Can You Workout with a Fever?

It’s generally not a good idea to workout when you’re sick, but sometimes you just can’t help it. So, can you workout with a fever?


The decision of whether you can workout with a fever is a complex one and should depend on the severity of your illness and the advice of your doctor. It is important to understand that if you have a fever, it means that your body is trying to fight off an infection or illness. While exercising may provide some benefits during this time, it may also worsen your influenza-like symptoms if done incorrectly or excessively. Therefore, it is essential to consider all aspects before attempting to do any physical activity while dealing with a fever.

It is also prudent to take certain precautions before engaging in any physical activity while having a fever. Before beginning any strenuous exercise, it is recommended to check your temperature and consult with your doctor if need be. Additionally, you should ensure that you are well hydrated and eating something light beforehand for energy. Remember that if the fever persists more than 24 hours or any other health issues occur such as chest tightness, dizziness or shortness of breath, then immediate medical attention should be sought out.

What is a Fever?

A fever is an elevation in body temperature, and typically considered elevated if it is above 100.4°F (38°C). It is not unusual to feel discomfort and fatigue when a fever has set in. In addition, while a fever can be present due to a number of common illnesses such as the flu or colds, it can also be caused by more serious medical conditions such as infections or other underlying medical issues. It’s important to pay close attention to your health when you experience a fever in order to determine the best course of treatment available for your condition.

In general, you should refrain from any physical activity during such times as your body is likely fighting off whatever virus or bacteria that caused the increase in body temperature and activity could only worsen the situation by taxing already weakened resources. This can put unnecessary strain on your body’s natural healing mechanisms and potentially slow down recovery time. If unsure about what kind of workout is appropriate for you, it’s always best to consult with a physician prior engaging in any physical activity when under the influence of even mild fevers as they may interfere with proper medication plans or react unfavorably with any prescribed medicine (especially if topical).

Causes of Fever

A fever is a sign that your body is trying to fight off an illness or infection. Fevers usually occur when the body fights off a virus or bacteria, but can also be caused by other issues such as allergies, heat exhaustion, autoimmune disorders and more. When you have a fever it’s important to know the cause of it so that you can properly treat it. Common causes of fever include infections such as influenza, strep throat, and ear infections; side effects from medications; and some autoimmune diseases like lupus and rheumatoid arthritis.

It’s important to distinguish between low-grade fevers (99-101 degrees Fahrenheit) and high-grade fevers (greater than 102 degrees Fahrenheit) when considering whether or not to exercise with a fever. Low-grade fevers are usually not concerning unless they are persistent over several days, but high-grade fevers may be a sign of more serious illnesses and warrant medical attention right away. When in doubt, it’s best to consult with your doctor before participating in any physical activity while experiencing a fever.

Symptoms of Fever

It is generally not recommended to exercise with a fever. The symptoms associated with a fever, such as muscle aches and fatigue, can interfere with your workout. Furthermore, the extra strain of exercise can increase the severity of your symptoms and make you more vulnerable to the complications of infection.

In general, any temperature over 100°F (37.8°C) is considered a fever. Additional common symptoms of fever include headache, chills and sweating, body aches, sore throat, loss of appetite and/or abdominal pain. Many people also experience extreme exhaustion when they suffer from a fever. These additional symptoms can make it difficult to focus on getting in a workout while you’re sick.

It’s important to remember that you don’t need to be in perfect health to achieve your fitness goals; however, exercising while you have a fever could be dangerous for your health if the infection hasn’t been correctly identified or treated yet by a medical professional. If you think you may have a fever or other signs of an infection – seek out medical advice before hitting the gym!

Risks of Working Out with a Fever

If you have a fever, it is important to know that exercising during this time might put you at risk of further health complications. Working out with a fever increases the risk of exercise-induced hyperthermia and dehydration, and can cause your body temperature to rise even higher while complicating hydration efforts. It can also potentially weaken your immune system by increasing stress hormones such as cortisol or epinephrine, leaving you vulnerable to longer-term health issues.

Exercise increases your body temperature, which may also cause your fever to increase. This can be dangerous if you are already running a high temperature. Additionally, engaging in physical activity when your body is fighting off an illness can put extra stress on your body and can impede the healing process. In some cases, exercising with a fever has been linked with prolonged recovery times for those battling serious illnesses like pneumonia or bronchitis.

If you are feeling unwell and have any symptoms of infection or illness including those related to COVID-19 it is important that you consult a healthcare professional before engaging in physical activity--even if it is just light exercise like walking. If your doctor recommends that you stay physically active during an illness, they will provide instructions on how frequently and intensely to exercise while taking into account the severity of your symptoms so as not to exacerbate them or place yourself at further risk of complications.

When to Work Out with a Fever

Fevers can be a symptom of a wide range of illnesses, from the common cold to more serious infections like the flu. While it’s important to rest when you have a fever, in some cases it can be helpful to incorporate low-intensity exercise. When deciding whether or not to exercise with a fever, it’s essential to consider the severity of your symptoms.

If your fever is below 102˚F (38.8˚C) and you have mild symptoms such as headache, sore throat, and/or body aches/aches, moderate physical activity may help reduce fatigue, improve sleep quality, and boost mood. Be sure to factor in breaks as needed and drink plenty of fluids. It is advised that any activity that produces profuse sweating should be avoided until your fever has been gone for at least 24 hours.

On the other hand, if your fever is over 102˚F (38.8˚C) or if your symptoms are severe (e.g., chest congestion, difficulty breathing), it’s best to avoid all physical activity for at least 24 hours after the fever has ended or until all other symptoms have abated – whichever takes longer. If there is any sign of exertional chest pain or extreme fatigue with physical activity then you should stop immediately and get medical attention if needed as these could indicate serious illnesses such as pneumonia or a heart-related issue that could make exercising unsafe even with milder fevers and symptoms. It is essential to consult your doctor before resuming exercise in this situation as they will be able to provide you with tailored advice on when it would be safest for you to return back into action safely according to your specific needs/health status/concerns etcetera..

Tips for Working Out with a Fever

If you have a fever and you want to consider working out, it’s important to first consult your doctor. If you have a fever, this means that your body is fighting an infection or virus and working out may not be the best choice.

If you are determined to exercise with a fever, there are some steps you can take to reduce the risk of making it worse. Make sure to hydrate and get plenty of rest before engaging in physical activity. Drink plenty of fluids, such as sports drinks and regular water, so that your body does not become dehydrated before starting the workout. In addition, listen for cues from your body about whether or not it is ready for physical activity; if feeling very weak or dizzy after standing up then you should wait until these symptoms decrease before continuing with exercising.

It is also wise to avoid strenuous activities while having a fever; these activities can be taxing on the body’s energy reserves which are already weakened due to the fever. You should instead focus on gentle activities like yoga or walking that put less strain on your body while still providing benefit. And be sure to stay within safe temperature limits; if the temperature increases above 101 degrees Fahrenheit (38 degrees Celsius) while exercising stop immediately and rest until recovered.

When choosing whether or not to exercise when having a fever it is important to consider both personal comfort level as well as recommendations from medical professionals who can provide personalized advice catered specifically for one’s situation. Be mindful of any risks involved so that workouts do not worsen overall health but rather improve it!


In conclusion, it is generally not safe to exercise when you have a fever. If you have a fever of 100.4°F or above and/or if your symptoms are severe, you should rest and visit your doctor for evaluation. It important to wait until the fever subsides before resuming any physical activity. Your doctor may also recommend delaying your workout for several days or more in order to prevent further illness or injury. If the fever is mild and short lived, then light exercise such as walking may be allowed, but it’s crucial to make sure your body has enough energy to recover from the illness before pushing it too hard with physical activity.

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