By Stephanie Ede
4 min read
Having just qualified as 3rd overall female for the Ironman 70.3 World Champs, her long term sights are set on the full Ironman World Championships in Kona.
If you're looking to up your running mileage or beat your PB it's important to fuel your body properly before, during, and after your run to ensure you're running at your best. I’m going to share some of my advice on how best to fuel your muscles to keep you running further, faster and for longer.
Pre-Run Nutrition
What you eat before you hit the road or the treadmill all depends on when you’re running and what kind of run you’re planning. Many people don’t have the time, or the stomach to eat and digest food before a workout, especially if it’s taking place in the early morning. As a general rule of thumb, I have a small snack 1-2 hours before a short run (less than an hour) and a larger snack or small breakfast before longer runs or a run later on in the day. A pre-exercise snack of 100-300 calories is plenty for runs of up to 1 hour.
Small Snack Examples:
A banana
A smoothie
An energy gel with water
An energy bar
For longer runs, or if you run later in the day, aim to consume 300-500 calories 1 to 2 hours before. Long lasting breakfast combinations will be rich in complex carbohydrates, have a small amount of protein and a little healthy fat, ensuring you have everything you need to keep you ticking along.
Larger Snacks or Breakfast Examples:
Porridge with fruit compote or honey
Muesli with Greek yogurt
Toast with peanut butter and banana
Running and stomach issues
I don’t believe anyone who says they’ve never experienced any kind of stomach issues when out running! Even the most experienced runners get eating wrong and end up with those dreaded issues whilst out on a training run or even worse, during a race. We just can’t predict exactly what our bodies will do and when. Studies have shown that 30 - 90% of endurance athletes suffer from some form of stomach/bowel distress, with the percent increasing with longer distances. What can we do to avoid those on-the-go gastrointestinal complaints?
Avoid certain foods pre-run
Although pre-run foods should be high in carbohydrates avoid any that make you feel full or heavy and in particular, in the 2 to 4 hours before your run, avoid the following foods known to cause gastrointestinal distress.
High fibre foods for several days before your event
Excessively fatty foods
Spicy food
Too much caffeine
Alcohol
Foods high in fructose, particularly sports drinks that are sweetened with only fructose. (Somewhat paradoxically, drinks that contain some fructose along with other sweeteners such as glucose appear to be less troublesome).
Get a routine going
Practice, practice and practice again. If you’ve had problems in the past, practice new nutrition strategies, both pre-event and while running to see what works for you.
Less is more
Despite what you might think, you can have too many calories on race day. Remember that it's always easier to add more calories, but not so easy to "remove" them when running!
Liquid only
Whether it's a drink or a drink mix or a gel, liquid calories are far easier for you to consume and process whilst running under race day stress.
Get gear
My go-to nutrition brand - Science in Sport
Pre-run
To start I have 500ml of Hydro (Berry) every morning when I wake up. Why? It gives me the kick start and boost I need first thing in the morning and fills my body with added electrolytes ready for my training session. It also tastes great which makes me gulp it down quicker than water!
Pre and post runs I have trialled using Beta Fuel along with GO Electrolyte drink which I use to fuel much longer runs. I find these provide ample amount of carbohydrates, taste great and are a good way to take on board fuel to prepare for a heavy training day or a big race (marathon or long distance multi-sport race e.g. a triathlon).
During
Personally, I take on a Energy Gel around every 8km. The amount fluctuates with pace and total run distance, but without fail I always get some fuel on board around that mileage. However, I would not take a gel on a 10 or 12k run for example, I reserve gels for the runs over 90 mins. Flavours wise, I love the fruit salad or vanilla and berry with added caffeine at the later stage of the run – it works a treat! These flavours sit well with my stomach, but I like to mix them up as there are so many delicious ones!
Recovery
As an Ambassador for Science In Sport I have been using REGO and the Protein 20 bars for the last 4 months now and believe they help me recover quicker and also give the best blend of carbs and protein.
I always prepare REGO in advance as timing is critical for me. At the track, it’ll be in a sachet in my bag. If I am running from home, I’ll mix it up in advance and pop it into the fridge so I can consume it as I get through the door. Maximising recovery is a key part of my training. REGO aids the recovery process so that you can come back stronger, ready to go again. There are a good variety of flavours but my personal favourite is chocolate orange.
I also love the taste of the Protein 20 bars. These provide an added energy boost before a session or are a perfect snack during the day. They are low in sugar and really high in protein (20g) so tick all of the boxes. My favourite flavour is chocolate peanut crunch.
I stand by the range of SiS products that I use, they work for me and my requirements and really help fuel my training.
Get inspired
Home-made is also cheap and easy
When you have some spare time (which is not very often if you are anything like me!) making your own energy snacks is a great way to save money and make sure you know exactly what you are eating. One of my favourite recipes is actually specific for cyclists, however it can definitely be used by runners too. These rice cakes are a Great Britain Cycling Team staple and provides a perfect fuel for endurance sports and have been proven on the world’s toughest bike races.
Latest articles
The Challenges Women Face in Running and How It Impacts Participation
Running is often lauded as one of the most accessible sports—just lace up your trainers and go. However, for many women, the barriers to participation go far beyond the logistical. While safety concerns are frequently highlighted, deeper systemic issues like access to the sport and unequal treatment are also preventing more women from running. It was a topic keenly discussed at our In Her Stride panel held at the end of November, with key members of the female running community including Sophie Power, Tasha Thompson, Rehana Mawani and Emily Shane.
Running is often lauded as one of the most accessible sports—just lace up your trainers and go. However, for many women, the barriers to participation go far beyond the logistical. While safety concerns are frequently highlighted, deeper systemic issues like access to the sport and unequal treatment are also preventing more women from running. It was a topic keenly discussed at our In Her Stride panel held at the end of November, with key members of the female running community including Sophie Power, Tasha Thompson, Rehana Mawani and Emily Shane.
Before we kick things off however, we should highlight that female participation in running events is growing, and this is a great thing! According to data from Let’s Do This, women in their 20s are the fastest-growing demographic in event participation this year. However despite this, women are still 16% less likely to run every week compared to men. This disparity is particularly striking given that women report higher levels of personal benefits from running, such as improved fitness, better sleep, and reduced stress.
The reasons for this are complex and personal, however we have broken down three key challenges discussed during our panel and the solutions explored that could help address them.
1. The Pressure of Pace
One of the biggest hurdles for many women is the pressure to run faster. Despite the average UK woman’s running speed of 06:37 min/km (according to Strava), most run clubs don’t cater to this with the slowest pace often around 6 minutes per km. Add to this the relentless focus on personal bests and fast times on social media, and it’s no surprise that many women feel too intimidated to join in.
Thankfully, there are starting to be more people rebelling against this speed obsession, including our panelist, Emily Shane. Emily has been leading the charge to encourage more women to disregard pace and focus on the experience of running to drive uptake amongst women. Initiatives like events without cutoff times and more inclusive pace groups at running clubs are vital to creating a more welcoming environment and broadening the benefits of running to the experience and community.
2. Perception of Sport in Schools
One of the topics hotly discussed was how for many girls, the barriers to enjoying physical activity start at school. Puberty, coupled with changing bodies and fluctuating emotions, can make sports feel daunting and uncomfortable for teenage girls. Research highlights this disparity: only 38% of girls enjoy sport and exercise compared to 53% of boys, and just 26% of girls feel confident in physical activity versus 43% of boys.
The panel emphasised the need to address this such as:
- Introducing a wider variety of sports and fitness activities to cater to different interests
- Providing more supportive and confidence-boosting PE kits.
- Showcasing more female role models in sport to inspire young girls.
By addressing these issues at the school level, we can foster a love of sport that lasts into adulthood.
3. Treatment at Events
This is a topic that panelist Sophie Power, founder of SheRACES is incredibly knowledgeable and passionate about. Even at organised running events, women often experience unequal treatment. From “unisex: t-shirts (which are actually designed for men) to a lack of sanitary products in portaloos, these "small things" can collectively make women feel like an afterthought. Prize money inequality and rigid event policies—like no deferral options for pregnant or postpartum women—further highlight these disparities.
Thankfully, initiatives like the 50:50 campaign by Threshold (a campaign to get 50% of women at Ultra startlines vs. the current average of 30%) and the advocacy work of SheRACES are driving change, and there are many amazing event organisers such as Maverick, Threshold, Why We Run and many more, that are working hard to make their events are inclusive as possible for women.
Despite these challenges, the panel and attendees felt overwhelmingly optimistic about the future of running for women and the benefits it brings us. Progress is being made, however we all need to add our voices to the conversation to help more women get into the sport and reap the benefits.
Some Helpful Resources
Here are a few helpful resources. This list isn’t exhaustive by any means, however is a good starting point for those looking for inspiration on where to start.
Female friendly events:
- Threshold Events
- London Landmarks Half Marathon
- Maverick Events
- Why We Run
- Women Run Series London 2025
Female Only Run Clubs
From Radio to Race Day: Hattie Pearson’s Path to Endurance Event Glory
Hattie Pearson is the type of person who doesn’t just dabble in fitness (or most things…!) She dives in headfirst, often with no hand-holding (except, perhaps, metaphorically). From her first triathlon in 2021 to a series of jaw-dropping endurance feats in 2024, she’s been redefining what’s possible with determination, community, and a big ‘YES’ attitude.
Hattie Pearson is the type of person who doesn’t just dabble in fitness (or most things…!) She dives in headfirst, often with no hand-holding (except, perhaps, metaphorically). From her first triathlon in 2021 to a series of jaw-dropping endurance feats in 2024, she’s been redefining what’s possible with determination, community, and a big ‘YES’ attitude.
Just say YES
Hattie’s ‘yes’ streak started when a friend and her decided to do a sprint triathlon together. “We had such a great time,” Hattie recalls, “and I was like, I want to do more of this.” That spark quickly turned into a blaze of ambition. By the following year, she was competing in Outlaw triathlons and even signing up for a full-distance Ironman—before completing her first half-distance event. “I didn’t give myself the choice to not carry on,” she says.
The Power of Community
For Hattie, discovering the 10IronWomen network—a group committed to gender parity in triathlons—was a game-changer. “It’s amazing to see a community encouraging women and non-binary folk to show up,” she explains. “Seeing others doing it made me think, I want to be a part of this.” That sense of solidarity and shared purpose has been a recurring theme, whether she’s lacing up for a winter triathlon in the Alps or a grueling ultra-marathon closer to home.
A Year of Big Goals
This year, Hattie set herself a dizzying list of challenges. She swam 500 kilometers (yep, that’s half a million meters!) and tackled a range of events, including a winter triathlon complete with ski touring, the Étape du Tour cycling challenge, and her first ultra-marathon. Each was hard in its own way—whether it was battling snowy trails with crampons or smashing out seven-and-a-half-minute miles for 13.1 miles. But for Hattie, the difficulty is the point. “Every time I achieve something I thought was impossible, I remind myself: I can do hard things.”
Balance and Burnout
With goals that ambitious, fitting it all in can be a challenge. Early mornings help. “I’m one of those people who can get up at 5:00 a.m,” Hattie admits, however it also takes a lot of discipline. With her work on Hits Radio starting later in the day, she carves out time for training, dog walks, and the occasional tantrum over broken goggles. “I’ve definitely had those ‘forgetting-my-swimming-costume’ moments,” she laughs. But her key to staying motivated is simple: keep it fresh and fun. Whether it’s joining her triathlon club for training or trying a completely new event, keeping it fun and different is the secret to staying motivated and on track to reach your goals.
Advice for Aspiring Endurance Athletes
For anyone looking to follow in her footsteps (or strokes), Hattie has this advice:
- Be patient. Results don’t come overnight, and the journey is as important as the destination.
- Stop comparing. “Your journey is completely your own. Social media only shows the highlights,” she reminds us.
- Find your community. Whether it’s a running club, a neighbor for early morning jogs, or an online network, accountability and camaraderie make all the difference.
What’s Next for Hattie?
In 2025, Hattie plans to tackle her first multi-day event, the Monster Triathlon. Admittedly it is as scary as it sounds, kicking off with a 5K swim in Loch Ness, followed by a 1,000-kilometer bike ride to Windsor, and wraps up with a casual 50K run to London(!). Her goals also include more open-water swimming, trail running, and maybe—just maybe—an even bigger endurance challenge. (Though definitely not swimming the English Channel: “No way am I swimming through jellyfish without a wetsuit!”)
Hattie Pearson’s journey is more than a personal triumph. It’s a testament to the power of showing up, saying yes, and proving that with the right mindset, anything is possible. Whether you’re tackling your first 5K or dreaming of an ultra-marathon, Hattie’s story is proof that the finish line is worth the hard miles. And when you cross it? You’ve won your race—medal or not. 🏅
Make your own electrolyte drink
Why spend on expensive sports drinks when you can make a natural, hydrating electrolyte drink right at home? With just a few simple ingredients, you can create a refreshing blend packed with essential minerals and hydration-boosting properties. Perfect for fueling your workout or post-run recovery, this homemade option keeps it natural, affordable, and effective.
Why spend on expensive sports drinks when you can make a natural, hydrating electrolyte drink right at home? With just a few simple ingredients, you can create a refreshing blend packed with essential minerals and hydration-boosting properties. Perfect for fueling your workout or post-run recovery, this homemade option keeps it natural, affordable, and effective.
Ingredients:
- 1 pinch of high-quality sea salt
- Small piece of fresh ginger, peeled
- 500ml coconut water (e.g., Rebel Kitchen)
- Juice of 1 lime
- Fresh mint leaves
Instructions:
- Prepare Salt & Ginger: Add a pinch of sea salt and the peeled ginger to a blender.
- Add Coconut Water & Lime: Pour in the coconut water, squeeze in the lime juice, and add a few mint leaves.
- Blend & Serve: Blend until smooth, pour into a glass, and garnish with extra mint. Enjoy your refreshing, hydrating drink!
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