Muscle Soreness After Running: Causes and How to Recover

If you have ever finished a run and woken up the next day with sore legs, you are not alone. Muscle soreness after running is one of the most common experiences for both beginner runners and runners who are restarting their running routine.

For many women I work with, soreness quickly leads to doubt. They start wondering if they pushed too hard, if their body is not built for running, or if running is simply too difficult to maintain.

The truth is that some soreness is completely normal. However, excessive soreness often tells us something important about how we are training. Understanding why it happens can help you avoid the stop-start cycle and build a more sustainable running habit.

 Why muscles get sore after running

The type of soreness runners experience after a workout is called Delayed Onset Muscle Soreness, often referred to as DOMS.

This soreness usually appears 12 to 48 hours after exercise and happens when your muscles experience microscopic stress during activity. Running places repeated load on the muscles of the legs as they absorb impact and stabilize your body.

During this process, tiny muscle fibers experience small amounts of damage. Your body then repairs these fibers, and during that repair process the muscle becomes stronger and more resilient.

This is a normal part of physical adaptation.

In other words, mild soreness is often simply a sign that your body is adjusting to the training stimulus.

When soreness is a sign you did too much

While mild soreness is normal, very intense soreness is often a sign that progression happened too quickly.

This is especially common when runners: 

• Increase distance too quickly

• Add intensity too soon

• Return to running after a break and try to resume their previous level immediately

When the body does not have enough time to adapt, muscles experience more stress than they are prepared for, which can lead to significant soreness.

For runners who are trying to build consistency, this can be a problem. If every run leaves you extremely sore, it becomes difficult to run again a few days later, and that is how many runners fall into a pattern of stopping and restarting.

Gradual progression is what allows the body to adapt without overwhelming it.

Why gradual progression matters

When you build your running volume slowly, your body adapts step by step. Muscles strengthen, connective tissues become more resilient, and recovery becomes faster.

Interestingly, runners who train consistently and gradually often experience less soreness than those who run sporadically but push very hard each time.

Consistency creates adaptation.

Pushing too far too fast creates setbacks.

For example, right now I am in the early stages of training for a marathon. My long runs happen on Saturdays and currently range from about one hour to an hour and a half. As the race approaches, those long runs will gradually increase in duration.

The important detail here is that the progression is gradual. Because I have been running consistently for a long time, my body can adapt to the increasing load. Jumping straight to much longer runs would likely lead to unnecessary fatigue and soreness.

How to reduce muscle soreness after running

If you want to keep running consistently, recovery habits matter just as much as the runs themselves. Here are a few strategies that can help reduce muscle soreness. 

1. Increase training gradually

The most effective way to reduce soreness is to build volume progressively.

Small increases allow muscles, tendons, and joints to adapt to the demands of running without excessive stress.

This is one of the main reasons structured training plans often increase distance slowly over several weeks.

2. Fuel your recovery

Nutrition plays a key role in muscle repair.

After a run, your body needs carbohydrates to replenish energy stores and protein to repair muscle tissue. When runners under-fuel, recovery tends to take longer and soreness may last longer as well.

Even a simple balanced snack after a run can support the recovery process. I created a Free Nutrition Guide for Runners for you to download. Get it here: Free Nutrition Guide for Runners.

3. Expect long runs to create more fatigue

Long runs place greater stress on the body, so it is normal to feel more tired afterward.

When I complete my Saturday long run, I know I will likely feel more fatigued that day. Instead of planning a packed schedule, I intentionally leave space to relax and recover.

Allowing time for recovery helps the body absorb the training rather than fight against it.

4. Use simple recovery habits

Some simple recovery practices can also help reduce stiffness in the muscles.

One recovery habit that I personally find helpful after longer runs is taking a warm bath. The heat can help relax muscles and promote circulation, which many runners find soothing after a demanding run.

Other runners benefit from light movement the next day, such as walking or gentle mobility work. The goal is simply to help the body recover without adding additional stress.

The goal is not to feel destroyed after every run

A common misconception is that a workout only counts if it leaves you extremely sore.

For endurance sports like running, the goal is different. The goal is to create repeatable training stress that your body can recover from quickly.

When your runs leave you feeling challenged but still able to train again a few days later, that is usually a good sign that your training load is appropriate.

Consistency is what builds endurance—not exhaustion.

 A simple check-in for runners

If you regularly experience significant muscle soreness after running, ask yourself one question:

Did I increase something too quickly?

It might be distance, pace, or the number of runs per week. Small adjustments in progression often make the biggest difference in how your body feels.

Running should challenge you, but it should also allow your body to adapt and grow stronger over time. That way you can keep running consistently and end the start-stop cycle.