Record-Breaking London Marathon 2025: How to Prepare for Race Day

The 2025 TCS London Marathon has set a new record, with 840,318 applicants vying for a spot in this prestigious event. Those lucky enough to secure a place will take on the iconic 26.2-mile course from Greenwich to Westminster on April 27, marking the 45th edition of the race.

With just eight weeks to go, runners are deep into their training, facing challenges such as fatigue, injuries, and motivation dips. To ensure peak performance on race day, here’s how to optimize training in these final weeks.

Key Training Strategies for the London Marathon
Get Your Body Used to Energy Gels
Energy gels help replenish carbohydrate stores and provide an essential boost during long runs. Performance coach Arj Thiruchelvam advises runners to start incorporating gels now, as the body takes about six weeks to adapt. Some gels may cause gastrointestinal discomfort, so testing them early will help avoid unwanted surprises on race day.

Structure Your Training Runs
Consistency and variety are key to marathon success. Thiruchelvam recommends running four times a week, including:

Two quality runs at different speeds and intensities.
Two easy-paced runs in heart rate zones one and two to build endurance.
This structured approach improves aerobic capacity while minimizing the risk of overtraining.

Tapering: Reduce Intensity Before Race Day
Tapering is the process of gradually reducing training intensity in the final two weeks. According to Thiruchelvam, this period should focus on lower-intensity runs to maintain fitness while avoiding fatigue. Staying active is crucial, but workouts should shift towards mobility exercises, yoga, swimming, or cycling to keep the body fresh.

Recovery and Injury Prevention
Prioritize Rest and Recovery
A Strava study found that runners training for marathons are prioritizing recovery more than ever, with 51% of training days in the 16 weeks leading up to the race dedicated to rest or active recovery.

Physiotherapist Laura Wilson emphasizes the importance of stretching, foam rolling, and allowing muscles to recover. Thiruchelvam advises stretching from the toes up, targeting quadriceps, hamstrings, calves, and Achilles tendons to prevent injuries.

Avoid Overtraining
As race day approaches, the temptation to overdo training increases. However, sudden spikes in mileage or intensity are the leading causes of injury. Runners should make small, gradual adjustments to speed or distance—never both at the same time.

Strength training is also essential. Wilson recommends incorporating pilates and resistance exercises like squats, lunges, and deadlifts to build stability and endurance. Training in socks can also strengthen the feet, reducing the risk of injury.

Final Preparations for Race Day
Train in Your Race-Day Gear
Wearing the exact trainers, socks, and outfit planned for race day helps prevent chafing and discomfort. Wilson advises runners to test their gear in training to ensure it fits well and feels comfortable over long distances.

Dial in Your Race-Day Nutrition
Fueling properly before the marathon is crucial. Runners should test their pre-race meals now to find what works best for them. Thiruchelvam suggests eating two to four hours before running, focusing on simple carbohydrates with minimal fiber and fat to avoid digestive issues.

Plan Your Race-Day Logistics
Knowing your start time, travel route, and road closures in advance helps reduce stress on race day. Preparing gels, hydration, and race essentials ahead of time ensures a smooth experience.

Stay Strong and Injury-Free Until Race Day
With just weeks to go until the London Marathon, the focus should be on maintaining training consistency, prioritizing recovery, and avoiding last-minute overexertion. By following these expert tips, runners can set themselves up for success and cross the finish line feeling strong.