Overtraining is a real risk for runners, whether you’re a competitive athlete logging big mileage or someone simply trying to stay consistent with training. When you’re balancing running with work, family, and everyday responsibilities, it’s easy to fall into the trap of squeezing in hard workouts whenever you can.
The problem is that stacking too many high-intensity or high-volume sessions without enough easy running and recovery can slowly drain your body rather than make it stronger.
Overtraining occurs when the stress from training exceeds your body’s ability to recover and adapt. And it doesn’t just affect beginners. In fact, experienced runners are often more vulnerable because they’re motivated, disciplined, and eager to improve—sometimes pushing mileage or intensity faster than their body can handle.
From a coaching perspective, one of the most important lessons for long-term progress is that fitness isn’t built only during workouts, but during recovery. The most successful runners understand that easy days, rest days, and proper recovery are not optional extras, but essential parts of the process.
Most recreational runners don’t have the luxury of structuring their day entirely around training and recovery, but the principle still applies. Prioritizing sleep, recovery runs, and strategic rest can make the difference between steady improvement and burnout.
That’s why every runner should understand the key signs of overtraining, the common causes behind it, and the strategies that help you recover and train sustainably over the long term.
What Are The Most Common Symptoms Of Overtraining?
Are you concerned that you may be experiencing overtraining syndrome? Here are the most common signs that can alert an endurance athlete that they are suffering from this complication:
- Tiredness or chronic fatigue
- Elevated resting heart rate: (3-5 beats higher than usual)
- Lack of interest in training
- Poor sleep
- Persistent muscle soreness, aches, and pains
- Slower recovery from physical activity
- Underperformance and fitness plateaus
- Hard to concentrate and focus
- Common cold-like symptoms (low immune system)
- Overuse injuries
- Mood changes
- Irregular menstrual cycles
- Loss of appetite and/or weight loss
What Are The Common Causes Of Overtraining?
#1: Doing Too Much Too Soon
This often happens when runners begin to overreach—increasing weekly mileage too quickly or piling on too much intensity in their training.
Patience is key.
One of the simplest ways to reduce your risk of overtraining is to follow the 10% rule: increase your weekly mileage or training volume by no more than about 10% at a time.
This gradual progression gives your body time to adapt to the added stress, helping you build fitness steadily while lowering the risk of injury and burnout.
#2: Skipping Rest Days
It’s amazing how many runners don’t take a rest day. Remember, it’s not about constantly pushing your body to perform better; the key to building fitness is allowing your body time to recuperate and absorb the extra training load.
Taking at least one day off per week will reduce the risk of burning out and help you recover fully for your next session. You can even continue light activity by doing rest day workouts; just be mindful of the intensity.
This is especially true when training for a marathon or other distance event where your training mileage is constantly increasing. That rest period is crucial.
#3: Racing Too Often
It’s only natural to get hooked on racing. Not only do you get a chance to see how your training is progressing, but there are social benefits as the race atmosphere is quite enjoyable.
Yet, pushing your body to the limit week after week will eventually lead to burnout.
The races will not only take their toll physically, but you’ll likely feel mentally exhausted, too.
Be strategic about your race calendar. Limit your all-out races to a few key events each season and treat the others as controlled efforts or training runs.
Giving yourself time between races to recover—both physically and mentally—will help you stay motivated, perform better when it counts, and avoid the burnout that comes from racing too often.
#4: Not Getting Enough Sleep
The general rule of thumb is that each adult should aim for 8 hours of sleep per night. For those who regularly train, the advice is to add a little more, ideally around 9 hours, if possible.
Therefore, try to ensure you get sufficient sleep, especially if your program includes high-intensity sessions. Your body needs enough time to rest to continue training at its full potential.
#5: Not Giving Your Body Time to Bounce Back
High-intensity sessions, such as long repetitions, fartlek, short speed intervals, and threshold runs, are excellent ways to build fitness.
In fact, one of the legendary British coaches, Frank Horwill, stated that to improve your performance, you’ll have to do some of your running between 80-100% of your V02 max.
However, the stressors your body experiences during these sessions cannot be taken lightly. It is recommended that you allow at least 48 hours between these hard sessions. Any less, and your body will not have sufficient time to rest and recover.
#6: Neglecting Nutrition After Your Run
One well-known theory in sports science is that you should maximize your body’s recovery from a hard training session by focusing on the 30-minute window immediately after it.
Eat a small snack, such as a banana or peanut butter sandwich, or drink a shake, and you’ll kick-start the body’s recovery and help replenish depleted glycogen stores. Ensure your snack has both protein and carbohydrates.
Related: Is Overtraining Just Undereating? Here’s The Compelling New Evidence
#7: Not Staying Properly Hydrated
Your performance during a training session will partly depend on your hydration before starting. It’s recommended you drink 2-3L of water a day.
If you’re doing a hard session in the evening, consider consuming a small amount of an isotonic drink 1 hour before starting to ensure you’re as hydrated as possible and not begin in a dehydrated state.
#8: Racing Every Rep In Training Sessions
This is akin to doing too many races, which we discussed earlier.
Most runners are naturally competitive and like to push themselves in training, but it is not advisable to go as hard as possible in each repetition.
It’s always better to finish a training session feeling that you have some gas left in the tank.
How Do I Recover From Overtraining?
First and foremost, I suggest consulting a qualified healthcare professional.
This ensures you receive an accurate diagnosis and can rule out other underlying conditions that may mimic overtraining symptoms, such as iron deficiency, thyroid issues, or anemia.
A medical professional can also guide you in creating a tailored recovery plan to help you rebound more efficiently and safely, so you can get back to training stronger.
#1: Rest, Rest, And Then Rest Some More
The most important step is to rest, truly rest, for at least two to six weeks, depending on the severity of your symptoms. Your healthcare provider can give you a specific timetable to follow for your case.
This may mean taking all of the time off from training or switching to very low-intensity activities, such as walking, yoga, or light stretching. You’ll know you’re starting to recover when your energy levels, sleep, mood, and motivation begin to normalize.
#2: Focus On Your Nutrition
Nutrition is also a key component to staying energized and healthy. Adjusting your calorie intake and focusing on consuming a balance of carbohydrates and protein helps repair muscle damage and replenish depleted glycogen stores.
Be sure to eat consistently, and never skip post-workout meals, even when the effort feels light. If you’re struggling with appetite or unsure whether you’re eating enough, consulting a sports nutritionist might be helpful.
#3: Get Enough Sleep
Sleep should become a non-negotiable part of your recovery. Aim for 8–10 hours of quality rest each night, and if you’re lucky enough to have time, include naps.
#4: Manage Your Stress
Use tools such as mindfulness, meditation, or journaling to help regulate your stress levels.
#5: Ease Back Into Training Slowly
When you’re ready to return to training, start slow with walks, gentle jogs, or cross-training.
Monitor how your body responds and avoid jumping into high-intensity sessions until you’ve seen several consistent weeks of recovery.
#5: Reassess Your Training
Take this as a lesson to reassess your training method and plan.
Ensure you include regular rest days, recovery weeks, and balance your volume and intensity. With the right strategy and enough patience, you’ll return stronger and smarter than before.
How Can I Avoid Overtraining?
Avoiding overtraining is a fundamental skill and one of the most valuable abilities a runner can develop. No one knows your body better than you, so take the time to tune in and notice the early signs of fatigue, aches, or persistent soreness.
With experience, you’ll get better at understanding the right balance of low-intensity and high-intensity workouts your body can handle without tipping into burnout. Striking this balance is key to staying healthy, improving performance, and keeping the joy of running alive.
Above all, aim for consistency over perfection. Prioritize recovery, listen to your body, and watch for early signs of overtraining. And don’t underestimate the power of cross-training, rest, and restorative activities to keep you strong, injury-free, and motivated for the long run.
If you want to take a deep dive into how running can improve mental health, check out this next guide:
Thanks for such a useful article. It’s a nice reminder of how important it is to slow down sometimes and conquer the big challenge of body not being able to keep up with the ambitious mind.