B12, Riboflavin, vitamin D, calcium, iron and zinc when compared to an omnivorous diet. In order to meet energy requirements ,increasing frequency of energy dense fats such as nuts, seeds and oils may be helpful in meeting calorie goals.

Carbohydrates are the primary fuel source for exercise, especially at high intensity. Achieving an adequate carbohydrate intake via a vegan diet is definitely achievable as grains, legumes, beans, tubers, root vegetables and fruits can all be consumed to meet carbohydrate requirements satisfactorily.

In order for vegan athletes to meet protein requirements it is recommended that there is adequate consumption of beans, pulses, lentils and grains daily—foods that happen to be abundant in carbohydrates to. The problem that may rise is that these products are also high in fibre which provide volume and bulk, this ultimately promotes early satiety. For those athletes that require higher energy intake, the adequate consumption of fibre rich food to achieve protein and carbohydrate intake may prove to be difficult; albeit do-able. A high fibre may also promote gastric distress (stomach pain) in some cases and therefor it is of utmost importance that race day nutrition is always practiced. Foods such as rice, pasta, noodles and buckwheat contain less fibre than oats, lentils, beans and wholegrain breads and removing the skin from tubers and root vegetables (potatoes) reduces the fibre contents of these foods whilst also maintaining carbohydrates levels.This serves to be useful decrease gastric discomfort when competing and training.

The optimisation of protein intakes for vegan athletes requires that attention is paid to the quantity and quality of protein consumed. Plant-based protein sources are often incomplete, missing important essential amino acids, and typically contain less Branched Chain Amino Acids (BCAA) than their animal-based equivalent. The branched chain amino acid Leucine plays an important role in promoting recovery. Plant-based protein supplements that feature in the literature and are commercially available and include soy (and soy isolate), pea, rice, hemp and composite/blended protein products . Protein supplements may be necessary for improving recovery from training and fostering muscle hypertrophy as part of a resistance training program. Individual dietary requirements should be calculated by a registered dietitian to determine if this is necessary.

Another consideration to take into account is iron intake. The main source of iron in the vegan diet is found in the non-haem form, which is less bioavailable than the haem iron found in animal products ,Vegan diets also commonly contain dietary inhibitors such as the polyphenols tannin (found in coffee, tea, and cocoa) and phytates (found in whole grains and legumes), which reduce the amount of iron absorbed from the diet.

Non-haem iron absorption can be enhanced (as well as inhibited), and consuming non-haem iron- rich foods in conjunction with vitamin C appears to increase absorption .Vegan athletes should therefore look to achieve iron sufficiency by choosing wholefood iron sources, reducing their consumption of inhibitor-containing foodstuffs such as tea, coffee and cocoa (when eating iron-rich meals), consume vitamin C containing foods concurrently to enhance absorption, and incorporate soaked, sprouted and/or fermented foods in their diets, if palatable. In cases of where individuals might be prone to iron deficiency, i.e. females with large menstrual blood losses, monitoring iron status and considering supplementation might be necessary.

Blog Sources: https://nutritionsynergy.co.uk/the-vegan-athlete/

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Is my child getting enough Iron?

 

Iron is needed for healthy red blood cells which carry oxygen around the body and for normal growth and development.  Low levels of iron cause iron deficiency anaemia, which can result in (1):

•          Tiredness, irritability and poor concentration
•          Pale skin
•          Poor appetite
•          Poor growth and more frequent infections

Iron deficiency anaemia is diagnosed after a blood test is done.

Main causes of Iron Deficiency Anaemia

Poor diet is the most likely cause in babies from 6 -24 months (2). Not eating enough foods high in iron . Many children replace iron rich food sources with juices, sweets and processed foods and as a result don’t get enough nutrient dense sources of food daily.

Filling up on milk!  Keep to a maximum of a 450ml a day  in children over 2 years old so you don’t spoil your appetite and you have room for plenty of foods high in iron.

Where the diet has good sources of iron other causes for iron deficiency anaemia should be investigated (can also be found in Coeliac Disease).

Vitamin C can increase the amount of iron absorbed from plant foods(4)

Most fruit and vegetables are rich in vitamin C, so try to eat plenty of these with your meals, particularly:

•          Citrus fruits such as oranges, satsumas, grapefruit and their fruit juices
•          Blackcurrant & juice-based drinks (low sugar options are available)
•          Kiwi, pomegranate & all berries
•         Lightly cooked cabbage, broccoli, spinach & other green vegetables
•          Peppers, tomatoes and salad vegetables

It is important to note that very high fibre intakes and high intakes of tea can reduce the amount of iron absorbed. The tannin found in tea can reduce the absorption of the iron from food, so try not to drink tea with your meals. 

Iron deficiency anaemia can be reversed through dietary changes. It is extremely important to see a dietitian if your child has iron deficiency anaemia, or you may suspect your child's iron intake is low. There are certain ‘enhancers’ and ‘inhibitors’ that are involved in iron absorption that you dietitian would explain to you, specific to your child's current eating habits. Here at nutrition synergy, we have a specialist paediatric dietitian who will help with reversing your child's iron deficiency and give you a meal plan for your child to ensure they are meeting their requirements.

Blog Sources:  https://nutritionsynergy.co.uk/is-my-child-getting-enough-iron/

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