London Marathon 2026: 3 Weeks To Go | Fuelling, Hydration, Gels & Injury Advice

3 weeks. 19 days. This is where runners either set themselves up for a brilliant London Marathon… or make costly mistakes.In Part 2 of our BBC London marathon build-up series, broadcaster Nikki Bedi is joined by Arj Thiruchelvam, Head Coach of Performance Physique, to cover the questions every runner is asking right now:Can I do the marathon on just water?Do I need carb gels?What’s the difference between high-carb vs lower-carb gels?What if I had to stop my final long run because of knee pain?How do I train my gut without nausea or cramps?How should I manage hydration on the London Marathon course?What should I do about injuries in the final 2–3 weeks?Arj breaks down:✅ Gut training✅ Fuelling every ~35 minutes✅ Water stations & energy stops✅ Electrolytes in the final week✅ Race morning nutrition✅ Injury managementIf you’re running London Marathon 2026, this is the stage where smart decisions matter most.Comment below with your biggest race day concern — fuelling, pacing, hydration or injury — and we’ll cover more in the next episode.Follow on Instagram for more top tips: @performance_physique