Marathon Season: Preparing Your Gut for Peak Performance

As marathon season approaches, runners across the UK begin increasing mileage, extending long runs, and sharpening race pace efforts. Whether you’re lining up for the London Marathon, the Manchester Marathon, or targeting an autumn PB later in the year, one thing becomes clear during heavy training blocks:

Your gut is under pressure.

Long-duration efforts, race-day nerves, increased carbohydrate intake, and cumulative training stress can all challenge digestive comfort. This is where Intensive Training Biotic 30 Capsules has been specifically formulated to support endurance athletes.

Why Marathon Training Challenges the Gut

Endurance running places unique demands on the body:

• Blood flow is redirected away from the digestive tract during prolonged exercise
• Core temperature rises
• Mechanical impact from running can disturb gastrointestinal comfort
• Training stress may affect immune resilience

Many marathon runners experience bloating, urgency, nausea, or general discomfort during peak training and race day. Maintaining digestive balance becomes a strategic advantage — not just a comfort issue.

What Makes Intensive Training Biotic Different?

This advanced formula combines:

• 25 billion live cultures per capsule
• The clinically studied Lab4 consortium
• L-Glutamine
• N-Acetyl Glucosamine
• ElavTP™

It is vegetarian, gluten-free, dairy-free, and GMO-free — making it suitable for a wide range of athletes during high-load training phases.

The Role of Biotics in Endurance Training

Friendly bacteria (referred to here as Biotics) are naturally present in the digestive tract. Levels may fluctuate during periods of intense physical stress.

The specific strains used in this formula — including Lactobacillus acidophilus, Bifidobacterium infantis, and Bifidobacterium bifidum — are supported by established claims from the European Food Standards Agency (EFSA):

• Help to maintain and replenish the natural bacterial flora of the digestive tract
• Help maintain proper functioning of the digestive tract and help regulate intestinal function
• Help to maintain proper functioning of the immune system

For marathon runners and endurance athletes, this means supporting digestive balance throughout high-volume training, travel, and race-day conditions.

L-Glutamine & The Marathon Runner

Mileage builds — so does physiological stress.

L-Glutamine is a conditionally essential amino acid, particularly relevant during periods of heavy training load.

• Contributes to the healthy function of the nervous system and brain
• Helps promote and maintain integrity of the intestinal lining
• May help prevent intestinal permeability
• May help support a healthy gastrointestinal tract
• Supports a healthy digestive system and contributes to strengthening natural defences

For endurance athletes, maintaining intestinal integrity is particularly important during prolonged efforts and in hot race conditions.

Clinically Studied in Endurance Athletes

The Lab4 consortium used in Intensive Training Biotic has been included in multiple UK-based studies involving endurance athletes. Research has explored digestive support and endurance outcomes in marathon and ultra-distance training.

While individual results will vary, these studies have investigated how supplementation may support runners during demanding training and competition phases. Findings have been documented and published in peer-reviewed journals. Contact us for further information.

Build Stability Through Consistency

Take consistently during your training block rather than only on race week. Gut stability is built through routine, not last-minute changes.

The Competitive Edge Is Often Invisible

Shoes matter. Pacing matters. Nutrition strategy matters.

But experienced athletes know that digestive stability can influence race-day comfort and consistency.

Supporting the digestive system and immune function during heavy training may help you stay consistent, comfortable, and focused on the miles ahead.

As marathon season approaches, consider whether your gut is as prepared as your legs.

Train hard. Stay balanced. Finish strong.