Leena Watts
Nutrition is an important aspect of athletic performance and overall health. Athletes need to consume a balanced diet that includes a variety of nutrients to support their rigorous training and performance demands. This includes an adequate intake of macronutrients such as carbohydrates, protein, and fats, as well as micronutrients like vitamins and minerals. Proper nutrition helps athletes maintain their energy levels, build and repair muscles, support their immune system, and optimize their training and recovery processes. Additionally, hydration plays a crucial role in athletic performance, with water being the primary choice for hydration, and sports drinks being recommended for intense or prolonged exercise.
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What You'll Learn
Carbohydrates for fuel
Carbohydrates are a major source of fuel for athletes. They provide the body with energy, which is especially important for athletes as they burn through their energy stores faster than the average person. Carbohydrates are broken down into sugars, primarily glucose, which is the body's primary energy source.
Athletes who exercise strenuously for more than 60 to 90 minutes a day may need to increase their energy intake, particularly from carbohydrate sources. Carbohydrate feedings before exercise can help restore glycogen stores, which may be called upon during prolonged training and high-intensity competition. Carbohydrates ingested during exercise are known as 'exogenous' fuel, providing extra energy while the athlete is performing.
The amount of carbohydrates an athlete should consume depends on the duration, frequency, and intensity of the exercise. For moderate exercise, lasting around one hour, athletes should consume 5-7g/kg BW/d of carbohydrates. For exercise lasting between one and two hours, athletes can benefit from consuming 30-60g of simple carbs per hour. This can be in the form of a standard isotonic energy drink or energy gels. For exercise lasting longer than two hours, athletes can benefit from higher intakes of 60-90g of carbohydrates per hour.
Good sources of carbohydrates include fruits, vegetables, and grains. Whole grains such as brown rice, oatmeal, and whole-wheat bread are preferable to processed options like white rice and white bread as they provide the energy athletes need, along with fibre and other nutrients.
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Protein for muscle growth and repair
Athletes require a well-planned, nutritious diet to meet their vitamin and mineral needs and support muscle growth and repair. While it is a myth that athletes need a high daily intake of protein to build large, strong muscles, protein is indeed an essential part of a training diet. Protein provides amino acids, which act as building blocks for the body, helping to repair and rebuild muscle cells damaged during exercise.
Protein needs are generally met by athletes who consume sufficient energy in their diet. The recommended daily amount of protein for the general public and active people is 0.8 to 1.0 g/kg of body weight. For athletes involved in daily strenuous exercise, the recommended amount is slightly higher, ranging from 1.0 to 2.0 g/kg of body weight. For example, a 60 kg person should consume around 45 to 60 g of protein daily, while someone exercising for over an hour a day may need up to 120 g.
Protein-rich foods such as fish, lean meats, poultry, eggs, dairy, nuts, soy, and peanut butter are good sources to include in an athlete's diet. Consuming protein within 30 minutes after a workout is ideal for muscle repair and growth. This is because the body breaks down muscle tissue to meet its energy needs when dietary protein intake is insufficient, which can increase the risk of infections and illness.
It is worth noting that athletes in sports with a focus on weight, such as wrestling, swimming, dance, or gymnastics, may feel pressured to lose weight. However, it is crucial to work with a dietitian to ensure that health and performance are not compromised during weight management.
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Vitamins and minerals
A well-balanced diet is essential for athletes to perform at their best. Vitamins and minerals are key components of a nutritious diet, and athletes should ensure they are getting enough of these to support their health and performance.
Calcium and iron are two particularly important minerals for athletes. Calcium helps to build and protect bones, reducing the risk of stress fractures. Dairy foods such as low-fat milk, yoghurt and cheese are good sources of calcium. Iron carries oxygen to muscles, and athletes should eat iron-rich foods such as lean meat, fish, poultry, leafy green vegetables and iron-fortified cereals. Adolescents, especially females, are at a higher risk of iron depletion and should be screened regularly.
It is important to note that athletes should generally follow a balanced diet similar to that recommended for the general public, with a focus on whole foods and a variety of nutrients. Sports nutrition plans should be tailored to the individual, taking into account their specific sport, goals, and preferences.
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Water and hydration
Athletes have specific nutritional requirements to support their physical performance and recovery. One of the most crucial, yet often overlooked, aspects of an athlete's diet is proper hydration. Water plays a vital role in an athlete's body function and performance, and ensuring adequate hydration can significantly impact an athlete's health and performance outcomes.
Water is essential for regulating body temperature, transporting nutrients and oxygen to working muscles, removing waste products, and lubricating joints. Even a small amount of dehydration can impair an athlete's strength, power, and endurance, as well as their ability to concentrate and make decisions. Therefore, athletes need to ensure they are taking in an adequate amount of fluids before, during, and after training or competition.
The amount of water an athlete needs can vary depending on several factors, including the climate they are performing in, their level of exertion, their body size, and their individual sweat rate. As a general guideline, athletes should aim to consume around 2.7 to 3.7 liters of fluid per day as a baseline, and then adjust according to their specific needs. For example, athletes performing in hot and humid conditions will likely need to increase their fluid intake to account for greater sweat loss. It is also important to consider that athletes who are larger or those who sweat more profusely may require greater fluid intake to stay properly hydrated.
Proper hydration begins well before the actual physical activity. Athletes should aim to hydrate optimally in the 24 hours leading up to their event or training session. This means drinking fluids at regular intervals throughout the day and ensuring that they are well-hydrated before any significant fluid losses occur. During exercise, athletes should have a hydration plan that includes drinking at regular intervals, regardless of their thirst. Thirst is not always a reliable indicator of hydration status, as it can be influenced by factors such as an athlete's focus on performance or the suppression of thirst signals during intense exercise. Therefore, athletes should have a strategy that includes drinking a set amount of fluid at specific times, such as every 15 or 20 minutes, to ensure they are staying on top of their hydration needs. Post-exercise, it is crucial to replenish any fluid losses to support recovery. For every pound of body weight lost during exercise, athletes should aim to consume 2-3 cups of fluid. Including sources of electrolytes in the post-exercise meal or snack can also aid in rehydration and support the body's fluid balance.
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Calories for energy
Calories are essential for athletes to maintain their weight and achieve peak performance. Athletes who don't consume enough calories may experience a breakdown of muscles instead of muscle growth. They may also become weaker and slower than they would have been if they had consumed an adequate number of calories.
Athletes have higher energy demands than the average person due to their increased physical activity. Therefore, they need to consume more calories to fuel their sports performance and, in the case of teenagers, their growth. The number of extra calories needed varies depending on the athlete's age, activity level, growth rate, and stage of physical maturity. For example, a 30 kg girl playing soccer for 60 minutes would expend around 270 calories, while a 60 kg boy playing ice hockey for the same duration would expend about 936 calories.
Carbohydrates are the most important fuel source for athletes as they provide glucose, the body's primary energy source. Athletes should ensure that their diet includes sufficient carbohydrates to fuel their bodies. Good sources of carbohydrates include fruits, vegetables, and grains, with a preference for whole grains like brown rice, oatmeal, and whole-wheat bread over processed options. These whole grain options provide the necessary energy while also supplying fiber and other nutrients to keep athletes healthy.
While protein is also important for muscle growth and repair, athletes' protein needs are generally met or exceeded through sufficient energy intake in their diet. The amount of protein recommended for athletes is only slightly higher than that for the general public. For example, a 60 kg person should consume around 45 to 60 grams of protein daily, while someone exercising daily for 45 to 60 minutes should consume between 1.0 to 1.2 grams of protein per kilogram of body weight.
In addition to calories from food, athletes should also focus on hydration to support their energy levels. Fluids, especially water, are essential for regulating body temperature and replacing fluids lost through sweat during exercise. The amount of fluid required depends on age, size, level of physical activity, and environmental temperature. Athletes should drink before, during, and after exercise and consider sports drinks if exercising for more than 60 to 90 minutes or in hot weather.
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Frequently asked questions
Athletes need more calories in their diet to fuel their performance and growth. Their diet should consist of about 60% carbohydrates, 20% protein and 20% fat.
Good sources of protein include fish, lean meats, poultry, eggs, dairy, nuts, soy, and peanut butter.
Good sources of carbohydrates for athletes include fruits, vegetables, and grains. Athletes should opt for whole grains like brown rice, oatmeal, and whole-wheat bread over processed grains like white rice and white bread.
Iron-rich foods include eggs, leafy green vegetables, fortified whole grains, and lean meat.
There is no set guide for how much water to drink, as it depends on age, size, physical activity level, and environmental temperature. Athletes should drink before, during, and after exercise, and sports drinks may be beneficial for those exercising in very hot weather for more than 60-90 minutes.
