Muscle soreness after exercise is common, especially when you start a new routine or do something your body is not used to.
A day or two later, climbing the stairs feels like a serious sporting event!
That familiar ache is often delayed-onset muscle soreness, or DOMS. It can happen after unfamiliar or more demanding exercise and may be especially noticeable after activities that place a new strain on your muscles. ACSM notes that DOMS commonly lasts for several days and that gradually increasing a new exercise programme can reduce how severe it becomes.
But not every ache after exercise is ordinary muscle soreness.
Understanding the difference between normal post-exercise soreness, excessive fatigue and pain that may indicate an injury can help you train more safely and consistently.
What Is Delayed-Onset Muscle Soreness?
Delayed-onset muscle soreness is the discomfort that develops after exercise rather than during it.
It is particularly common when you:
- start exercising after a period of inactivity
- try a new exercise
- increase the intensity or amount of training
- perform movements your muscles are not accustomed to
- do demanding resistance training
The soreness often becomes noticeable during the first day or two after exercise and then gradually settles. ACSM’s consumer guidance says DOMS generally lasts only a few days, commonly around 3 to 5 days.
You do not have to experience soreness for an exercise programme to be effective.
In fact, soreness should not be used as your measure of whether a workout “worked”.
Why Do Your Muscles Feel Sore After Exercise?
When you expose your muscles to an unfamiliar workload, they have to adapt to a new physical demand.
That can lead to temporary soreness and stiffness.
Some types of muscle action, particularly eccentric movements where a muscle lengthens while producing force, can produce more soreness. ACSM notes that new and strenuous exercise is particularly likely to cause DOMS.
The important point is that your muscles are adapting.
You do not need to deliberately make yourself extremely sore to become fitter or stronger.
When Does Muscle Soreness Usually Start?
DOMS does not usually appear at the exact moment you finish your workout.
You may feel fine immediately afterwards and then notice stiffness or aching later.
That is one reason beginners sometimes make the mistake of doing far too much on their first exercise session.
They feel fine at the gym and assume they could have done more.
The following day tells a different story.
A gradual start gives your body time to adapt.
How Long Does Muscle Soreness Last?
There is no identical timetable for everyone.
Mild to moderate soreness usually settles over several days. ACSM describes DOMS as typically lasting around 3 to 5 days.
If soreness continues to worsen, remains severe, or does not behave like ordinary post-exercise soreness, consider whether there may be another problem.
Persistent or unusual pain deserves more attention than simply calling it DOMS.
Muscle Soreness vs Exercise Injury
This is one of the most useful distinctions to understand.
Typical DOMS tends to:
- develop hours after unfamiliar or demanding exercise
- affect the muscles you worked
- feel like aching, stiffness or tenderness
- gradually improve over several days
An injury may be more likely when you experience:
- sudden pain during the exercise
- a sharp or severe pain
- significant swelling
- major loss of movement or function
- obvious bruising
- pain that keeps getting worse
- symptoms that do not fit the exercise you performed
ACSM specifically advises that acute pain occurring during exercise can signal a problem and that an activity should be stopped rather than pushed through.
You do not need to diagnose the injury yourself.
If you are concerned, seek appropriate medical advice.
Should You Exercise When You Are Sore?
Sometimes.
The answer depends on how sore you are and what you plan to do.
Light activity may be comfortable for some people, and ACSM notes that light activity should not generally impair recovery. However, it also notes that there is not much evidence that light activity actually speeds recovery.
You could therefore:
- take an easy walk
- do gentle movement
- train a different muscle group
- reduce the intensity
- shorten the session
- take a rest day
You do not have to turn every sore day into another hard workout.
If soreness is severe enough to make normal movement difficult, it is sensible to give the affected muscles time to recover rather than training them hard again.
Don’t Use “No Pain, No Gain” as Your Training Plan
Pain is not a requirement for progress.
A good workout can challenge you without leaving you injured or barely able to move the next day.
ACSM explicitly notes that pain does not need to be present to achieve improvements in fitness and that pain during exercise may indicate a need to reduce or stop the activity.
The goal is not to see how much discomfort you can tolerate.
The goal is to create a training stimulus your body can adapt to and repeat.
Start Slowly When You Are New to Exercise
If you have been inactive for a long time, avoid trying to make up for lost years in a single weekend.
Start with an amount of exercise you can manage comfortably.
For example, you might begin with:
- short walks
- a small number of strength exercises
- light resistance
- a modest number of sets
- a few sessions spread across the week
Then increase the challenge gradually.
ACSM identifies gradual progression as one of the best ways to reduce the severity of DOMS in a new programme.
Increase One Thing at a Time
When your fitness improves, you can increase your workload.
But you do not need to increase everything at once.
You might increase:
- duration
- resistance
- repetitions
- distance
- training frequency
- exercise difficulty
Making several large changes simultaneously can make it harder to know why you have become excessively sore or fatigued.
A more gradual approach is easier to manage.
Give Your Muscles Time to Recover
Recovery is part of training.
Your body needs time between demanding sessions to repair and adapt.
That does not necessarily mean lying on the sofa all day.
Recovery can include:
- normal daily movement
- easy walking
- adequate sleep
- regular balanced meals
- enough fluids
- easier training days
- rest when appropriate
The exact recovery required depends on what you have done, your fitness, your age, your health and how well you normally recover.
Sleep Matters
A hard workout followed by consistently poor sleep is not a great recipe for recovery.
Make sleep part of your fitness routine rather than something left over after everything else has been completed.
Aim for a regular sleep pattern and give yourself enough opportunity to sleep.
If you are regularly exhausted despite getting reasonable sleep, the issue may be more than ordinary post-exercise fatigue.
Eat Normally After Exercise
There is no need for a special collection of “recovery” products for an ordinary workout.
For most people, a balanced eating pattern that provides enough energy and nutrients is the sensible foundation.
Depending on the type and amount of exercise you do, a meal or snack containing protein and carbohydrate can fit naturally into your normal diet.
The important thing is not to turn recovery into another complicated project.
What About Stretching?
Stretching can be useful for flexibility and may feel comfortable after exercise.
However, it should not be presented as a guaranteed cure for DOMS.
ACSM notes that stretching has not been shown to prevent or reduce DOMS symptoms.
So stretch because it forms part of an activity you enjoy or because it helps your mobility, not because you expect it to magically remove soreness.
What About Heat, Cold or Massage?
People use many recovery techniques, and some may make soreness feel more comfortable.
But comfort is not the same thing as speeding the underlying recovery process.
You do not need an elaborate recovery routine after every workout.
Try the simple basics first:
Gradual training
Adequate sleep
Normal nutrition
Appropriate hydration
Reasonable rest
Gentle movement when comfortable
These fundamentals are more important than chasing the latest recovery gadget.
Why Beginners Often Get Very Sore
New exercisers are particularly vulnerable to doing too much too soon.
You may feel enthusiastic because you have finally decided to get fit.
That is great.
But enthusiasm is not the same thing as conditioning.
Your muscles, connective tissues and general fitness need time to adapt.
The best beginner workout is not the one that leaves you unable to move.
It is the one that you can recover from and repeat.
What If You’re Tired as Well as Sore?
Muscle soreness and general fatigue are not exactly the same thing.
A demanding session can leave you temporarily tired, especially if you are not used to exercise.
But severe or persistent fatigue should not automatically be blamed on your workout.
Look at the wider picture:
- Have you been sleeping badly?
- Have you increased your training too quickly?
- Are you eating regularly?
- Are you recovering between sessions?
- Are you trying to exercise hard every day?
If fatigue remains significant or is affecting everyday life, consider speaking with an appropriate healthcare professional rather than simply exercising harder.
When Should You Take a Rest Day?
A rest day can be useful when:
- your muscles are significantly sore
- normal movement is uncomfortable
- you feel unusually tired
- your performance has clearly dropped
- you are recovering from a demanding session
- you are unwell
Rest does not mean your fitness programme has failed.
Recovery days are part of a sustainable routine.
You can also use an easier activity day rather than stopping all movement, provided it feels appropriate.
When Is Muscle Pain a Reason to Stop?
Stop exercising and seek appropriate medical advice if you experience symptoms that could indicate something more serious.
These can include:
- severe or sudden pain
- chest pain
- fainting
- severe shortness of breath
- major swelling
- significant loss of strength or movement
- dark urine after very hard exercise
- symptoms that are rapidly worsening
Very severe muscle pain, marked weakness or dark urine after strenuous exercise can be associated with rhabdomyolysis, a serious condition that requires urgent medical evaluation.
Do not assume that severe symptoms are “just DOMS”.
What About Training Through Soreness?
There is a difference between working around mild soreness and deliberately ignoring severe pain.
If your legs are mildly sore after squats, you may decide to walk or train another part of the body.
If you are struggling to climb stairs because your legs are extremely painful, repeating a hard leg session may not be sensible.
Adjust the training to the condition of your body.
That is not weakness.
It is good training judgement.
How to Prevent Excessive Soreness
You cannot guarantee that you will never become sore.
But you can reduce the likelihood of becoming excessively sore.
1. Start gradually
Give your body time to adapt.
2. Increase the workload progressively
Small increases are easier to recover from.
3. Avoid doing a completely new, extremely hard workout
Novelty plus excessive intensity is a common recipe for severe DOMS.
4. Give hard-working muscles time to recover
You do not have to train the same muscles hard on consecutive days.
5. Be consistent
Regular training usually becomes easier as your body adapts to repeated activity. ACSM notes that repeated exposure to the same type of exercise generally produces less soreness over time.
A Simple Beginner Approach
If you are starting from a low level of fitness, your first few weeks could be intentionally modest.
For example:
Monday: 10–20 minute walk
Tuesday: Short beginner strength session
Wednesday: Easy movement or rest
Thursday: 10–20 minute walk
Friday: Short beginner strength session
Saturday: Easy walk or another enjoyable activity
Sunday: Rest
This is only an example.
Your own programme should reflect your health, ability and goals.
Current guidance encourages adults to build activity gradually and, for general health, include muscle-strengthening activity on at least two days each week.
What If Soreness Keeps Coming Back?
If you are regularly becoming excessively sore after ordinary training, reconsider the programme.
Ask:
Am I increasing the workload too quickly?
Am I recovering enough between sessions?
Am I doing more than I need to?
Is my technique appropriate?
Am I repeatedly training the same muscles hard?
A qualified exercise professional may be able to help you adjust the programme.
If the pain seems unusual or continues despite changes to your routine, speak with a healthcare professional.
Soreness Is Not the Goal
This may be the most important message in the entire article.
You do not need to be sore after every workout.
You do not need to feel destroyed.
You do not need to prove how hard you trained by struggling to sit down the next morning.
Fitness is built through regular activity and appropriate progression.
Soreness is sometimes a side effect of adaptation.
It is not the trophy.
The Bottom Line
Muscle soreness after exercise is common, particularly when you start a new activity or increase your training.
Delayed-onset muscle soreness usually appears after exercise rather than during it and generally settles over several days.
Light movement may be comfortable when you are mildly sore, but severe soreness is a reason to ease off and allow recovery.
Start gradually.
Increase your workload progressively.
Give your body time to adapt.
Sleep well, eat normally and stay appropriately hydrated.
And do not confuse pain with progress.
If you experience sudden, severe or unusual pain, significant weakness, dark urine or other concerning symptoms, seek medical attention rather than assuming you simply trained hard.
A good exercise programme should make you fitter and stronger over time.
It should not leave you wondering whether you need a crane to get out of bed.
Recommended Further Reading
How to Create a Personal Fitness Plan You Can Stick To
Why Is Exercise Motivation So Difficult? How to Stay Consistent
Too Tired to Exercise? How to Get Active When You’re Exhausted
Toning Exercise Myths: What Really Works?
Medical Disclaimer
This article is for general educational purposes and is not a substitute for personalised medical advice, diagnosis or treatment. If you have severe or persistent pain, unusual fatigue, a medical condition, an injury or concerns about exercising safely, speak with an appropriately qualified healthcare professional.
Sources
- American College of Sports Medicine — Delayed Onset Muscle Soreness (DOMS)
- Centers for Disease Control and Prevention — Adult Activity: An Overview
- Centers for Disease Control and Prevention — Adding Physical Activity as an Adult