Best Energy Bars for a Marathon

When you are preparing for 26.2 miles, fuelling is everything. While gels often take centre stage, energy bars can play a valuable role in both marathon training and race day, especially in the earlier miles when intensity is lower and your stomach is more tolerant.

Energy bars offer a more substantial texture, steady carbohydrate release and, in some cases, additional nutrients that support endurance. The key is choosing bars that are easy to digest, provide sufficient carbohydrate and fit into your overall fuelling strategy.

Why Use Energy Bars in a Marathon?

Energy bars can be particularly useful:

• Before the race as part of your pre-run meal
• In the early stages of a marathon when pace is controlled
• During long training runs where you want more variety than gels
• As a recovery snack immediately after finishing

Look for bars that prioritise carbohydrate, avoid excessive fat and fibre, and are made from quality ingredients that sit well with your stomach.

How to Use Energy Bars in Your Marathon Plan

Energy bars are often best used strategically rather than as your sole fuel source.

A simple approach could be:

• Eat a bar two to three hours before the start as part of your pre-race meal
• Use a bar in the first half of the marathon if intensity allows
• Switch to gels or chews later when chewing becomes less practical
• Keep one on hand for immediate post-race recovery

As always, practise your strategy in long runs. Marathon day is not the time to test a new product.

Here are some great bar options for your next marathon:

226ERS Race Day Choco Bits

226ERS Race Day Choco Bits are naturally formulated to support endurance athletes with sustained, clean energy. Made from 100% natural ingredients including figs, almonds, dates, raisins and cocoa, they deliver a rich, satisfying taste without relying on added sugars, syrups or artificial flavourings.

Each bar provides over 130 kcal and around 25g of easily absorbed carbohydrates, making it a practical option before the start line or during the earlier miles of a marathon.

Veloforte Energy Bars

Veloforte Energy Bars blend traditional craftsmanship with modern performance nutrition. Inspired by a classic Italian fortifier and rooted in a cherished family recipe, these bars offer natural energy in a genuinely enjoyable format.

Made with real fruits, nuts and spices, they provide dual-source carbohydrates for balanced, sustained fuel. They also include essential proteins to support endurance and recovery, making them versatile for both pre-race fuelling and post-run replenishment.

Luchos Guava Energy Blocks

Luchos Guava Energy Blocks are a refreshing, natural alternative to conventional energy bars and gels. Inspired by Colombian heritage and developed with endurance athletes in mind, they are made from pure guava paste with a touch of sugar.

With slow-release sugars, they provide sustained energy without sharp spikes or crashes. Their high dietary fibre content supports digestion and satiety, making them particularly useful in training runs or as a pre-race snack.

FAQs

Are energy bars practical during a marathon?

Yes, particularly in the early stages when intensity is lower. Many runners switch to gels later in the race.

How much carbohydrate should an energy bar provide?

For marathon use, look for around 30 to 40g of carbohydrate per bar to meaningfully contribute to your hourly target.

Can I rely only on bars for a marathon?

It depends on your tolerance and pace. Many runners combine bars with gels or chews to meet higher carbohydrate targets comfortably.

Summary

Energy bars can be a valuable part of your marathon fuelling strategy, offering sustained carbohydrate, natural ingredients and a more satisfying texture than gels alone.

The right option will depend on your pace, tolerance and personal taste. Test them in training, build confidence in your approach and head into race day with a plan that supports steady, reliable energy from start to finish.

You can use our Nutrition Calculator to work out exactly how many bars you need for your next event, taking the guesswork out of fuelling.