How Much Running is Too Much? 14 Signs You’re Overdoing It

Runners love numbers. From cadence to pace to heart rate, we devour data like devour miles. But one number runners really tend to focus on is mileage.

But how can we tell how much running is too much? Is there even such a thing?

The truth is, there’s no universal mileage limit—every runner is different. But your body always gives clues when you’re overdoing it. 

The warning signs start subtly—a little extra fatigue, a nagging ache that lingers longer than usual. It’s easy to brush them off as part of the grind, but ignoring them could be the difference between smart training and burnout.

I’m going to break down the key warning signs, weekly volume considerations, and training strategies to help you find that sweet spot between pushing limits and staying injury-free.

Is More Always Better?

The more you run, the better you will get. Running is a sport rooted in consistency. That’s because the greater the demand, the greater the adaptation in your body. 

The more you run, the denser your capillaries and mitochondria will become—making you more energy efficient—and the more efficient your body will move, etc.  

“All these adaptations can be thought of as the body’s attempt to cope with the demands placed on it by running every day,” says certified running coach and author of the bestseller Running a Marathon for Dummies Jason Karp.

But, everyone has a limit.

How Much Running Is Too Much Running?

You can run too much. Like with anything, more is not always better. Most runners will see improvements in their running by running more, up to a point. And there is no research to indicate exactly how much running is too much— it varies from runner to runner. 

“The answer depends on a number of factors, including athletes’ genetically determined propensity to continually adapt to greater amounts of running and the amount of running they can physically and psychologically handle,” says Karp. 

Generally speaking, a runner running 30 miles per week will see improvements, gradually increasing their mileage up to 60 miles per week (increasing by 10 percent per week with a reduction in miles every fourth week).

If a runner is still seeing running performance gains at 60 miles per week, there is no need to increase mileage to 70 miles per week. 

“Runners may get faster by running more as long as their bodies and minds can handle it,” says Karp. “While running more than 70 miles per week may improve economy, it also comes with an increased injury risk.”

Running experts believe that the maximum training volume humans can undertake before breaking down lies between 75 and 120 miles per week. 

14 Signs You Are Running Too Much

How Many Miles Should You Run A Day?

Or, what is the recommended maximum mileage for running per week?

Runners can figure out what mileage they should run by paying attention to their bodies, minds, and schedules. 

Everybody and every BODY is different. Thus, mileage goals for different distances or even goal times will vary based on background, schedule, training response, and ability. 

The key is increasing mileage in a systematic, methodical approach to increasing his or her mileage. 

For example, a beginner runner who has never run before can start with 2-3 days per week, running 30-second jog intervals interspersed with walk intervals, while other beginner runners can run a few miles at a time.

A beginner needs to find their comfortable starting point and gradually increase from there. 

How Much Do I Need To Run A Week To Get Faster?

Karp and Norris agree on some clear running tips: you will get faster if you increase mileage in a safe way:

If you build from 15 miles per week to 25, from 30 miles per week to 40, and even from 40 miles per week to 50, you will find yourself becoming a faster, stronger runner. But that does not mean every runner will thrive under 50 miles per week.

Norris advises runners to think about time spent running instead of mileage since the body doesn’t know what mileage you are running, but it does know the time spent running.

“Depending on how well trained you are, 75-90 minutes should be the cap of a daily run – whether you run 6 or 12 miles in that time. A midweek workout can be slightly long and then a long run with 25-30 percent of weekly mileage.”

How much running is too much? “If a mileage requires more than 90+ min run most days, it’s too high of mileage,” she explains.

Are There Mileage Recommendations For Different Levels Of Runners? 

There are no standard mileage recommendations for runners to run to achieve specific goals. 

Therefore, you cannot assume that if you run 50 miles per week, you will be able to break 4 hours in the marathon, for example.

Some runners may be able to run a BQ with 40 miles per week, while others can need to run 70 miles per week. Some will never run a BQ, regardless of how many miles per week they run.   

“Each runner will have a ‘sweet spot’ of mileage at which he or she runs at his or her best and doesn’t get injured,” explains Karp. “Some runners get injured at 30 miles per week, while others get injured at 100 miles per week.”

Also, just because you may be training for a shorter distance, like a 5k, doesn’t mean you should run significantly less than someone training for a marathon, as the physiological adaptations that occur with more mileage help runners at any distance.

Is the Quality Of Running More Important Than Quantity?

The health benefits of running are immense, but more doesn’t necessarily mean better.

Running more will make you faster up to a point. But you cannot forget about quality over quantity, notes Karp, who is currently training elites in Kenya. Running short, but high quality runs is essential to your training.

“While most runners and coaches agree that training volume is important, training intensity is even more important in improving fitness and performance, especially in highly trained runners,” he says. 

Research has shown that a high training intensity is vital for maximizing cardiovascular improvement and that VO2 max and other physiological variables can continue to improve with the inclusion of high-intensity training. 

“Given that training volume will impact training intensity, the better question may not be how much mileage is necessary or enough, but how much running is too much to sacrifice intensity,” notes Karp. 

Thus, if you aren’t feeling energized or recovered enough to do hard workouts, your mileage may be too high (even if you aren’t injured). 

If you are regularly running long distances, you can be doing more harm than good.

What Factors Help Me Determine How Much Running Is Too Much Per Week?

Runners can determine how much running is too much by paying attention to how their bodies feel.

Ask yourself questions like:

• Am I feeling fresh and recovered by my next run? 
• Do I have aches and pains? 
• Am I feeling sluggish on my runs? 
• Am I battling injuries or illness?

Runner should also pay attention to their mindset:

• Am I looking forward to running or dreading it?
• Am I enjoying the process?
• Am I feeling motivated to run?

Finally, runners should look at how much time they have to run:

• Can I realistically maintain my current weekly mileage?
• Do I have time to do my supplemental training?
• Do I have time and energy to run speedwork and quality training?

If you find yourself feeling tired or unmotivated, you could have what is called overtraining syndrome. 

What Is Overtraining Syndrome?

Overtraining syndrome²Kreher, J. B., & Schwartz, J. B. (2012). Overtraining Syndrome. Sports Health: A Multidisciplinary Approach, 4(2), 128–138. https://doi.org/10.1177/1941738111434406, or OTS, is characterized by a prolonged and unexplained decrease in sports performance and fatigue and is usually associated with severe psychological manifestations.

The above research indicates OTS “appears to be a maladapted response to excessive exercise without adequate rest, resulting in perturbations of multiple body systems (neurologic, endocrinologic, immunologic) coupled with mood changes.” 

This means that if you are running too much and your recovery isn’t keeping up, you will experience physical and mental issues. 

Whether training for a marathon, half marathon, or just running to stay fit, we often find ourselves immersed in the numbers game—tracking mileage, monitoring pace, and analyzing heart rate data.

Yet, amidst our pursuit of performance gains, it’s crucial to remember the delicate balance between pushing our limits and listening to our bodies.

However, the allure of mileage buildup must be approached with caution. While the “more is better” mentality prevails, elite runners and cardiologists alike warn against the dangers of overtraining.³Williams, P. T., & Thompson, P. D. (2014). Increased Cardiovascular Disease Mortality Associated With Excessive Exercise in Heart Attack Survivors. Mayo Clinic Proceedings, 89(9), 1187–1194. https://doi.org/10.1016/j.mayocp.2014.05.006 ⁴COATES, A. M., MILLAR, P. J., & BURR, J. F. (2018). Blunted Cardiac Output from Overtraining Is Related to Increased Arterial Stiffness. Medicine & Science in Sports & Exercise, 50(12), 2459–2464. https://doi.org/10.1249/mss.0000000000001725

Rule of thumb dictates a gradual increase in mileage (10% per week), incorporating rest days, active recovery, and cross-training to prevent running injuries and burnout.

In marathon training and running generally, the emphasis on quality over quantity cannot be overstated.

Balancing hard workouts with easy days is essential for sustained progress and injury prevention. Moreover, integrating strength training and proper warm-up routines complements running performance and reduces the risk of injury.

Understanding individual fitness levels and personalizing training plans is paramount. Not everyone can—or should—run every day, and that’s okay. Active recovery days and cross-training activities contribute to overall fitness and prevent the dreaded plateau.

Ultimately, as runners, we must listen to our bodies and read the signs.

Recognizing warning signs of overtraining, such as decreased performance, excessive fatigue, and elevated resting heart rate, is crucial for long-term success.

If you notice an elevated heart rate for a long period, consultation with a cardiologist or fitness professional can provide valuable insight into optimizing training regimens while safeguarding heart health.

So lace up those running shoes, but do so with mindfulness and respect for your body’s limits. In the journey towards improved performance and health, remember: it’s not just about how far we run, but how much we enjoy it.

If you enjoyed this article, check out:

My Story of Overtraining

References

• 1
  Mellinger, S., & Neurohr, G. A. (2019). Evidence based treatment options for common knee injuries in runners. Annals of Translational Medicine, 7(S7), S249–S249. https://doi.org/10.21037/atm.2019.04.08
• 2
  Kreher, J. B., & Schwartz, J. B. (2012). Overtraining Syndrome. Sports Health: A Multidisciplinary Approach, 4(2), 128–138. https://doi.org/10.1177/1941738111434406
• 3
  Williams, P. T., & Thompson, P. D. (2014). Increased Cardiovascular Disease Mortality Associated With Excessive Exercise in Heart Attack Survivors. Mayo Clinic Proceedings, 89(9), 1187–1194. https://doi.org/10.1016/j.mayocp.2014.05.006
• 4
  COATES, A. M., MILLAR, P. J., & BURR, J. F. (2018). Blunted Cardiac Output from Overtraining Is Related to Increased Arterial Stiffness. Medicine & Science in Sports & Exercise, 50(12), 2459–2464. https://doi.org/10.1249/mss.0000000000001725