Race day lasts a few hours. Training lasts weeks or even months.

So what does smart race training actually look like? Steven E. Mayer, MD, a sports medicine physician at Northwestern Medicine, answers common questions about training, injury prevention and full recovery.

When Should I Start Training for a Race?

When you should start training depends on your race distance, fitness level and running experience.

Many runners preparing for a half marathon or marathon often follow a training plan that lasts about 12 weeks, but timelines can vary widely. If you’re new to running or returning after a long break, you may need additional time to build endurance safely.

“If you are sedentary, you may need to begin training for a 5K several months before the event,” says Dr. Mayer. “A very fit and experienced athlete may need little to no preparation or perhaps just a few weeks to get ready.”

Most training plans include a mix of easy runs, longer runs and rest days. Easy runs may not feel challenging, but they play an important role in building endurance while reducing stress on the body.

What Kind of Workouts Should I Do?

Running more miles is only one part of the story.

Many race training plans also include tempo runs. Think of these as runs that push you outside your comfort zone without requiring an all-out effort. They can help build endurance and prepare your body to maintain a steady pace during race day.

It can also be helpful to pay attention to your heart rate during training. Heart rate monitoring can provide insight into how hard you’re working and help prevent you from pushing too hard on every run.

Strength training is another key component. Exercises that build your core, hips and legs can improve running form and help support you as you run farther.

“Make sure you work on core strengthening and not simply running to help prevent overuse injuries,” says Dr. Mayer. Common overuse injuries, such as shin splints and runner’s knee, can happen when runners train too much too soon. They can also happen when runners don’t allow enough time for recovery.

Stretching and mobility exercises also deserve a place in your routine. They can help you maintain flexibility, support range of motion and reduce muscle tightness during training.

How Can I Avoid Overtraining?

When you’re excited about an upcoming race, it’s easy to think more is always better. But recovery is a critical part of training.

“Start slow and go gradually,” says Dr. Mayer. “Give yourself days off every now and then even if you do not feel like you need them.”

He also recommends cross-training once or twice a week. Activities like swimming, biking or using an elliptical can help you stay fit. They also give your joints a break from the repetitive impact of running.

If you notice ongoing pain, unusual tiredness or declining performance, it may mean your body needs more rest.

Should I Change My Diet During Training?

A healthy diet can support both performance and recovery.

Dr. Mayer recommends focusing on:

• Fruits and vegetables
• Lean proteins
• Healthy fats
• High-quality carbohydrates

“The better you eat, the better your body can perform,” says Dr. Mayer. “You will also be less likely to have stomach issues in training and races.”

Hydration and adequate sleep are also important for performance and recovery, especially during periods of heavier training.

What Is Tapering?

Tapering is the final phase of a training plan, when you gradually reduce your mileage or training time before a race. This gives your body time to recover after weeks of training and helps you arrive at race day feeling fresh.

For a half marathon or marathon, tapering often begins about two weeks before race day. For a 5K, a few days of reduced training may be enough.

While cutting back can feel uncomfortable, tapering helps reduce fatigue and prepares your body to perform at its best.

What Should I Do After a Race?

Recovery starts the moment you cross the finish line.

“I recommend that you keep walking for several minutes after you cross the finish line,” says Dr. Mayer. “This helps prevent blood from pooling in your legs, which can make you feel lightheaded.”

He suggests rehydrating and refueling within 20 to 30 minutes after a race. Water, electrolytes, carbohydrates and protein can all help jump-start recovery.

It’s also important to remember that full recovery takes time. Depending on your race distance and training history, your body may need days or even weeks to resume normal training.

Winning Tips for Race Day Success

Training for a race looks different for everyone. Still, some basics apply whether you’re preparing for a 5K, half marathon or marathon:

• Start with a training plan that matches your fitness level and experience.
• Be sure you have the right running shoes for your feet.
• Build mileage gradually and include a mix of easy runs, longer runs and tempo runs.
• Use tools like heart rate monitoring to better understand training intensity and avoid doing every run too hard.
• Make strength training and cross-training part of your routine to help prevent injuries.
• Prioritize recovery days and listen to your body to avoid overtraining.
• Focus on a balanced diet, hydration and sleep to support performance.
• Taper before race day so you arrive at the starting line rested and ready.
• Begin recovery as soon as you finish the race by walking, rehydrating and refueling.
• Allow time for full recovery before returning to regular training.

Crossing the finish line starts long before race day. Consistent training, smart recovery and healthy habits can help you feel stronger, build confidence and help you enjoy every step of the journey.