If you're someone who exercises regularly, when you catch a cold, it feels like your whole day and your whole plan are ruined, right? On the one hand, you feel like you're completely exhausted. On the other hand, you feel sad that the exercise you've been doing for days is about to end. So some people think, "If I exercise a little and sweat, the illness will get better quickly." Others are afraid, "Will exercising make the illness worse?" What's the truth in this story? Today, we'll talk about the relationship between colds and exercise.
Can exercise prevent colds?
Simply put, yes! Regular, moderate exercise is the best way to protect yourself from minor illnesses like the common cold. This doesn't mean you have to "run a marathon." Moderate activity is the key.
Think of it this way: our immune system is like an army that protects a country. It fights off foreign invaders like viruses and bacteria and keeps us from getting sick. When we exercise regularly , our overall fitness improves. This makes our defense force, the immune system, stronger.
Research has shown that simple things like walking briskly for 20-30 minutes every day, going to the gym every other day, or riding bikes with the kids a few days a week can cut the number of colds you get in a year by about half .
How does that happen?
When we exercise, the circulation of white blood cells, a type of fighting cell in our body, increases. These cells are the ones that directly fight infections. Another study found that 65-year-olds who exercised regularly had the same number of T-cells , a type of immune cell, as people in their 30s. This means that exercise helps keep our immune system "younger."
Is it good to exercise when you have a cold?
This is the biggest question many people have. The best answer is that exercise is generally safe as long as you listen to your body . But there are a few things we need to be aware of.
As a general rule, if you only have "above the neck" symptoms (e.g., runny nose , sneezing, a slight itchy throat), there's nothing wrong with doing some light exercise. But if you have "below the neck" symptoms (e.g., chest tightness, cough, body aches, fever), it's definitely best to rest.
Let's explain this further with the table below.
| Type of symptom | Is it possible to exercise? |
|---|---|
| "Above the neck" features - Runny nose - Nasal congestion - Slight sore throat - Sneezing | Yes, but lightly. Reduce the intensity and duration of your usual exercise. For example, walk slowly instead of running. If you lift weights, use lighter weights. |
| "Below the neck" characteristics - Chest tightness, tightness - Severe cough - Body aches, muscle pain - Fever - Extreme fatigue | No, definitely rest. Exercising while you have these symptoms can overwork your body, delay the healing process, and even lead to more serious conditions. |
Let's also be aware of dangerous situations.
1. Cold medicine and exercise: Some decongestant medicines you take for colds will automatically increase your heart rate a little. If you exercise at the same time, your heart may be under too much strain. This can lead to difficulty breathing.
2. Asthma: If you have asthma, be sure to talk to your doctor before exercising when you have a cold. Exercising during this time can increase coughing and wheezing, making it even harder to breathe.
3. Fever: If you have a fever along with a cold, don't even think about exercising. A fever is a sign that your body is fighting an infection. Exercising at this time will only delay your recovery. It's best to wait two to three days for your fever to subside before you start exercising again.
What happens if exercise becomes "too much"?
This is not a problem for most of us. However, there are some people who are so addicted to exercise that they can't even skip a day. But the most important thing to know is that overtraining can actually weaken the immune system.
Scientists say that athletes who continue to train excessively without giving their bodies the rest they need to recover are at greater risk of developing illnesses such as colds and flu.
This is because when we overexert ourselves, the number of white blood cells that fight infection in our bodies can temporarily decrease. At the same time, levels of cortisol, a hormone associated with stress, increase. This can interfere with the functioning of immune cells. Therefore, it is best to exercise "in moderation" for good health.
When should you see a doctor?
If you experience any unusual symptoms during or after exercising while you have a cold, don't ignore it. It's important to take immediate action in the following situations:
| What to do | Features to look out for |
|---|---|
| Call Your Doctor | |
| Stop exercising and consult your family doctor for advice. |
|
| Go to the Emergency Treatment Unit (ETU) immediately. | |
| Stop the activity immediately and go to the nearest hospital emergency room (ETU). These could be signs of a serious condition, such as a heart attack. |
|
Take-Home Message
- Prevention: Regular moderate exercise can help strengthen your immune system and protect you from infections like the common cold.
- Listen to your body: If you have a cold, think about your body before exercising. If your symptoms are above the neck (cold, sneezing), light exercise may be appropriate.
- Rest is essential: If you have "below the neck" symptoms like fever, chest tightness, or body aches, avoid exercise altogether. Give your body the rest it needs to heal.
- Danger signs: If you experience chest pain, shortness of breath, or fainting while exercising, stop immediately and seek emergency medical attention.
- Ask your doctor: If you have other medical conditions, such as asthma, or if you have any concerns, it is safest to consult your doctor before exercising while sick.
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