The nutritional challenge of the marathon
A marathon (42.195km) at race pace burns ~2500-3500 kcal. Liquid nutrition on the road serves 3 distinct objectives:
- Hydration: prevent dehydration (>2% = -20% performance)
- Carbohydrates: for efforts >90min at >70% ginger VO2max, exogenous carbohydrate intake is justified (30-60g/hour)
- Anti-inflammatory recovery: limit DOMS and post-exercise inflammation
Energy gels (25-40g sugar/gel) are justified for objectives 1 and 2, but do nothing for objective 3 — in fact, they aggravate it by maintaining post-exercise hyperglycemia.
How INTI supports the marathon
Phase 1: Before the start (D-1 to D0)
D-1 evening: 30ml of pure INTI → preventive AMPK activation. AMPK prepares muscle fibers for optimal glycogen utilization and fatty acid β-oxidation. A well-"primed" AMPK improves running economy and delays the glycemic wall.
D0 morning (2h before start): 30ml INTI + water → TRPV1 activation, NO release (eNOS), muscle vasodilation.
Phase 2: During the race (anti-inflammatory goal)
Diluted INTI (20ml in 500ml water) at the aid station after km 30. At this point, muscle inflammation begins to accumulate — COX-2/prostaglandins generate pain signals that affect pace. INTI inhibits COX-2 within 20-30 minutes, allowing the pace to be maintained in the final kilometers.
Phase 3: Marathon recovery (D0 to D+3)
DOMS peaks at D+2. INTI 30ml pure × 3/day → COX-2 + spinal NF-κB inhibition. Meta-analysis Daily et al. (2015): ginger shot without sugar reduces DOMS by -25% after 24h and -23% after 48h vs placebo.
INTI vs energy gels: complementary roles
| Product | Sugar | Anti-DOMS | Carbohydrate-energy | Marathon Use |
|---|---|---|---|---|
| INTI elixir | 1.19g/100ml | Yes (COX-2/NF-κB) | No | Before + after, and km30+ |
| Energy gel (GU, SIS) | 25-40g/sachet | No | Yes (glycogen) | Km15-35, every 45min |
| Isotonic drink | 6g/100ml | No | Partially | Hydration + Na+ |
FAQ — INTI and marathon Belgium
Can one run a marathon without energy gels using only INTI?
For runners >4h (moderate intensity) with optimal glycogen levels, yes — INTI + water is sufficient with a good pre-race nutrition strategy. For runners <3h30 at high intensity, gels remain necessary.
Does INTI help for long-distance trail running (ultratrail)?
Yes — the anti-inflammatory-science-utilisation">ginger anti-inflammatory COX-2 effect is particularly valuable in efforts >6h where cumulative muscle inflammation becomes a limiting factor.
At what time should INTI be taken on marathon day?
2h before the start: 30ml pure. During: 20ml diluted at km30/km35. Immediately after arrival: 30ml pure + water.
Related articles
To delve deeper into the topic, also read:
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- INTI and marathon: liquid nutrition for long distance, anti-DOMS, alternative to sugary gels — guide for Belgian runners
- INTI in the morning: why it's the best drink to start your day without sugar
- INTI 30-Day Cure: Expected Results and Full Protocol
- INTI vs GIMBER comparison or INTI: Which to Choose in 2025? Full Comparison and Verdict
- Marathon runners and ultra-endurance in Belgium: sports drinks vs INTI ginger — recovery, inflammation and performance
- INTI and long COVID: ginger as a natural alternative to sugary drinks for persistent fatigue in Belgium