Welcome to Upstream Performance
Transform Your Life today!
About me
Fitness, Nutrition & Transformation Expert
I help you transform your body and health with expert training, science-based nutrition, and personalized strategies for fat loss, muscle gain, and lasting results.
transformation expert
Personal training, online coaching, gut health optimisation, and evidence-based nutrition — everything you need for a complete transformation
Assurance of Certified Expertise
Choose us for the assurance of certified expertise. Our trainers are not only passionate fitness enthusiasts but also certified professionals with years of experience. You can trust in their knowledge, guidance, and commitment to helping you achieve your fitness goals.
Proven Success Stories
Our track record of success speaks volumes. Join a community where numerous individuals have achieved transformations. From weight loss and muscle gain to improved overall health, our success stories reflect the effectiveness of our programs and the dedication of our clients.
Personalized Approach
At Marc's Fitness Hub, we understand that everyone's fitness journey is unique. Our commitment to a personalized approach ensures that your workout programs, nutritional guidance, and support are tailored specifically to your goals, preferences, and fitness level.
PERSONAL TRAINING
From £55–£75 per session
studio | home visits | outdoor
Personal Training
— 1:1 personalised coaching
— 60 minute training sessions
— Basic nutrition guidance
— WhatsApp support
— Progress tracking
Perfect for:
- General fitness
- Fat loss
- Strength & conditioning
- Accountability
- Building healthier habits
Personal Training block packages
Designed for clients wanting faster body transformation results and more accountability.
— Block session discounts
— Personalised training plans
— Nutrition support
— Monthly measurements
— Progress photos
— WhatsApp support
— Supplement guidance
Perfect for:
- Fat loss
- Muscle building
- Confidence & consistency
- Lifestyle change
Premium Transformation Coaching
A more advanced transformation-focused coaching package combining fitness, nutrition and gut health support.
— Advanced body transformation coaching
— Personalised nutrition strategy
— Gut & metabolism support
— Monthly measurements + progress photos
— Priority WhatsApp support
— Supplement discounts
— Access to transformation challenges
Ideal for clients struggling with:
- Stubborn weight loss
- Low energy
- Poor recovery
- Hormonal imbalance
- Digestive issues
Nutritional Therapy
Functional nutrition and gut health support designed to uncover root causes and restore long-term health.
- IBS
- IBD
- Crohn's Disease
- Coeliac Disease
- GERD / Reflux
- H. pylori
- Candida
- SIBO
- Hormonal imbalance
- Metabolic health
- Digestive dysfunction
- Fatigue & inflammation
Includes:
Full health, lifestyle & nutrition assessment Family and medical history review Gut and symptom analysis Personalised nutrition & lifestyle plan Functional testing recommendations if required Handouts & support materials GP/doctor letters if needed
Includes:
Progress review Adjustments to nutrition & supplements Continued support and guidance
'fix the root cause. transform the body'
Marc Upstream Performance
FIX YOUR GUT.
RESTORE YOUR METABOLISM.
UNLOCK YOUR PERFORMANCE!
If you’re dealing with bloating, reflux, fatigue, stubborn weight gain, or poor recovery despite doing everything ‘right,’ the issue may not be effort, it may be your underlying physiology.
At Marc Upstream Performance, we identify and correct the root drivers of digestive, metabolic and immune dysfunction so you can finally see sustainable progress.
RELATABLE PROBLEM
- — Persistent bloating, reflux, or digestive discomfort
- — Diagnosed or suspected SIBO or gut imbalance
- — Difficulty losing weight despite dieting
- — Fatigue, inflammation, or brain fog
- — Poor recovery from training
- — Reliance on or transition from GLP-1 medications
- — A feeling that your body is 'stuck'
It’s not a lack of discipline. It’s a physiological bottleneck.
When digestion, metabolism, and immune function are disrupted, your body works against you, no matter how hard you try.
what we do
We Identify What’s Actually Holding You Back
Most approaches focus on symptoms.
We focus on function.
We assess and address underlying issues such as:
- — Impaired digestion and low stomach acid
- — Microbiome imbalance and bacterial overgrowth
- — Poor bile flow and fat digestion
- — Gut barrier dysfunction (leaky gut)
- — Chronic low-grade inflammation
- — Blood sugar instability
- — A feeling that your body is 'stuck'
When these are corrected, the body can finally:
- Burn fat efficiently
- Recover properly
- Regulate energy and appetite
- Reduce inflammation
the Marc upstream method
1. Comprehensive Clinical Assessment
2. Targeted Physiological Restoration
A 90-minute deep dive into your health, including:
Full health and symptom history
Digestive and metabolic analysis
Lifestyle, stress and recovery review
Medication and supplement evaluation
Review of existing blood work
This allows us to identify the true drivers of dysfunction.
A personalised plan designed to restore function, which may include:
Improving digestion (acid, enzymes, bile support)
Correcting microbiome imbalances (e.g. SIBO)
Repairing gut barrier integrity
Reducing systemic inflammation
Stabilising blood sugar and metabolism
Every intervention is specific, strategic, and clinically driven.
3. Strategic Functional Testing
4. Performance & Body Composition Integration
Where needed, advanced testing (such as stool analysis) is used to clarify more complex cases.
Testing is targeted—not excessive or routine.
Once physiology is restored, we integrate:
Strength training
Body composition tracking
Ongoing metabolic support
Nervous system regulation
Because real physique change requires a body that functions properly.
Featured Success Stories
Discover real people achieving real results...
— Fat loss after years of stalled progress
— Resolution of chronic bloating and reflux
— Improved energy, recovery and performance
— Reduced reliance on medication
— When physiology improves, results follow.
Stephen
A 33-year-old accountant, transformed his physique by dropping from 16% body fat to an impressive 7%. After many failed attempts in the past, he committed with discipline and consistency to his training and nutrition, determined to finally see the results he’d been chasing. His hard work paid off, and just in time for his big holiday, he revealed the abs he once thought were out of reach.
Lona
A dedicated lawyer and mother of two who set out to build strength and muscle. Through consistent training, she has significantly increased her performance in all major lifts — squats, deadlifts, and chest press. By developing a strong mind-muscle connection, she has been able to maximize every workout, leading to noticeable improvements in both strength and physique.
Raoul
A 39-year-old company director, has achieved an incredible transformation — dropping from 124kg to 92.5kg and reducing his waist size from 47 to 39 inches. Despite his demanding schedule, he committed to a healthier lifestyle and now enjoys the benefits of renewed energy, confidence, and long-term health.
CONDITIONS WE COMMONLY SUPPORT
— Digestive issues (reflux, bloating, SIBO)
— Gut barrier dysfunction & inflammation
— Post-gallbladder digestive challenges
— Weight gain & insulin resistance
— GLP-1 medication transition
— Chronic fatigue & poor recovery
— Body composition resistance
Our focus isn’t symptom suppression—it’s restoring function.
our philosophy
— Reduce Inflammation. Restore Function. Rebuild Performance.
— Digestive dysfunction and gut imbalance often drive inflammation throughout the body.
this impacts:
- Nutrient absorption
- Hormonal balance
- Regulate energy and appetite
- Fat loss and metabolism
- Muscle recovery and adaptation
- Energy production
By restoring digestive and metabolic function, we create the internal environment required for long-term health and performance.
who is this for
Marc Upstream Performance is for individuals who:
Feel stuck despite dieting or training
— Experience ongoing digestive symptoms
— Suspect underlying inflammation or gut issues
— Have complex or long-standing health concerns
— Want a structured, clinical—not guesswork—approach
Ready to take the next step towards a healthier, fitter you?