What happens to your body after a marathon
A marathon inflicts considerable damage: muscle micro-tears, systemic inflammation (CRP x20-30), glycogen depletion, 2-3 liters of dehydration, and a weakened immune system for 24-72 hours.
The first few hours (H0-H6)
Rehydration: the absolute priority
Isotonic drink (water + salt + sugar) within the first 30 minutes. Aim for 1.5 L of water per kg lost. Avoid alcohol for the first 6 hours.
Immediate nutrition
Within 30-45 minutes: carbohydrates (banana, compote) + 20-25g of protein (Greek yogurt, shake) to initiate muscle rebuilding.
D+1: the hardest day
Cold: your best ally
- Ice bath (10-15 min at 10-15°C): reduces inflammation and accelerates the elimination of metabolic waste
- Alternating hot/cold shower if no bathtub
Pressotherapy
This is the ideal time for pressotherapy boots. A 20-30 minute session will drain toxins and dramatically relieve heavy legs.
Compression
Wear compression socks all day to maintain venous return and reduce swelling.
D+2 and D+3: progressive mobilization
20-30 min walk, protein-rich nutrition (1.6-2g/kg/day), omega-3, vitamin C. Aim for 8-9 hours of sleep per night.
When to resume training?
- D+1 to D+7: rest and active recovery only
- D+7 to D+14: light jogging 20-30 min if no pain
- D+14 to D+21: progressive resumption
- D+28+: return to normal training
- D+42 (6 weeks): competitions possible
The 5 mistakes to avoid
- Resuming too quickly (maximum risk of injury)
- Eating little to avoid gaining weight (delays recovery)
- Alcohol in the first few days (worsens edema)
- Excessive ibuprofen (blocks muscle repair)
- Ignoring persistent joint pain
Conclusion
Marathon recovery is a discipline in itself. Hydration, nutrition, cold, compression, and sleep are its five pillars. Our equipment at Tout pour le corps is designed to support you during this critical period.