Marathon and Half Marathon Race Nutrition

Developing a strategic fuelling strategy and plan is essential for running your best half marathon or marathon. While sub-optimal fuelling might prove adequate for shorter, slower training runs, it can often be the factor which turns a great race into a disaster from the 10km point of the race. 

The biggest mistake people make is failing to practice their exact pre-race and in-race fuelling strategy before their event. Like any performance, you should have a complete dress rehearsal before the event. For runners this means trialling clothing, accessories, and fuelling strategies on your training runs.

1.   WHAT TO EAT AND DRINK BEFORE YOUR RUN

Start properly hydrated, a good sign is pale, straw coloured pee.

On race day and also on your long run training daysthe food you eat and drink before exercising will help you to:
• Fuel and hydrate your body for the session
• Allowing you to train harder for longer
• Avoid getting hungry during the session
 
Ideally you should aim to have a meal 3-4 hours before your workout or a small snack 1-2 hours beforehand.  Everyone is different with what they like to eat and what agrees with their stomach but in general, your pre-exercise meal or snack should be:
• Rich in carbohydrates to top-up your fuel stores
• Low in fibre, especially if you have a sensitive tummy
• Easy to digest– avoid foods overly high in fat as these are slow to digest
 
Some of my favourite options are:

  • a small bowl of wholegrain cereal or oats with yoghurt and fruit

  • sourdough toast with sliced banana and nut butter

  • Raisin toast with honey

  • Fruit smoothie

2.   WHAT TO EAT AND DRINK DURING YOUR RUN

Your body has enough glycogen stored to fuel you for exercise sessions of up to 75 minutes or so without sports drinks or gels so for shorter sessions you can just concentrate on hydration.  Water is usually sufficient, however if you end up with a post exercise headache you could try nuun tablets to replace lost electrolyes.

For runs or races over 75 minutes runners should aim to consume at least 30g, and as much as 90g, of carbohydrate per hour, and fuelling should commence within the first hour of the race (usually at around the 7km mark) whether the runner feels like it is required or not.   Carbohydrate intake can be maximised through: 

1   Using multiple carbohydrate sources including fluids, gels, bars, chews and even non-sports specific foods. 

2   “Training your gut” to accept more carbohydrate by practicing fuelling on all training runs longer than 14km. 

3   Scheduling your carbohydrate intake so that it is adequate and not forgotten. 

 

FUELLING OPTIONS - GELS, CHEWS, SPORTS DRINKS

Gels, chews and hydration / sports drinks are the main sports specific fuelling options available to use during your run, and each has their advantages and disadvantages. There is no best option, or best gel, to use, and the best product for you to use is largely dependent on what you like, and what you can stomach.

GELS

Popular gel brands include Endura, Gu, Hammer, Clif and SIS but there many other brands out there too. Gels vary in texture and taste, with some being thicker than others. Gels are a good fuelling option as they contain a lot of carbohydrate in a small volume of food and don't require chewing, however, some people struggle with their texture and they may cause stomach upset. Trial and error is the only way to determine which gel is going to work for you.

sports gels.png

CHEWS

Chews are what their name implies, small lolly sized chew with a gum or jelly baby type texture. The advantages of chews is that they provide a more palatable source of fuel. However, some people don't like to chew while running, and you would have to eat at least a half a pack of chews to ingest the same amount of carbohydrate found in a gel. These can be a great option for long slow runs or hikes where you intend on walking some of your distance.

sports chews.png

SPORTS DRINKS

Liquid fuelling options range from the stock standard sports drinks such as Gatorade, to more running specific products such as Endura, Tailwind, Pure, or Torq. Sports drinks are important to include as part of your fuelling strategy as they serve a double purpose or hydrating and fuelling at the same time. As with other fuelling products, it is a matter of trial and error to find the brand and flavour that will work for you.  You need to ensure you are consuming enough of them to cover your 30g carbohydrate per hour.

OTHER OPTIONS

Some people prefer to fuel on energy bars that are almost like a muesli bar (such a Winners or Clif brand) while others prefer to use more natural food options such as dates, or baby food pouches. These may have the advantage of being gentler on the stomach, but they often do not contain the same level of carbohydrate as sports specific products.

UPSET GUT?

If you’re following a low FODMAP diet to manage your IBS symptoms you’ll need to think about low FODMAP sports supplements. This article can help you out

PRACTICING YOUR RACE FUELLING

·  Trialling all your fuelling products during your training is essential. Both sports specific fuelling products and every day foods may cause digestive discomfort, nausea or the need to run to the bathroom. You want to discover which products disagree with you on your training runs, not during your race.  

·   If possible, find out what products are available at the aid stations during your race, and use those in your training to see if they agree with you. If you are planning to get your nutrition from the drinks at the aid stations bear in mind how much you are actually going to drink.  One cup contains 80ml which will only have about 6 grams of carbs depending on the sports drink provided. 

·       Sports gels should be taken with water not with a sports drink - otherwise the concentrated sugar mix may cause GI issues.

·       Consider if you want to consume caffeine during your race, and trial it to make sure the source from which you obtain it (gel, chews, fluids, or tablets) agrees with you. Caffeine is a proven performance enhancing supplement due to its’ benefit on perceived time to exertion and physiological effects.  However, for some people caffeine can cause an increased heart rate, anxiety, sleep disturbances and gastrointestinal upset.

·       About 4-6 weeks out from your target event have a trial nutrition run.  Eat your pre- long run dinner, your pre-long run breakfast and take your gels/chomps just as you plan to in your target event.  It's also a good time to trial your outfit and shoes.  Now is the time to come up with a plan that works for you.

 3.  AFTER YOUR RUN

The goals of the recovery nutrition are to:

  • Refuel and rehydrate the body

  • Promote muscle repair and growth

  • Boost adaptation from the training session

  • Support the immune function

 Rehydrating should begin soon after finishing your run.  The body is most effective at replacing carbohydrate and promoting muscle repair and growth in the first hour after exercise, however repair will continue over the next 12-24 hours. You could use your next regular meal after your run as your recovery nutrition or have a small snack soon after exercise to kick-start the recovery process followed by your next main meal to complete your recovery.
 
Post workout foods should be:

·       Rich in quality carbohydrate to replenish muscle fuel stores

·       Contain some lean protein to promote muscle repair

·       Include a source of fluid and electrolytes to rehydrate effectively

 

 There’s no “best” option for what to eat after exercise. Dairy foods such as flavoured milk, smoothies or fruit yoghurt can be a great option as they can provide carbohydrate, protein, fluid and electrolytes ticking all of your recovery goals in one handy option. Some other options that you may like to choose include:

·  Lean chicken and salad roll

·  Bowl of muesli with yoghurt and berries

·  My favourite – an egg with wholemeal toast soldiers

·  Fruit smoothie- make this up the night before and have it on your way to work. 

4. CARB LOADING

The body only has a limited supply of carbohydrate in the muscles and liver. Since carbohydrate is main source of fuel for the body during high intensity exercise, muscle fuel stores should be topped over in the 24-36 hours before competition to enhance performance. 

In the few days before your race carbohydrate loading will make a big impact. Carb loading isn’t about a big bowl of pasta the night before your event – instead it focuses on replacing protein, fibre and fat with carbohydrate sources. You should be targeting between 8-12 grams of carbohydrate per kilo of body weight over the carb load period. So a 60 kg runner would need to consume between 480 and 720 grams of carbs over the day. As a guide 2 slices of white toast contain about 50 grams of carbs. If it’s your first time carb loading I’d suggest sticking to the lower end of the range. 

The carbs you choose should be low in fibre to reduce the chances of getting an upset stomach during the race. This is the time to choose white bread, rice or pasta over wholemeal. You can go back to your quinoa after the event. You can also enjoy some of the foods you might not normally eat such as a crumpet with honey. 

Here’s some detailed guidance including a meal plan covering carbohydrate loading: 

http://racheleagleton.com.au/blog/carbohydrate-loading-for-endurance-events 

Are you training for an endurance event?  Did you know that using a scientific approach to nutrition in a marathon takes, on average, nearly 11 minutes OFF an amateur runner's finish time?  My 8 week Endurance Nutrition program focuses on supporting your marathon training with making nutritious food choices a priority so that you can get to the start line feeling great.  On race day you will be armed with well trialled strategies that work for you and will help you run your best fuelled marathon, half marathon or triathlon.

ABOUT ME

Need help sticking to your healthy eating goals or to fuel your athletic performance?   Let me help you – I’m a university qualified nutritionist based in Sydney, NSW. I am also a busy working mum of two teenagers, so am practical and realistic with my advice. Find out more about me here: 

Sources: Sports Dietitians Australia, Australian Institute of Sport