The marathon nutrition challenge
A marathon (42.195km) at a competitive pace consumes ~2500-3500 kcal. Liquid nutrition on the road serves 3 distinct purposes:
- Hydration: prevent dehydration (>2% dehydration = -20% performance)
- Carbohydrates: for efforts >90min at >70% ginger VO2max, exogenous carbohydrate intake is justified (30-60g/hour)
- Recovery anti-inflammatory-science-utilisation">ginger anti-inflammatory: limit DOMS and post-effort inflammation
Energy gels (25-40g sugar/gel) are justified for objectives 1 and 2, but do nothing for objective 3 — and may even worsen it by maintaining post-effort hyperglycemia.
How INTI supports marathon runners
Phase 1: Before the start (D-1 to D0)
D-1 evening: 30ml pure INTI → preemptive 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 onset of the glycemic wall.
D0 morning (2h before start): 30ml INTI + water → TRPV1 activation, NO release (eNOS), muscle vasodilation. Better vascularization at the start improves initial VO2 and delays lactate accumulation.
Phase 2: During the race (anti-inflammatory objective)
Diluted INTI (20ml in 500ml water) at aid stations after the 30th km. At this stage, muscle inflammation begins to accumulate — COX-2/prostaglandins generate pain signals that impact pace. INTI inhibits COX-2 in 20-30 minutes, allowing the pace to be maintained over the last kilometers.
Phase 3: Post-marathon recovery (D0 to D+3)
DOMS (Delayed Onset Muscle Soreness) peaks at D+2. INTI 30ml pure × 3/day → COX-2 + spinal NF-κB inhibition. Meta-analysis Daily et al. (2015): ginger reduces DOMS by -25% at 24h and -23% at 48h vs placebo.
INTI vs energy gels: complementary roles
| Product | Sugar | Anti-DOMS | ginger and 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 | Partial | Hydration + Na+ |
FAQ — INTI and marathon Belgium
Can you 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 preparatory dietary strategy. For runners <3h30 at high intensity, gels remain necessary.
Does INTI help for long-distance trail running (ginger ultra-trail)?
Yes — the anti-inflammatory COX-2 effect is particularly valuable for efforts >6h where cumulative muscle inflammation becomes a limiting factor.
What time should I take INTI on marathon day?
2 hours before the start: 30ml pure with a carbohydrate breakfast. During: 20ml diluted at km30 or km35. Immediately after finishing: 30ml pure + water.
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