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How Much Harder Is It to Run a 15K vs. a 10K?

by
author image Sara Ipatenco
Sara Ipatenco has taught writing, health and nutrition. She started writing in 2007 and has been published in Teaching Tolerance magazine. Ipatenco holds a bachelor's degree and a master's degree in education, both from the University of Denver.
How Much Harder Is It to Run a 15K vs. a 10K?
Running a 15K requires more training time than a 10K. Photo Credit Maridav/iStock/Getty Images

Running a race of any distance takes dedication and diligent training. Aside from the mileage, there are a few difference between a 10K and 15K, which equals 6.2 miles and 9.3 miles, respectively.

If you plan to run a 15K, you can expect to train longer and to train differently than if you were running the shorter distance. Once you know more about the requirements of successfully completing a 15K, you can determine if it is the right race for you.

Races

Running a 15K is naturally harder than running a 10K because you are required to run for a longer distance and a longer amount of time. According to "The Competitive Runner's Handbook," running a 15K is very similar to running a half marathon, which takes more time and training for you to be conditioned enough to complete the race. A 15K also puts more stress on your body than a 10K, both in training and in running the actual race. This added stress increases your risk of injury, particularly if you don't train properly.

Training Time

If you are running a 15K, you need to train longer than if you are planning to run a 10K. The length of time that it takes you to train for either distance depends on your level of fitness at the beginning.

When you train for a 15K race, you spend more time running — as well as more time running at an intense pace — than you would for a 10K race. If you have a specific finish time goal, you also need to increase your running speed by conditioning your body over time to run faster. This is done through intensive training that strengthens your leg muscles, so that you are able to improve your speed.

Training Requirements

Engaging in different training activities throughout the week enables your entire body to be well-conditioned to undergo your chosen race. If you plan to run a 10K, aim to train at least three days per week if you plan to run a 10K. The workouts could break down into running hills one day, doing intervals — periods of intense activity, followed by periods of slower activity — another day and going for long runs on the third day.

A similar three-day training program is effective for a 15K, though you may need to engage in each activity for longer periods of time than you would if you are planning to run a 10K. On one day, you would go for a short run, another day you would go for a long run and on the third day you would do intervals.

You should also rest on the alternate days to help your muscles repair themselves, so you are less likely to injure yourself.

Be Careful

Consider your activity level before signing up to run a race. A 15K is considerably more difficult if you are not in shape or have not been running for a while. Gradually ease into your training sessions to help prepare your body to become more physically active, as well as to help you reduce your risk of injury.

Running a 5K may be an effective way to begin training for a 10K, and running a 10K may be an effective way to train for a 15K. If you do injure yourself, take a few days — or weeks — off from training to allow your body to heal.

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