Precision Fuelling for Professionals Who Compete

Is Your Fuelling Keeping Up With Your Ambition?

Personalised, science-led performance nutrition for professionals balancing a demanding career with serious training and competition.

Build the energy to perform at work. Recover from training. Support your health. Arrive at the start line ready to compete.

BRITISH EQUESTRIAN FEDERATION

1:1 Personal Performance Nutrition Coaching
& Fuel Me Academy

Two Ways to Build Your Performance
Choose the depth of personalised support that fits your goals, lifestyle and competitive ambitions.

Personalised Professional 1:1 support

You Train Hard. But Is Your Fuelling Keeping Up?

You invest significant time, discipline and money in your performance. Yet conflicting advice, generic plans and disconnected data can leave you working harder without knowing what is truly holding you back.

Are You Fuelling Backwards?

Early training runs straight into meetings, travel or deadlines. Meals are delayed or missed in pursuit of race weight, only for hunger, fatigue and quick fixes to take over later.

You may be chasing leanness while compromising energy, recovery, body composition and training quality.

Do You Have More Data, but Less Clarity?

You have the watch, training platform, blood results, sleep tracker and supplements, but no clear picture of how they connect.

Is Your Gut Dictating Your Performance?

Cramping, reflux, nausea, bloating or urgent bowel symptoms can disrupt training and undo months of preparation on race day.

Are Work and Training Competing for Your Energy?

Early training, demanding work and late finishes can push nutrition, sleep and recovery down the list. The result can be fatigue, slower recovery, injury and inconsistent performance.

The truth is, generic advice rarely reflects your physiology, training, health and life. At 4th Discipline, we bring those pieces together to identify what is limiting performance and build a personalised strategy around you.

What Could Change if Your Fuelling Finally Worked With You?

Imagine beginning a demanding training session with energy available, not trying to create it halfway through.

Picture moving through the working day with clear thinking, stable energy and the capacity to train again when work finishes.

Visualise arriving at the start line knowing your fuelling, hydration and gut strategy have been tested. You feel calm, prepared and confident rather than questioning every decision.

With the right strategy, you can fuel demanding training, recover more effectively, improve concentration, approach body composition without compromising health, reduce avoidable gut disruption, make informed supplement decisions and identify potential problems before they become performance-limiting.

This is not about fitting more into an already demanding life. It is about making the work you are already doing deliver more.

Why Does Personal Performance Precision Matter?

01

Your Strategy Must Work in Real Life

A demanding career and competitive sport place different but connected demands on your energy, time and recovery. Recreational Ironman athletes have been reported to train around 14 hours per week on average, before work, after work and around family life (Neto et al., 2021). Your strategy must work in real life, not only on paper.
02

Data Is Only Useful When It Changes a Decision

Training metrics, blood biomarkers, food intake, sweat data, body composition, symptoms and recovery patterns can all provide valuable information. But collecting more data does not automatically improve performance. We identify what matters, interpret it in context and turn it into actions you can implement.
03

Discipline Can Sometimes Hide Under-Fuelling

Training hard, eating “cleanly” or pursuing a lower race weight can appear committed. But inadequate energy availability can compromise recovery, adaptation, immunity, bone health, body composition, hormonal function, mood and performance (Mountjoy et al., 2023).
04

Competition Nutrition Must Be Trained

Your gut, carbohydrate intake and hydration strategy should not be left until race week. Gastrointestinal symptoms are common in endurance sport, with research reporting symptoms in around 30–70% of athletes depending on the event and methods used (Costa et al., 2017; Ribichini et al., 2023). DNF rates in Ironman events are commonly reported around 5–10% (Triathlete, 2025).

Meet Claire Fudge

Clinical Dietitian. High-Performance Sports Nutritionist. Nutritional Engineer. Endurance Athlete.

As Clinical Director of 4th Discipline, I bring together more than 23 years of clinical nutrition, elite sport and high-performance fuelling experience.

I work with professional and Olympic-level athletes, elite performance pathways and world-class programmes, collaborating with medical, coaching and sports-science teams to ensure athletes receive the highest level of joined-up care.

As a Registered Clinical Dietitian and High-Performance Sports Nutritionist, I look beyond food alone. I consider the full performance picture: physiology, medical history, training load, recovery, gut health, body composition, energy availability and long-term health.

I also understand the demands personally. As an endurance athlete and business owner, I know what it takes to work hard, train hard and continue performing when time, energy and recovery are under pressure.

That describe myself as a Nutritional Engineer! 



I identify what may be limiting performance, connect the clinical and sporting data, and build a personalised fuelling strategy designed around the athlete, not just giving a generic plan.
The aim is not simply to produce a result at the next competition. It is to build robust, resilient athletes who can perform at a high level now while protecting their health and sporting longevity.

How it Works

Choose the level of support that best fits your goals, lifestyle and competitive ambitions.

1:1 Personal Performance Nutrition Coaching

Understand Where You Are Now

Begin with an in-depth assessment of your nutrition, health, medical history, blood biomarkers, symptoms, training, recovery and relevant performance data to identify what may be limiting progress.

Set Clear Performance Goals

Define a meaningful vision across health, work, training and competition, and then translate them into practical priorities and measurable actions.

Enhance Knowledge and Confidence

Develop the skills to make informed nutrition decisions around training, recovery, travel, body composition, gut health and competition. Cut fact from fiction.

Identify Marginal Gains

Explore the smaller, personalised changes that can improve energy, recovery, resilience and competitive performance.

Test, Review and Adapt

Use regular coaching and professional interpretation to assess what is working, respond to challenges and refine your strategy over time.

Create Lasting Performance Habits

Build routines and systems that support consistency during demanding work periods, heavy training blocks, travel, injury and the off-season.

24:7 Learning Lab access. Gain access to performance guides, recipes, educational videos, and on-demand learning resources.

Fuel Me Academy

Learn From Expert-Led Sessions

Join focused weekly online sessions covering the nutrition, recovery and health topics that matter to professionals who train and compete. Timely sessions focused on the season, addressing challenges and performance enhancers

Turn Knowledge Into Action

Apply practical tools and strategies across work, training, travel, family life and competition rather than simply collecting more information. Specific colleague and family sessions. Dispelling myths and gathering the skills to sort the facts in the media

Stay Accountable

Private group chat, nudges, discussion and structured support to maintain momentum between sessions.

Access Individual Guidance

Receive brief personal check-ins with Claire to clarify priorities, address specific challenges and keep your strategy moving forwards.

Connect With People Who Understand

Learn alongside other driven professionals balancing demanding careers, health, family life and serious sporting ambitions.

Bring Performance Into Real Life

Quarterly in in-person performance days and selected sessions are designed to strengthen implementation within the environments around you, with access to appropriate testing.

24:7 Learning Lab access. Gain access to performance guides, recipes, educational videos, and on-demand learning resources.

Investment starts from £500/month

The performance fueling framework
The performance fuelling frameworkTM
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The work we have done together has covered race day nutrition, everyday nutrition, and has helped me have a better relationship with food. So often we have coaches for the sports we do, yet no guidance or coaching when it comes to nutrition. Working with Claire has really helped up my performance. Thanks to Claire and Fourth Discipline for all the continued support.

~ Allysha Krall Triathlon Coach and USA Pro Triathlete
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“You quite literally changed my life; I could not have done this without you”

~ Charlie R. Business Owner, Entrepreneur, and Ironman and Endurance Age Group Athlete
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In Claire, I have found a dietitian who not only is a specialist in nutrition, but also really understands the specific demands of an athlete. She acknowledges that one size does not fit all and really considers all the different aspects in optimizing nutrition for me as an individual. Most importantly, she helps me understand every little step of the process so that I know how to fuel myself even when she’s not around.

~ Sabrina Stadelmann Economist and Professional Swiss Triathlete
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I’ve been running for quite a few years, but I just kept running out of energy. Training for a marathon, I got in touch with Claire. I thought she would just give me a food plan, but she basically educated me on what I needed to eat and the right food groups to eat together. It was just an absolute game changer. I did my marathon with absolutely no problems—didn’t once run out of energy.

~ Joanne Managing Director and Athlete
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“swam my fastest 100m since I stopped competitive swimming as a kid…. I am feeling great”

~ Marti Business professional and Swimmer
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I felt at the time when I started with Claire that the quality of my life wasn’t very high and I was really struggling to enjoy my training. I certainly wasn’t enjoying food and it’s safe to say that she worked with me every step of the way to transform my life everyday.

~ Laura Business Tech Marketing Professional and Athlete
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“ I could write so much more . Claire has done an amazing job, and been great, provided consistent, caring support along a tough path to improve my nutrition and expert, individualised advice for fuelling (…) Claire is so well informed, not only in sports nutrition and supplements but also (…) in other areas, including sleep; protein, and ageing (in the context of) a healthy balanced nutritious diet to meet daily and training needs. I have learnt so much and feel so much more equipped to fuel”

~ Mary R. Doctor and Ironman Age Group triathlete and Endurance Athlete
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I went to visit Claire for a sweat test. This was really useful and informative experience and Claire is very knowledgeable and helpful.

~ Jeffrey
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I started working with Claire when I realised that I thought I knew what I was doing but I really didn’t when it came to sports nutrition. I’d been competing at an age group level internationally in triathlon and since working together, my performances have improved together with making podium places as well as making the jump up to 70.3 a successful one.

~ Jess Doctor and World-class Ironman athlete
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I really enjoyed the discussions with Claire. She gave me really good and relevant advice which helped me a lot to overcome my problem.

~ Anonymous Business professional
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claire challenged my unhealthy food beliefs in an empathic manner and suggested changes that were specific and achievable whilst continuing in my recovery from anorexia. “her knowledge and support have been really valuable in the progress I have made over

~ Steph Runner
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I was a relatively competitive athlete but wasn’t getting any better. My relationship with food was challenged, but Claire Fudge unzipped all of my psychological hang-ups and addressed it with science. It freed me from worrying, and I actually started enjoying food again. It’s an educational investment, a change-in-whole approach, and something I will carry through for life. I can’t recommend her highly enough.

~ Richard CFO and Ironman Age Group Athlete
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Just wanted to email you with a big thank you for helping me to manage my eating regime. I was very pleased with my race results.

~ MS Business professional and Runner
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The moment someone says to you, ‘you know the symptoms you are experiencing are not normal’. Was really the moment the journey began to experiencing a normal existence. “years with food intolerances, …. impossible to control …..I am now free to live my life without symptoms and all of the related issues I was experiencing (anxiety about going places, worrying if I was going to be ill when I went out, the list continues…) . all of the guesswork (was removed) ….introducing each element in bitesize chunks ensured it wasn’t in anyway daunting, and allowed the outcome to be obvious . Having the support and expertise throughout was such a huge benefit, and now I can everyday apply the principles learnt with confidence, knowing they are specific to my needs. Being normal feels amazing!”

~ Sarah Director and Adventure Endurance Cyclist
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training for my first Ironman I knew how important getting my nutrition right would be leading up to the race and on race day. Claire has helped me more than I could have imagined. Lifestyle changes we have discussed and implemented have meant that unlike any fad diets before; I am leaner and letting my food be the proper energy and recovery source it should be. Claire is always supportive, really cares about the people she works with and I love her approach to nutrition; working with what you have to make the best out of your body.

~ Vicki Business professional and Triathlete
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“before my first 70.3 …we identified my intolerances for everyday life, (she helped) fuel my training sessions and put together a plan for the lead up to my race and race day itself. “Claire being a triathlete herself, her advice is second to none”

~ Jordan Triathlete
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“Your encouragement means a lot at a time when work and training is difficult and I cannot see the journey back to ‘normal’….. your positivity is highly contagious – I feel better already “

~ Caroline Business professional and Triathlete
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I cam to see Claire in the run-up to my first ironman event. Within days of following her advice, I saw a noticeable difference; Training is improving all the time. All is on track for nailing the nitrition for the ironman event next month!

~ Claire Business professional and Ironman triathlete
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Claire challenged my unhealthy food beliefs in an empathic manner and suggested changes that were specific and achievable whilst continuing in my recovery from anorexia. “her knowledge and support have been really valuable in the progress I have made over the past few months and I would definitely seek her advice in the future.

~ S Business Professional
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I have worked with Claire for over a year having suffered with disordered eating from an early age. I knew I needed to do something to change it.

~ Annie Business professional and Runner
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“I run better, I feel better, I’m not getting injured, and I sleep well”. “I thought I needed a diet plan; but that is exactly what I didn’t need. I gained the knowledge and support and the balancing of everyday life around training along with personal life too”.

~ Sam Lt Cdr Thompson MBE RN, Senior Naval Instructor Wildcat Training Centre, and Ironman Age Group Triathlete
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“help with a long standing issue, It was her personality, honesty and openness which gave comfort in trying her methods. Over the year that I have spent working with her, I have gained the knowledge and insight to manage my symptoms, giving me a new found sense of freedom. I would wholeheartedly recommend Claire to anyone who needs nutritional advice.”

~ Richard Business owner and Triathlete
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I first met Claire Fudge of 4th Discipline in the summer of 2021 for sweat rate test to better understand his electrolyte and hydration requirements for training for a Guinness World Record attempt for an endurance event.
I came away thinking I would like to work with the 4thdiscipline team as they provide nutrition coaching for performance to professional athletes and people like me who have been blundering through the nutritional needs of heavy training.
4thdiscipline know their stuff and their engagement with me was focussed on my individual needs basing my education and planning on science. At all times they worked with me in a calm, supportive and realistic fashion.
For anyone looking to improve their understanding and knowledge of food and sport I can highly recommend them!

~ Seamus IT consultant and Squash
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Thank you for your help over the last few months. It was very helpful and I learnt many things I was not aware of before.

~ Giulia Runner
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“have really appreciated the holistic approach to your guidance that reflects a genuine desire to teach me the skills I need to become the healthiest and strongest athlete I can be”

~ Rosalind Business professional and Triathlete
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“revolutionised how I eat during …. big sessions. From my former race snacks mindset to a proper fuelling strategy-it’s made a demonstrable difference in my form”

~ Andrew Managing director and Triathlete
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Since working with Claire, she’s made a huge difference to the way that I’ve been able to execute my training sessions, bring the energy that I need at the right times to competition, and get the most out of recovery. I wholly recommend giving Claire a call. The biggest thing to take away is that everything that we do is absolutely manageable!

~ Georgie Cohen Marketer and Professional Skeleton Athlete
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Struggling with allergies, intolerenaces and anxiety around food for many years had a huge umpact in my daily life, being able to properly fuel for marathon training, recovery and race days. Symptoms have improved dramatically, my training is much more efficient and my confiedence around food has grown. I have lost count of the different diets and plans that I have tried; I have seen a really positive change. I really couldn’t recommend Claire any more highly.

~ Rhys Accountant and Marathon runner
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“ frankly i hadn’t got any knowledge….Claire was amazing! She helped me plan out my nutrition… to make sure i was getting the best performance (this) allowed me to fully concentrate on the competition.. “best competitive season of my life so far, gaining my first GB senior vest competing at the Athletics World Cup, 2nd place at the British Championships and becoming England Champion gaining my first England Senior International vest”

~ Sophie Physiotherapist and GB pole vaulter
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A big thank you for helping me to manage my eathing regime. Meal advice before the race seemed to really help keep my stomach settled on race day. I was very pleased with my race results. Really impressed by how good I feel and not so tired. A lot of this has to do with my new meal plans for training and racing.

~ Anne Athlete
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I wanted to understand what food is good for me as I trained and when doing races…..some foods did not agree with me but I did not understand why……..Gave me these answers and has helped me improve my race times as well as eat more sensibly. My lifestyle has benefited from this enormously. I received expert advice on what to eat during (injury) ….incredibly helpful and informative and I was impressed at her wealth of knowledge & experience. “Claire helped me understand what foods work for my body. I’ve improved my race times and transformed my lifestyle.”

~ Rachel Managing director and World-class triathlete
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Just wanted to email you with a big thank you for helping me to manage my eating regime. I was very pleased with my race results.

~ Anonymous Athlete
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instrumental in uncovering my coeliac disease, supporting me to make the necessary changes to a gluten-free lifestyle, which alleviated by IBS symptoms. This in turn positively impacted my fertility. Can’t thank her enough for her tailored expertise which also extended to advice around diabetes management during pregnancy!

~ Jen Psychologist and Yoga
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I had a sweat test done by Claire – I’ve yet to put the results into practice, but really enjoyed our discussion. She explained the process and how to put the results into practice very clearly. She also seemed to me to have a very balanced view (it was not just a sales pitch for Precision Hydration!) which gave me a lot of confidence in her advice.

~ Kevin
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I couldn not recommend working with Claire enough – it was a relef to find someone that could relate and understand my nutritional needs for ironman training/racing and recovery!

~ Emily Business professional and Ironman triathlete

Frequently Asked Questions

Limited monthly availability
Which service is right for me?

The right service depends on whether you are looking for support as a driven professional, a professional who competes, an athlete, a team, a research organisation or an event organiser.
If you are unsure where to begin, book a discovery call and we will guide you towards the most appropriate pathway.

Do you only work with professional and elite athletes?

No. I work with professional and Olympic-level athletes, athletes on talent and high-performance pathways, competitive age-group athletes and professionals who train, race or compete alongside demanding careers.

The level at which you compete is less important than your commitment to improving your health, fuelling and performance.

I also support driven professionals who are not athletes but want to improve their energy, focus, resilience and long-term health.

What is Personal Performance Precision?

Personal Performance Precision is my approach to creating nutrition support that is fit for purpose and designed around the individual.

Generic plans are built for an average person. They do not account for your physiology, health history, symptoms, training, workload, lifestyle, preferences or goals.

Personal Performance Precision brings these factors together with clinical expertise, performance science and meaningful personal data. This allows us to identify what is affecting your health and performance, then engineer a practical strategy around your specific needs.

Like a tailored suit rather than something taken straight from the rack, the strategy is shaped around you: how you live, how you move, what your body needs and what you are working towards.

The result is not simply more nutrition information. It is a clear, personalised approach designed to support your energy, health, recovery and performance now and over the longer term.

What is the difference between a dietitian, a nutritionist and a nutritional therapist?

In the UK, dietitian is a legally protected title. Dietitians are regulated healthcare professionals qualified to assess and treat nutritional problems, including those associated with medical conditions.

The titles nutritionist and nutritional therapist are not legally protected, so qualifications, training and experience can vary. Registered Nutritionists and nutritional therapists who belong to recognised professional bodies may have completed relevant training, but their scope of practice differs from that of a registered dietitian.

As a Registered Clinical Dietitian and High-Performance Nutritionist, I combine clinical assessment and evidence-based care with specialist sports and performance nutrition.

This is particularly important where symptoms, blood markers, low energy availability, gut issues, injury, REDs, disordered eating or a medical condition may be affecting health and performance.

Do you work with people with eating disorders or REDs?

Yes. I provide specialist clinical and performance nutrition support for athletes and active individuals with eating disorders, disordered eating, Relative Energy Deficiency in Sport (REDs) and low energy availability.

Support may include nutritional rehabilitation, restoring adequate fuelling, reducing nutrition-related risk, supporting training and recovery, and working alongside doctors, psychologists, physiotherapists, coaches and other members of the multidisciplinary team where appropriate.

Where clinical risk is present, the priority is always safe, coordinated and appropriate care.

Do you write meal plans or diet plans?

A clear plan for what, when and how you eat can be valuable, but lasting change requires more than a prescriptive meal plan.

Where appropriate, I provide personalised meal structures, fuelling plans, practical food ideas, competition strategies and guidance around timing, recovery and preparation.

These sit within a wider approach that considers your health, schedule, training, travel, preferences, symptoms and goals.

The aim is to give you a strategy you can understand, adapt and sustain rather than a rigid plan that only works temporarily.

Do you offer one-off consultations?

Most individual support is delivered through a structured programme rather than a single appointment.

A first consultation begins the process of understanding your symptoms, patterns, data, health history, training demands and goals. Follow-up support allows recommendations to be implemented, reviewed and refined.

One-off specialist consultations may be available for clearly defined needs, such as an expert review or sweat sodium testing.

Please contact the team to discuss the most appropriate option.

What happens after I enquire?

You will be guided towards the service that best matches your goals, health needs and performance demands.

Where appropriate, the first step will be a discovery call or initial conversation to understand the support you are looking for and whether the service is the right fit.

You will then receive clear information about the recommended pathway, what is included, the expected timescale and the investment required.

A limited number of new clients are accepted each month to maintain the depth and quality of personalised support.

Do you work with corporate or business teams ?

Yes. We are often asked to provide series of workshops and longer programmes designed for C-suite, executive and partner teams. Whilst we have a framework for delivering for teams we can also tailor sessions to the company needs, KPIs and culture.

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