Why Do Muscles Feel Sore After Exercise
In this post
You finish a workout feeling fine. You walk home, you eat dinner, you sleep well, and you think nothing of it. Then the next morning you try to get out of bed, and your legs refuse to cooperate. The stairs feel like a mountain. Lifting your arms to wash your hair hurts. Sitting down on a chair takes careful planning. You did not feel this bad yesterday, so why does it hurt so much today? The answer is one of the most common experiences in exercise, and it has a name: delayed onset muscle soreness. It is the ache that arrives a day or two after exercise, and it happens because exercise, especially new or harder exercise, leaves tiny strains in your muscles that your body then has to repair.
That soreness can be confusing, because it does not behave like most pain. If you cut your finger, it hurts at once. If you twist your ankle, it hurts at once. But muscle soreness after exercise waits. It creeps in slowly, often when you are asleep, and it is worst the morning after, or even the morning after that. Then, just as slowly, it fades over two or three days, and your muscles feel normal again, often a little stronger than before. To understand why it works like that, you need to understand what exercise actually does to a muscle, and how the body repairs the damage.
What Soreness Really Is
A muscle is made of thousands of long, thin fibres, bundled together like the strands of a rope. When you use a muscle, those fibres contract, which means they shorten and pull, and then they relax and lengthen again. That is how you lift, walk, run and carry things. When the work is familiar and moderate, the fibres handle it easily. But when the work is new, harder, or longer than usual, the fibres are pushed beyond what they are used to, and some of them suffer tiny strains. These are not the kind of injury that shows up on a scan or needs a bandage. They are microscopic, which means they are far too small to see, but they are real, and your body treats them seriously.
When a muscle fibre is strained, the body sends a repair crew to fix it. Blood flow to the area increases, and the body’s repair system starts clearing away damaged parts of the fibre and building new, stronger tissue in their place. That repair work causes a small amount of swelling inside the muscle, and it makes the nerve endings in the area more sensitive. That sensitivity is what you feel as soreness. The muscle is not broken. It is under repair, and the soreness is the feeling of that repair work in progress. It is uncomfortable, but it is also a sign that your body is doing its job.
It is worth clearing up an old misunderstanding here, because many people still believe it. For years, people were told that muscle soreness is caused by lactic acid building up in the muscles during exercise. That is not correct. Lactic acid, or lactate, does build up when you exercise hard, and it can make your muscles burn while you are working. But it clears from your muscles within an hour or two after you stop. It cannot explain soreness that arrives the next day and lasts for three days. The real cause is the tiny strain to the muscle fibres and the repair process that follows. The burning feeling during exercise and the aching feeling the next day are two different things, with two different causes.
Soreness is also different from tiredness. Tired muscles feel weak and heavy, and they recover quickly with rest. Sore muscles feel tender when you touch them or stretch them, and they hurt when you try to use them in the same way again. You can be tired without being sore, and you can be sore without being tired. The soreness tells you that the muscle has been challenged in a new way, and that it needs time to recover and adapt. That is a useful message, even if it is an uncomfortable one.
Why It Usually Arrives the Next Day, Not Straight Away
The delay is the most puzzling part of muscle soreness, so it deserves a clear explanation. The tiny strains happen during the exercise itself, while you are working. But the soreness does not arrive at once, because the soreness is not caused directly by the strain. It is caused by the body’s response to the strain, and that response takes time to build up. Think of it like a bruise. If you bump your leg, the bruise does not appear in the same second. It appears over hours, as blood collects under the skin and the area becomes tender. Muscle soreness works in a similar way, though the process is inside the muscle rather than under the skin.
After exercise, the repair process begins quietly. The body sends extra blood to the worked muscles, and the small blood vessels in the area become a little more open, so that repair materials can reach the damaged fibres. That extra blood and fluid causes a small amount of swelling inside the muscle. Because the muscle is wrapped in a tight covering, even a small amount of swelling puts pressure on the nerve endings inside it, and that pressure is felt as an ache. The swelling and the sensitivity build up over twelve to twenty-four hours, which is why you often feel fine on the evening of the exercise and sore the next morning. The peak usually comes between twenty-four and forty-eight hours after the exercise, and then the repair work starts to wind down, the swelling eases, and the soreness fades.
The type of exercise changes the timing too. Exercise that involves lowering a weight slowly, or walking downhill, or running downhill, tends to cause more soreness than exercise that involves lifting or pushing. That is because when a muscle lengthens while it is still working hard, as it does when you lower yourself down slowly or brake your body on a downhill slope, the fibres are under more strain. That kind of work is called eccentric exercise, and it is the most likely to leave you sore the next day. That is why the first day of a new walking routine in hilly country, or the first session of lifting weights, can leave you much sorer than a flat walk or a familiar activity.
Sleep plays a part in the timing as well. Much of the body’s repair work happens while you sleep, when your body is at rest and can focus on recovery. You go to bed feeling fine, and while you sleep your body gets to work on the strained fibres, sending blood, clearing waste and rebuilding tissue. You wake up to the results of that work: the swelling, the sensitivity, and the ache. In a way, the morning soreness is the evidence that your body worked hard overnight to fix what the exercise challenged. It is not a pleasant way to wake up, but it is a sign that the repair system is active.
The Tiny Tears: How Muscles Get Stronger
The idea that exercise causes tiny damage to muscles can sound alarming, but it is actually the way muscles grow stronger. Your body is built to adapt. When a muscle is challenged by work it is not used to, the body does not just repair it back to its old state. It repairs it a little stronger than before, so that the next time you do the same work, it will be easier. This is how a person who starts lifting weights gradually becomes able to lift more, and how a person who starts walking long distances gradually finds the same distance easier. The soreness is the price of that adaptation, and it is usually worst at the start, when the challenge is newest.
The process works in stages. First, the strained fibres are cleared of damaged material. Then, new protein is built into the fibres, making them thicker and stronger. At the same time, the connections between the fibres and the tendons, the tough cords that join muscle to bone, become stronger as well. The nervous system also adapts. It learns to use the muscle more efficiently, recruiting more fibres at the right time and coordinating the movement better. That is why the second time you do an exercise, it often feels smoother and less awkward than the first time, even before your muscles have grown visibly stronger. Your brain has learned the movement, and your muscles have started to adapt.
This adaptation is also why soreness fades with repetition. The first time you do a new exercise, you may be sore for three days. The second time, you may be sore for two days. By the fourth or fifth time, you may feel only a mild ache, or nothing at all. That does not mean the exercise has stopped working. It means your body has adapted to it, and the same work no longer strains the fibres in the same way. To keep improving, people usually increase the challenge gradually, by doing a little more, or going a little further, or adding a little more weight. But the increase should be small. A sudden, large jump in effort is the fastest way to bring back severe soreness, and it is also the fastest way to risk a real injury.
It is important to understand that soreness is not a reliable measure of how good a workout was. Some people think that if they are not sore, the exercise did not work, and that if they are very sore, it must have been a great workout. Neither is true. A good workout can leave you with no soreness at all, especially once your body is used to it. And a very sore workout is not necessarily a better one. It may simply mean the exercise was too new or too much, too soon. The real measure of progress is whether you can gradually do more over weeks and months, not how much you ache the next morning.
Why New Exercises Hurt More Than Familiar Ones
If you have ever wondered why a familiar walk leaves you fine but a new activity leaves you sore for days, the answer is that your body is specific in how it adapts. A muscle does not become generally strong. It becomes strong for the particular movements it practises. A person who walks every day has strong walking muscles, but if that same person tries to climb a long flight of stairs, or tries a new sport, or helps a friend move furniture, they may be sore the next day. The movements are different, the muscles are used at different angles, and the fibres are strained in ways they are not used to.
That is why the first session of any new activity is the one that hurts most. Your body has no experience of that movement, and it has not built up the strength and coordination for it. The first time you try a new exercise class, the first time you go swimming after a long break, the first time you dig in a garden, or the first time you play a sport you have not played for years, your muscles are being asked to do something unfamiliar. They cope, but they pay for it with soreness. The second time is easier, and the third time easier still, because your body is learning and adapting with every session.
Changes in familiar exercise can have the same effect. If you usually walk on flat ground and then walk up a steep hill, your leg muscles work differently, and you may be sore. If you usually lift light weights and then try heavier ones, your muscles are challenged in a new way. If you exercise for much longer than usual, even at a familiar activity, the extra time adds up, and the fibres are strained by the sheer amount of work. The rule is simple: any change that makes the work new, harder or longer than your body is used to can bring soreness, and the bigger the change, the sorer you are likely to be.
This is also why taking a long break from exercise brings the soreness back. If you exercise regularly for months and then stop for several weeks, your muscles gradually lose some of their adaptation. They become less used to the work, and when you start again, the first few sessions feel like starting over. That is normal, and it is not a sign that you have lost all your fitness. Your body remembers the movement, and it adapts back more quickly the second time than it did the first time. But the soreness in those first sessions back is real, and it is a reminder to start gently and build up gradually rather than trying to pick up exactly where you left off.
What Makes Soreness Stronger or Weaker
Not everyone gets the same amount of soreness from the same exercise, and the same person can get different amounts on different days. Several factors shape how sore you feel. The first is how new the exercise is, as explained above. The second is how hard you worked. A gentle walk is unlikely to leave you sore, because it does not strain the fibres much. A hard, long session with many new movements is much more likely to. The third is how long you worked for. A short session causes less strain than a long one, even if the intensity is the same.
Your general state on the day matters too. If you are well rested, well fed and well hydrated, your muscles cope better with exercise and recover more smoothly. If you are tired, hungry, or short of water, your muscles are already under strain before you start, and the exercise adds to it. That is why a workout after a poor night’s sleep or after a long day without food can leave you sorer than the same workout on a good day. Your body is not a machine that performs the same way every day. It is a living system, and its condition on the day shapes how it responds.
Age makes a difference as well, though it is not the whole story. Older muscles recover more slowly than younger ones, and the soreness may last a day longer. That does not mean older people should avoid exercise. It means they should build up more gradually and allow a little more recovery time between hard sessions. Younger people recover faster, but they are not immune to soreness, and a sudden, hard new exercise can leave a young person just as sore as an older one. The key factor is not age alone. It is how big the jump is between what your body is used to and what you asked it to do.
The weather and the environment can play a small part too. Exercising in very hot weather, when you are sweating heavily and losing fluid, can make recovery harder. Exercising in cold weather, when your muscles are cool and stiff, can also make the strain worse if you start too quickly without warming up. A proper warm-up, which means a few minutes of gentle movement before the main exercise, helps your muscles warm up gradually and reduces the shock of sudden hard work. It will not prevent soreness completely, especially after a new exercise, but it makes the exercise safer and the recovery smoother.
Food, Water, Sleep and Recovery
Recovery is not just about resting. It is about giving your body what it needs to repair the strained fibres, and three things matter most: food, water and sleep. After exercise, your muscles need building material to repair themselves, and that material comes from the food you eat, especially protein foods such as eggs, lentils, beans, yoghurt, fish and meat. You do not need special supplements or expensive products. A normal, balanced meal with a good source of protein, some carbohydrate for energy, and vegetables for vitamins and minerals gives your body what it needs. Eating a proper meal after exercise is one of the simplest ways to support recovery, and skipping meals makes recovery slower and soreness worse.
Water matters too, because your muscles are mostly water, and the repair process needs fluid to work well. When you exercise, you lose water through sweat, and if you do not replace it, your muscles become dehydrated and stiffer, and the soreness feels worse. Drinking water regularly through the day, and drinking a little extra after exercise, helps keep the muscles in good condition. You do not need to drink huge amounts at once. Steady, regular drinking through the day is better than a sudden large amount. Your urine is a useful guide: if it is pale yellow, you are probably drinking enough. If it is dark, you need more water.
Sleep is the third pillar of recovery, and it may be the most important. During deep sleep, your body releases growth signals that help repair muscle tissue, and your muscles get the rest they need to rebuild. A poor night’s sleep after a hard workout means the repair work is less effective, and the soreness lasts longer. That is why the same exercise can leave you sore for two days after a good night’s sleep and for four days after a bad one. Getting enough sleep, seven to eight hours for most adults, is not a luxury after exercise. It is part of the exercise itself, because the benefits of the workout are built during the recovery that follows it.
Gentle movement also helps recovery, which surprises many people. When your muscles are sore, your instinct is to sit still and avoid moving them, because movement hurts. But complete rest is not always the best answer. Gentle, light movement, such as a slow walk, gentle stretching, or light household activity, increases blood flow to the sore muscles, and that blood flow brings oxygen and nutrients and carries away waste. That is why a sore person often feels worse after sitting still for hours and better after a short, gentle walk. The key is that the movement should be gentle. Hard exercise on sore muscles will strain them further and slow recovery. Light movement helps. Heavy work hurts.
How to Tell Normal Soreness from a Warning Sign
Most muscle soreness after exercise is normal, and it follows a clear pattern. It arrives a day after the exercise, it peaks within two days, it affects the muscles you used, it feels like a dull ache or tenderness rather than a sharp pain, and it fades over two to four days. It improves with gentle movement, and it gets better each day. If your soreness follows that pattern, it is almost certainly normal, and it will pass on its own as your body repairs the fibres.
But there are signs that mean something different is happening, and it is important to know them. Sharp pain, especially pain in one small spot, is not normal soreness. Pain that gets worse over days instead of better is not normal. Swelling that is large, or a muscle that looks bruised and swollen, or a joint that is swollen and hot, deserves attention. If you cannot move a joint properly, or if a muscle feels weak in a way that does not improve, that is a warning sign. And if your urine is very dark, or you feel very unwell, or you have a fever after exercise, those are signs that your body needs medical attention, not just rest.
A muscle strain, which is a more serious injury than ordinary soreness, usually happens during the exercise itself, not the next day. You feel a sudden sharp pain, or a popping feeling, and the muscle hurts at once. That is different from delayed soreness, which creeps in slowly. If you feel a sudden pain during exercise, stop at once. Do not try to push through it. Rest the muscle, and if the pain does not settle quickly, talk to a health professional. Pushing through a real injury makes it worse, and it can turn a small problem into a long one.
The general rule is simple and worth remembering. Soreness that is dull, spread through the muscles you used, arrives the next day, and fades over a few days is normal. Pain that is sharp, sudden, in one spot, or that gets worse, is not. This article is general information only, and it cannot diagnose your situation. If you are worried about a pain after exercise, or if it does not follow the normal pattern, the sensible step is to talk to a health professional who can look at it properly. That is not overreacting. It is taking care of your body.
My Take:
If you ask me what I think about muscle soreness after exercise, my honest answer is that it is both a nuisance and a good sign, and I think we should see it that way. It is a nuisance because it makes the stairs hurt, it makes sitting down an effort, and it makes you feel older than you are for a day or two. But it is a good sign because it means your body is doing exactly what it is supposed to do. You challenged your muscles, they were strained, and now your body is repairing them and making them stronger. The soreness is the feeling of that repair work, and without it there would be no progress. I think that is worth remembering on the morning when your legs refuse to work properly.
I think the most common mistake people make with soreness is to think it means they have done something wrong. They finish a new workout, they feel sore the next day, and they think they must have injured themselves, or that exercise is not for them. That is not true. Soreness after a new exercise is normal, it is expected, and it is part of the process. The real mistake would be to give up because of it. The person who tries a new activity once, gets sore, and never tries it again has learned the wrong lesson. The right lesson is that the first time is the hardest, the second time is easier, and by the fifth time the soreness is mostly gone. Your body adapts, but only if you give it the chance.
I also think people misunderstand what soreness means about the quality of a workout. I have heard people say that if they are not sore, the workout was wasted, and I think that is a harmful idea. It leads people to push themselves too hard, to try exercises they are not ready for, and to judge their progress by how much they hurt. A good workout does not have to hurt. In fact, the best workouts are often the ones that leave you feeling pleasantly tired but not sore, because your body was ready for them. Soreness is a sign that the work was new, not a sign that it was good. Once your body is used to an exercise, you can work hard without being sore, and that is a sign of progress, not a sign of failure.
There is another mistake I see often, and it is the opposite one: people who think soreness means they should stop exercising completely until it is fully gone, and then start again from the beginning. That is not the best approach either. Gentle movement helps sore muscles recover faster than complete rest, because it brings blood flow to the area. A slow walk, a gentle stretch, and normal daily activity are good for sore muscles. What you should avoid is doing the same hard exercise again while the muscles are still sore. That is like asking a builder to work on a wall that is still wet. Give the repair work time to finish, do something lighter in the meantime, and then go back to the harder exercise when the soreness has faded. That rhythm, work, rest, gentle movement, work again, is how progress happens.
I think the timing of soreness teaches a useful lesson about patience. In a world where people want results at once, soreness reminds us that the body works on its own schedule. You exercise today, and the soreness arrives tomorrow. You rest, and the strength arrives next week. You cannot rush that process, and trying to rush it usually makes things worse. I think that is a good lesson, not just for exercise but for life. The body rewards steady, patient effort far more than sudden, extreme effort. A person who exercises moderately three times a week for a year will be far stronger and healthier than a person who exercises extremely for one week and then gives up because they are too sore to move.
I also want to say something about starting again after a break, because I think that is where most people get hurt. You exercised regularly, you stopped for a month, and now you want to start again. Your mind remembers what you used to do, and it tells you to do the same amount. Your body has forgotten, and it is not ready. If you listen to your mind and ignore your body, you will be very sore, and you may injure yourself. If you listen to your body, start with half of what you used to do, and build up over two or three weeks, you will be back to your old level sooner and with far less pain. I think that is worth saying plainly, because pride is the enemy of a good comeback. Start small, be patient, and let your body catch up with your memory.
Food, water and sleep are the parts of recovery that people most often ignore, and I think that is a shame, because they matter as much as the exercise itself. You can do a perfect workout and then ruin the recovery by skipping dinner, drinking too little water, and sleeping for five hours. Your muscles need protein to rebuild, they need water to work properly, and they need sleep to do the repair. Those are not extras. They are part of the exercise. I would rather see a person do a moderate workout and then eat well, drink well and sleep well than see a person do a hard workout and then ignore all three. The first person will make steady progress. The second person will be sore, tired and frustrated, and will wonder why exercise does not seem to work for them.
I think there is also a quiet satisfaction in soreness that people do not talk about enough. It is the feeling of having used your body properly, of having done something real with your muscles. A labourer who is sore after a hard day knows that feeling. A person who has just finished a long walk in the hills knows it too. The soreness is uncomfortable, but it is also proof that you did something, that your body worked, and that it is now getting stronger. I do not think we should pretend soreness is pleasant, because it is not, but I do think we should recognise it for what it is: a normal, healthy response to a challenge, and a sign that your body is adapting.
My advice, in plain words, is this. When you start a new exercise, expect to be sore, and do not panic when it arrives. Start gently, increase the effort a little at a time, and give your body two or three days to recover after a hard session. Eat a proper meal, drink enough water, and get a good night’s sleep. Move gently while you are sore, but do not do the same hard exercise again until the soreness has faded. And if the pain is sharp, or in one spot, or getting worse, or if you feel unwell, stop and talk to a health professional. Those are simple rules, and they are enough. You do not need special products, special diets, or special routines. You need patience, good food, water, sleep, and a gradual approach.
I also think soreness teaches you to listen to your body, and that is a skill worth learning. Your body talks to you all the time, but most of us are not very good at listening. We ignore tiredness, we ignore thirst, we ignore the ache in our shoulders, and we carry on as if our bodies were machines. Soreness is a message that is hard to ignore, because it hurts when you move. It forces you to pay attention, and that attention is useful. It teaches you which muscles you used, how hard you worked, and how much recovery you need. Over time, you learn to read those messages better. You learn the difference between the dull ache of normal recovery and the sharp pain of something wrong, and that knowledge protects you for years. I think that is one of the hidden benefits of exercise: it teaches you to know your own body.
There is also a practical side to planning around soreness that people often miss. If you know that a new exercise will leave you sore for two days, you can plan for it. Do the new exercise on a day when the next day is not too demanding. Do not try a hard new workout the day before a long journey, a wedding, or a day of heavy physical work. Give yourself a quiet day after a hard session, when you can move gently and recover. That is not weakness. That is planning. Athletes plan their training and their recovery carefully, and ordinary people can do the same thing in a simple way. A little planning turns soreness from a surprise into something you expected and prepared for, and that makes it much easier to live with.
I want to say something about rest days, because I think people misunderstand them. A rest day is not a wasted day. It is the day when your body does the repair work that makes you stronger. If you exercise hard every day without rest, your muscles never get the chance to finish repairing, and you stay sore, tired and frustrated. If you exercise hard, then rest, then exercise again, your body has time to rebuild, and you come back stronger. I think of it like building a wall. You lay the bricks, and then you have to let the cement set before you lay more bricks. If you keep laying bricks on wet cement, the wall falls down. Rest is the cement setting. It looks like nothing is happening, but it is the most important part of the work.
Walking deserves a special mention here, because it is the best friend of a sore person. A slow walk after a hard workout does more for recovery than sitting on a sofa all day. It moves blood through the sore muscles, it loosens stiff joints, and it lifts your mood, which matters more than people think. When you are sore, you feel low and you want to stay still, but staying still makes the stiffness worse. A ten-minute walk around the house or the street, taken slowly, often makes you feel better than an hour of sitting. I am not talking about a hard, fast walk. I am talking about a gentle stroll, at a pace that feels comfortable. That is enough to help, and it is something almost anyone can do.
I also think it is important to be kind to yourself when you are sore, especially at the start. Many people start exercising with great enthusiasm, do too much on the first day, become very sore, and then feel like a failure. They are not a failure. They are a beginner, and beginners get sore. It is part of the process, and it passes. The kind thing to do is to start with less than you think you can do, accept the mild soreness that follows, and build up slowly. A person who starts with ten minutes and adds five minutes each week will still be exercising in a year. A person who starts with an hour, gets very sore, and gives up will not. I would rather be the first person. Slow progress that lasts is better than fast progress that stops.
There is one more thing I want to be honest about, and it is that soreness does not last forever, but fitness does need to be maintained. If you exercise for three months, get fit, and then stop for six months, you will lose much of what you gained. That is not a flaw in your body. It is how the body works. It keeps what you use, and it lets go of what you do not use. That is why the best exercise is the one you can keep doing for years, not the one that impresses people for a week. Find an activity you enjoy, do it regularly, accept the soreness that comes with new challenges, and keep going. That is the whole secret, and it is simpler than most people think.
One last thought. The soreness will fade, and when it does, you will be a little stronger than you were before. That is the deal your body offers you. A day or two of discomfort in exchange for a muscle that can do more next time. I think that is a fair deal, and I think it is worth taking. The people who get stronger over time are not the ones who never feel sore. They are the ones who feel sore, understand what it means, rest properly, and then go again. If you can do that, the soreness stops being a problem and becomes a familiar part of the process, a sign that you are moving forward, one small step at a time.
Frequently Asked Questions
What does “Why Do Muscles Feel Sore After Exercise” really mean?
It means asking why muscles ache a day or two after exercise, even though they felt fine during the workout. The answer is that new or harder exercise leaves tiny strains in the muscle fibres, and the body’s repair process, which brings extra blood and a small amount of swelling to the area, takes twelve to forty-eight hours to build up. That repair work makes the muscle tender and sore, and the soreness fades as the repair finishes.
Why do so many people search for “Why Do Muscles Feel Sore After Exercise”?
People search for it because it is one of the most common experiences in exercise, and it is confusing. The soreness does not arrive at once, it is often worst the morning after, and it can make simple things like walking down stairs surprisingly painful. People want to know whether it is normal, what causes it, how long it will last, and whether they have injured themselves.
How long does the feeling behind “Why Do Muscles Feel Sore After Exercise” usually last?
Normal muscle soreness usually starts twelve to twenty-four hours after exercise, peaks between twenty-four and forty-eight hours, and fades over two to four days. It should get a little better each day. If it lasts longer than a week, or if it gets worse instead of better, that is not the usual pattern and deserves more attention.
What makes “Why Do Muscles Feel Sore After Exercise” feel stronger on some days?
Soreness is stronger when the exercise is new, when it is harder or longer than usual, when it involves lowering weights slowly or walking downhill, and when you are tired, hungry or short of water. A poor night’s sleep, a long break from exercise, and a sudden jump in effort can all make it worse. Starting gently and increasing the effort gradually is the best way to keep it mild.
Can daily habits change anything about “Why Do Muscles Feel Sore After Exercise”?
Yes. Eating a balanced meal with protein after exercise, drinking enough water through the day, and getting seven to eight hours of sleep all help your muscles recover faster. Gentle movement, like a slow walk, also helps by increasing blood flow to the sore muscles. A proper warm-up before exercise and building up gradually instead of jumping to a hard new routine also make a real difference.
When should I pay closer attention to “Why Do Muscles Feel Sore After Exercise”?
Pay closer attention if the pain is sharp rather than a dull ache, if it is in one small spot, if it gets worse over days instead of better, if there is large swelling, if you cannot move a joint properly, or if you feel very unwell or notice very dark urine after exercise. Also pay attention if you felt a sudden sharp pain during the exercise itself. This article is general information only, not personal advice, and if you are worried, it is sensible to talk to a health professional.
