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How to Train for a Half Marathon

Tips and tricks April 20, 2026

Training for a half marathon (21.1 km) is an exciting challenge that requires both physical preparation and mental preparation. To successfully complete this distance, your body needs a structured training program, proper nutrition, and consistent planning. If you’re a new runner, allow at least three to four months to train for a half marathon and gradually build your endurance. Whether your goal is to cross the finish line or achieve a personal best time, having the right plan is essential.

Planning Your Training

A half marathon requires strong cardiovascular endurance, resilient muscles, and the ability to maintain a steady pace over a long distance. The best way to train for a half marathon is to follow a structured training plan that includes: 

  • Interval training to improve speed and overall performance (e.g., 400 m repeats)
  • Easy runs to build endurance at a comfortable running pace
  • Tempo runs to sustain effort and improve race pace
  • A weekly long run to adapt your body to the full distance

Building a Half Marathon Training Program


A well-designed training program is key when learning how to train for a half marathon. Your program should match your current fitness level and gradually increase in intensity over several weeks. A typical week may include 3–5 runs, combining different types of workouts with rest days for proper recovery. Remember, your plan should support your health, maintain motivation, and adapt to your lifestyle. 

 “A good training program combines endurance, speed, and recovery, while taking your health and lifestyle into account. Before you begin, take the time to understand your body and its abilities so you can progress in the right direction without injury.”

– Pierre-Paul Daoust, Private Trainer, The YMCAs of Québec

Working with a personal trainer can help you build a realistic and effective training program, especially if you’re progressing from shorter distances like 5 km or 10 km to a half marathon.

Nutrition and Hydration

When learning how to train for a half marathon, nutrition and hydration are just as important as running. Your body needs the right fuel to maintain energy, support your muscles, and sustain performance during training and on race day.

Carbohydrates are essential for endurance running. They help maintain energy levels and improve performance during long runs and workouts.

Balanced Nutrition for Running


A simple and effective sports nutrition approach includes:

  • 1/3 carbohydrates (fruit and whole grains)
  • 1/4 protein to support muscle repair
  • The rest vegetables for overall health  

As your training progresses, add carbohydrate-rich snacks to support your increasing energy needs—especially before a long run or intense session. 

Hydration During Half Marathon Training


Proper hydration is key to maintaining performance and avoiding fatigue. Your needs will depend on your body, the weather, and your training intensity. Make hydration part of your routine and test different strategies (water, electrolytes, gels) during training—not on race day.

Setting Realistic Goals for Your Half Marathon

If you’re learning how to train for a half marathon, setting realistic goals is important. Focus on your own progression rather than comparing your times to others. Whether your goal is to complete the race, improve your pace, or achieve a personal best, consistency and smart training will help you get there.

Consistency is key

  • In a half marathon, consistency is key. Follow your own pace and avoid starting too fast due to adrenaline and race-day excitement. Your pacing, nutrition, hydration, clothing, and shoes should all be tested beforehand to avoid surprises. Most importantly, enjoy every kilometre—you only get one first experience!

    Étienne Faucher-Simard

    Private Trainer and Conditioning Room Instructor at the YMCAs of Québec, B. Sc. in Kinesiology

Post-Race Recovery and Rest

After your event, proper post-race recovery is essential. In the first 30 minutes, walk, hydrate, and refuel with a light snack. Within two hours, eat a balanced meal to restore energy and repair your muscles. In the following days, prioritize rest and light activity like easy running or stretching.

Taking recovery seriously will help your body bounce back and get ready for your next challenge.

YMCA Challenge | Every Step Can Change a Life

On May 2, the YMCA Challenge will bring our community together at Maisonneuve Park for a fundraising run in support of youth, families, and individuals facing vulnerability. Funds raised help provide equitable access to YMCA programs and services for those who need them most.

You can get involved in many ways: make a donation, start your own fundraiser, or come run with us.
Raise $100 or more and your race bib is free!

Together, let’s make every step count for our community.

Because together, we can open doors and make a real difference.

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