Leena Watts
A balanced diet is essential for athletes to maintain optimal health and enhance their performance. While the ideal diet for athletes is similar to the general recommended healthy diet, athletes have different nutritional needs depending on their sport, goals, age, and training intensity. This diet should be rich in unrefined carbohydrates, such as whole grains, fruits, and vegetables, to provide sustained energy. Sufficient protein intake is also crucial for muscle growth and repair, while fats should be consumed in moderation, with a preference for healthy sources such as olive oil, avocado, nuts, and seeds. Additionally, athletes should focus on hydration by consuming adequate fluids, especially water, to maintain proper body temperature and replace fluids lost during exercise. Overall, a well-planned and tailored nutrition plan is key to supporting the health and performance of athletes.
| Characteristics | Values |
|---|---|
| Carbohydrates | Athletes need carbohydrates to provide energy during exercise. Foods rich in unrefined carbohydrates, like wholegrain breads and cereals, should form the basis of an athlete's diet. |
| Proteins | Athletes need proteins for muscle growth and to repair body tissues. Good sources of protein include fish, lean meats, poultry, eggs, dairy, nuts, soy, and peanut butter. |
| Fats | Athletes should limit their fat intake, especially before an athletic event. Fats should come from olive oils, avocado, nuts, and seeds. |
| Vitamins and Minerals | Athletes need vitamins and minerals for optimal health and performance. Calcium and iron are two important minerals for athletes. Calcium helps build strong bones and protect against stress fractures. Iron depletion is common in athletes due to diets poor in meat, fish, and poultry, or increased iron loss in urine, feces, sweat, or menstrual blood. |
| Water and Fluids | Water and other fluids are essential to keep the body hydrated and regulate body temperature. |
| Calories | Athletes need to balance energy intake with energy expenditure to prevent an energy deficit or excess. Athletes who exercise strenuously for more than 60-90 minutes every day may need to increase their calorie consumption. |
| Individualization | Sports nutrition plans should be tailored to the individual athlete, considering their specific sport, goals, food preferences, and practical challenges. |
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What You'll Learn
Carbohydrates for energy
Carbohydrates are the body's main source of energy for athletic events. They are indispensable for high-intensity performance. During digestion, all carbohydrates are broken down into sugars (primarily glucose), which are the body's primary energy source. Carbohydrates are needed to provide energy during exercise.
There are two types of carbohydrates: simple and complex. Simple carbohydrates, or sugars, are naturally found in fruits, vegetables, dairy, sugar-sweetened beverages, and desserts. They act as fast energy sources and are great for athletes to help recover energy levels before or after competition or practices. Complex carbohydrates, or starch, are naturally found in grains, breads, cereals, potatoes, and legumes. They are slow and steady energy sources that provide long-lasting energy for athletes. They are ideal for meals.
Athletes can increase their stores of glycogen, a stored form of glucose in the liver and muscle, by regularly eating high-carbohydrate foods. If the carbohydrate in the diet is restricted, a person's ability to exercise may be compromised because there is not enough glycogen kept in storage to fuel the body. Carbohydrate feedings before exercise can help restore glycogen stores, which may be called upon during prolonged training and in high-intensity competition.
The amount of carbohydrates needed varies depending on the duration, frequency, and intensity of exercise. Athletes who exercise strenuously for more than 60 to 90 minutes every day may need to increase their carbohydrate intake. For example, basketball practice for two hours daily requires more carbohydrate than a 10-minute daily run. Younger athletes, like teens, also have greater energy and carbohydrate needs at the same activity levels than older athletes.
The glycaemic index (GI) ranks food and fluids by how 'carbohydrate-rich' they are and how quickly they affect the body's blood sugar levels. Low GI foods may be useful before exercise to provide a more sustained energy release, while moderate to high GI foods and fluids may be most beneficial during exercise and in the early recovery period.
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Protein for muscle growth and repair
A well-planned, nutritious diet is essential for athletes to meet their vitamin, mineral, and protein needs. Protein is particularly important for muscle growth and repair. While intense exercise can damage muscles, protein provides the amino acids required to repair this damage, helping the muscles grow back stronger.
Athletes can meet their protein needs by eating more total calories, ensuring they consume enough protein-rich foods. The recommended daily allowance (RDA) of protein for people aged 18 and over is 0.8 grams per kilogram of body weight, which equates to 10% to 35% of their daily calories. However, athletes with intense training regimens may require up to twice the daily recommended intake of protein, ranging from 1.4 to 2.0 grams per kilogram of body weight. This can be achieved through a regular and varied diet that includes protein-rich foods.
Protein-rich foods include animal sources such as meat, fish, eggs, and dairy, which are considered complete sources of protein as they contain all the essential amino acids. Vegetarian and vegan athletes can also meet their protein needs by consuming a variety of plant-based sources, including pulses, nuts, soy products, beans, legumes, and seeds. However, it is important to note that plant proteins may lack certain essential amino acids, so combining different plant sources can ensure a complete amino acid profile.
Protein supplements, such as powders, shakes, and bars, are also available and can be a convenient way to increase protein intake. Whey protein, for example, is a water-soluble milk protein that the body absorbs quickly and easily. Casein, another dairy-based protein, is rich in glutamine, which may accelerate muscle recovery. Soy protein is a suitable alternative for those who do not consume dairy. Additionally, plant-based protein powders like pea protein offer a high-quality option and are a good source of the amino acid arginine.
While protein is crucial for muscle growth and repair, it is important to remember that a balanced diet includes a variety of other nutrients. Carbohydrates, for instance, are the body's primary source of energy during exercise, and athletes should ensure adequate intake to support their training regimen.
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Vitamins and minerals
Calcium, vitamin D, and iron are particularly important for athletes. Calcium is crucial for bone health, enzyme activity, and muscle contraction. It can be found in dairy products, broccoli, spinach, and fortified grain products. Vitamin D, obtained through sun exposure and fortified foods like milk, is also vital for bone health and calcium absorption. Iron is essential for oxygen delivery to body tissues, and athletes should be periodically screened for iron status, especially female athletes, vegetarians, and distance runners.
Athletes should also ensure adequate vitamin and mineral intake by avoiding high-fat meals before exercise, as they can delay gastric emptying and adversely affect performance. Instead, they should focus on consuming complex carbohydrates, which provide energy, fibre, vitamins, and minerals. Simple sugars, such as soft drinks, jams, and candies, provide calories but lack vitamins, minerals, and other essential nutrients.
While protein is important for muscle growth and repair, most athletes only need a small amount of extra protein, which can be easily obtained through their diet. Water is also a crucial but often overlooked nutrient for athletes, as it keeps the body hydrated and regulates temperature.
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Water and hydration
Water is essential for athletes, who need to pay particular attention to their hydration levels. Water has a direct impact on athletic performance, with dehydration affecting flexibility, speed, endurance, and mood. Water also helps to regulate body temperature and replace sweat losses during exercise.
Athletes should ensure they are drinking enough water before, during, and after exercise. The amount of water required depends on several factors, including age, body size, level of physical activity, and environmental temperature. As a general guide, athletes should consume 400-600ml of cold water 2-3 hours before their event. During sporting activities, 150-300ml of fluid should be consumed every 15-20 minutes. For events lasting under an hour, water is usually sufficient, while sports drinks are recommended for longer events or those taking place in hot, humid weather.
Sports drinks are designed to help athletes stay hydrated and replenished, and they typically contain water, electrolytes, and sugar for energy. However, some sports drinks have a high sugar content, which can add calories and increase the risk of obesity if overconsumed. Therefore, zero-sugar drinks are also available. It is important to note that plain water is also hydrating and the least expensive option. Sparkling water is just as hydrating as non-carbonated tap water, and drinking water with added electrolytes and water-soluble vitamins can also be beneficial.
In addition to drinking enough water, eating certain foods can also help with hydration. Fruits such as pineapple, watermelon, and apricots are hydrating and can be combined with water or sports drinks. Smoothies are also a good option as they are easy to digest and can provide a balanced meal.
It is important to be mindful of overhydration, as consuming excessive amounts of fluids can lead to hyponatraemia, a condition where the blood becomes too diluted, causing a low concentration of sodium. This can potentially lead to serious health complications. Therefore, it is essential to customize fluid intake to individual athletes, taking into account factors such as climate and sweat rates.
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Fat and sugar
Sugar and fat are both important components of an athlete's diet. Carbohydrates, like sugar, are the body's main source of energy. Sugars are processed differently when exercising, and athletes need to eat adequate amounts of sugar before and during activity to fill up their glycogen stores and prevent fatigue. This is especially true for intense exercise, where sugars are the most efficient and effective way to fuel the body. However, for low-intensity exercise, fat metabolism can be the main source of fuel.
The body can store enough glycogen to ride for a maximum of about two hours, but these stores are used up more quickly during high-intensity exercise. During digestion, all carbohydrates are broken down into sugars (mainly glucose), which are the body's primary energy source. Therefore, athletes who exercise strenuously for more than 60 to 90 minutes daily may need to increase their energy intake, particularly from carbohydrates.
However, athletes should be careful not to over-consume sugar, as this can lead to chronically elevated blood glucose levels, which can cause metabolic disorders such as insulin resistance and type II diabetes. Instead, athletes should focus on eating a balanced diet that includes a variety of foods such as wholegrain breads and cereals, vegetables, fruit, lean meat, and low-fat dairy products.
When it comes to fat, athletes should generally follow the recommendations given to the general population. Good fats are key nutrients in a healthy diet, as they slow down the absorption of carbohydrates and provide steady energy. The preference is for fats to come from olive oils, avocados, nuts, and seeds. Athletes should aim to minimise their intake of high-fat foods such as biscuits, cakes, pastries, chips, and fried foods. Fat intake should be limited, especially before a workout, as it delays stomach emptying time and takes longer to digest.
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Frequently asked questions
A balanced diet for athletes is similar to the recommended diet for the general public, with a focus on whole grains, fruits, vegetables, lean meats, and low-fat dairy products. Athletes may need to increase their energy intake, especially from carbohydrates, and ensure adequate protein and fluid intake.
Carbohydrates are the body's primary source of energy during exercise. Athletes can increase their glycogen stores by consuming high-carbohydrate foods, such as whole grains, fruits, vegetables, and leafy greens.
Protein is essential for muscle growth and repair. Good sources of protein include fish, lean meats, poultry, eggs, dairy, nuts, soy, and peanut butter. However, excessive protein intake is not necessary, and a well-planned diet should provide sufficient protein.
It is important to consult with a registered dietitian or a trusted health professional to determine the right diet for your specific needs. They can help you create a plan that ensures you are getting enough vitamins, minerals, and other essential nutrients while considering your sport, age, and training regimen.
Fluids, especially water, are crucial for athletes to maintain hydration and regulate body temperature. The amount of fluid intake depends on the environmental temperature, humidity, and the intensity of the exercise. It is important to drink fluids regularly, both before and after exercise, to optimize performance and prevent dehydration.
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