It is a proven fact that diet can definitely impact athletic performance, and a vegetarian diet can certainly provide all of the energy and nutrients that individuals need to power themselves through their next workout or competition. However, just like all diets, a vegetarian diet takes some planning. Most vegetarian diets can meet the nutritional needs of athletes, if they include a wide variety of foods. The following tips can help ensure that you perform at your optimal ability.
- Protein requirement for endurance athletes:
- 1.2-1.4 grams (g)/kilogram (kg)/day
- Can increase to as much as 1.6-1.7 g/kg/day in times of intense exercise
- Protein in some plants is not completely digested:
- Vegetarians and vegans may need to eat more to ensure that they are getting enough protein
- Even though most vegetarians easily meet the requirement for protein, vegans, strength-trained athletes, or athletes with very intense training regiments or low-food intake may want to:
- Use nutritional shakes and protein supplements to meet their needs, or
- Focus on improving their protein intake through careful dietary planning
- Carbohydrate requirements:
- 5-7 g of carbohydrate/kg/day for general training (usually)
- 7-10 g of carbohydrate/kg/day (likely)
- Most athletes should aim to have 60%-65% of their total caloric intake from carbohydrate, although the total amount can vary depending on body weight
- Most of the calories that athletes consume should come from complex carbohydrates, such as:
- Whole-wheat breads
- Whole-wheat pastas
- Whole-wheat cereals
- Brown rice
- A diet with too much emphasis on carbohydrates can crowd out necessary fat consumption
- Good sources of fat include:
- Nut butters
- Olive oil
Vitamins and minerals
- Deficiencies: Vegetarian athletes are most likely to become deficient in the following vitamins and minerals (deficiencies more common in females):
- Vitamin D
- Vitamin B12
- Nonheme iron:Most plant foods contain nonheme iron, which is not as well absorbed as heme iron:
- Iron and vitamin C: Pair iron-rich foods with foods containing vitamin C, such as citrus
- Iron and calcium: Do not pair foods containing iron and calcium, which interferes with iron absorption
- Phytic acids: The absorption of zinc from plant foods is hindered by the presence of phytic acids, making the zinc less absorbable than the zinc found in animal-based foods
- B12: This vitamin is found only in animal foods, making fortified foods necessary for vegetarians and vegans
- Vitamin D: This vitamin exists naturally in animal products and is synthesized from exposure to sunlight
- Spinach: Although high in calcium, spinach is not a good source of calcium because of the presence of oxalates, which makes for poor absorption of calcium
Vegetarian/Vegan Food Sources
References and recommended readings
Larson DE. Vegetarian diet for exercise and athletic training and performing: an update. Available at: http://www.vegetarian-nutrition.info/vn/vn_athletes.htm. Accessed August 3, 2009.
Larson E. Eat better, perform better: sports nutrition guidelines for the vegetarian. Available at: http://www.vrg.org/nutshell/athletes.htm. Accessed August 3, 2009.
People for the Ethical Treatment of Animals. Vegetarianism: a winning formula for athletes. Available at: http://www.goveg.com/vegetarian_athletes.asp. Accessed August 3, 2009.
Spock B. Vegetarian diet for athletes. Available at: http://veg.ca/content/view/278/113/. Accessed August 3, 2009.
Vegan Society. Calcium. Available at: http://www.vegansociety.com/food/nutrition/calcium.php. Accessed August 3, 2009.
Vegan Society. Iron. Available at: http://www.vegansociety.com/food/nutrition/iron.php.Accessed August 3, 2009.
Vegan Society. Vitamin D. Available at: http://www.vegansociety.com/food/nutrition/vitaminD.php. Accessed August 3, 2009.
Review Date 10/09