What are the best diets when training for a Triathlon?

What are the best diets when training for a Triathlon?

When you’re training for a triathlon, it's crucial to have a balanced and nutritious diet to fuel your body and support your training. In general, the best diets for triathlons consist of a combination of carbohydrates, protein, healthy fats, and, of course, hydration, so let’s break it up and see why and when we need these foods..

Triathlon Diet Definitions: 

  • Protein - Protein is a macro nutrient that is essential for the growth, repair, and maintenance of tissues in the body. It is made up of chains of amino acids, and is a crucial component of muscle, skin, hair, and other tissues, in this context protein helps with the recovery of muscles after training sessions.
  • Carbohydrates - Carbohydrates are a type of macro nutrient that the body uses as a primary source of energy. They are found in a variety of foods, including grains, fruits, vegetables, and sweets. Carbohydrates are broken down into glucose, which is then used by the body for energy.
  • Healthy Fats - Healthy fats are a type of unsaturated fat that provide a variety of health benefits. They are found in foods such as avocados, nuts, seeds, olive oil, and fatty fish like salmon. Unlike unhealthy saturated fats, healthy fats do not raise cholesterol levels and have been linked to improved heart health, reduced inflammation, and better brain function.

best triathlon diets

Carbohydrates in a Triathletes Training Diet

Carbohydrates for triathletes & triathlon training are an essential energy source for endurance athletes and should make up the majority of your diet, especially in the days leading up to the event. The best ‘carbs’ for triathlon training are whole grain bread, pasta, rice, fruits, and vegetables, these are all good sources of carbohydrates. Additionally, incorporating sports drinks and gels that contain carbohydrates during long training sessions and the race can help you maintain your vital energy levels.

Carbohydrates are a crucial component of a triathlete's diet because they are the primary source of energy for endurance sports like triathlons, if you don’t have the right fuel for your body you can’t perform at a high-level. The body converts carbohydrates into glucose, which is used as fuel for the muscles during exercise. In laymens terms, the more intense the exercise, the more carbohydrates the body needs to keep the muscles functioning.

During a triathlon, the body uses a significant amount of energy, because of course you’ll be swimming, biking, and running in your race. To ensure adequate energy levels, it's important to consume enough carbohydrates leading up to the event and during the race itself. In the days leading up to the race, it's recommended to consume more carbohydrates to ‘top off’ glycogen stores, which are the body's stored form of glucose.

Carbohydrates are also essential for mental focus and endurance during a triathlon. Glucose is the primary fuel source for the brain, and low levels of glucose can lead to decreased mental focus, fatigue, and decreased physical performance. By consuming enough carbohydrates, triathletes can ensure they have enough energy to maintain mental focus and endurance during the entire race.

Protein in a Triathletes Training Diet

Protein is essential for muscle repair and recovery after intense training sessions. The best foods to source protein include chicken, fish, lean beef, dairy and eggs. It's recommended to have a serving of protein with each meal along with carbs and healthy fats. Eating the appropriate meals after a training session to support muscle recovery is essential. During exercise, muscle fibres are broken down, and adequate protein intake is necessary to help the body repair and rebuild these fibres, leading to improved strength and endurance.

Alongside its role in muscle repair, protein also helps to maintain and build lean muscle mass. This is especially important for triathletes, who need to maintain a balance of strength and endurance for the race. Consuming enough protein can help to maintain lean muscle mass and support overall athletic performance.

It's recommended that triathletes aim to consume between 1 - 2 grams of protein per kilogram of body weight per day, with a focus on high-quality protein sources such as chicken, fish, lean beef, dairy and eggs. It's also important to consume protein soon after a training session to support muscle recovery and adaptation.

Healthy Fats in a Triathlon Training Diet

Healthy fats such as avocados, nuts, seeds, and olive oil, help regulate hormones and support the immune system. These should make up a smaller portion of your diet but still play an important role in a balanced diet when training for a triathlon.

Healthy fats are an important part of a triathlete's diet as they provide a variety of benefits for athletic performance and overall health. Fats are a slow-burning fuel source that provide sustained energy during exercise and can help to delay fatigue during a triathlon. This can be especially beneficial during the latter stages of a triathlon when glycogen stores are depleted and the body needs a steady source of energy to maintain performance.

Healthy fats also play a crucial role in hormone regulation and immune function. They support the production of hormones such as testosterone and oestrogen, which are important for athletic performance, and help to regulate the immune system to reduce the risk of illness and injury.

Healthy fats can be found in a variety of foods, including olive oil, avocados, nuts, seeds, and fatty fish like salmon. It's recommended that triathletes aim to consume between 20-30% of their daily calories from healthy fats.

Hydration in a Triathletes Training Diet

Hydration is also a critical factor in triathlon training. It's important to stay properly hydrated before, during, and after training sessions and the race. Aim to drink at least 8 glasses (2 litres) of water a day and even more on days when you're training. Sports drinks are beneficial to drink as they contain electrolytes that can help replace the sodium and potassium lost through sweat during training and competition, whilst also hydrating you - but you should still aim to drink the same amount of water above.

Water is an essential nutrient for triathletes, as proper hydration is critical for athletic performance and overall health. During a triathlon, the body loses water through sweating, which can lead to dehydration and negatively impact athletic performance. Dehydration can cause decreased endurance, decreased mental focus, and increased risk of injury.

To maintain proper hydration levels, it's important for triathletes to consume enough water before, during, and after training and competition. It's recommended to drink around 20 ounces (half a litre) of water 2-3 hours before a race and around 10 ounces (quarter of a litre) every 10-20 minutes during the race. After the race, it's important to rehydrate with water or a sports drink to replace lost fluids and replenish electrolytes.

triathlon training hydration

How Much Food Should You Have in a Triathlon Training Diet?

It's also important to pay attention to portion control and to limit processed and junk food. Incorporating a variety of colourful fruits and vegetables into your diet can provide essential vitamins, minerals, and antioxidants to support your training, it is always better to eat the vegetables with meals instead or alongside vitamin tablets.

It is essential that you listen to your body and be flexible with your diet. Some days, you may need more carbohydrates to support intense training sessions, while other days you may need more protein to support muscle recovery. Pay attention to how different foods make you feel and adjust your diet accordingly.

If you are training for a triathlon, make sure you follow a good diet and listen to your body, but finally, enjoy it, enjoy the journey and the triathlon!

Back to blog