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You know exercise builds muscles, strengthens bones, keeps your heart healthy and your mind sharp. But it also does something that you might not think much about: It helps keep your immune system โ your internal defenses against infection โ in tip-top shape.
If you take time for some physical exertion each day, it helps get your body ready to attack bacteria, viruses and toxins that can sneak in and make you sick.
But how much exercise is effective? Do too little or too much, and it wonโt have the best effect on your immune system.
Clinical immunologist Leonard Calabrese, DO, answers common questions about how exercise can impact your immunity and how to use your workouts to shut out a world of would-be invaders.
A: If you exercise moderately on a regular basis, it tunes up the immune system in many ways. It enhances your broad-based defenses against viral infections, such as those causing upper respiratory infections.
Working out regularly also reduces the risk of many chronic diseases such as cardiovascular, respiratory illnesses and metabolic diseases, such as type 2 diabetes.
A: Fortunately, you donโt have to push yourself to the limit to rev up your immune system. In fact, your immune system needs less of a workout than you get with your average cardio routine.
Focus on getting 20-30 minutes of moderate exercise, five days a week, and your immune system will thank you.
A: Moderate exercises, including biking or walking briskly in your neighborhood, are good ways to get your blood flowing. Swimming is also a good option for non-weight-bearing exercise for your joints.
Also try mind-body exercises such as Tai-Chi, Qi Gong and yoga, which are all options that help keep your joints flexible. These exercises also reduce chronic stress, which in itself is a powerful immune booster. These exercises can also help alleviate osteoarthritis and fibromyalgia symptoms.
A: Yes, though, the level to which it can slow your system down is still up for debate.
Research shows that exercising for more than 1.5 hours without refueling your body or giving it enough time to recover suppresses your immune responses for up to a few days. During that time, your cortisol levels rise, your white blood cell count drops and youโre more likely to develop a respiratory infection.
This problem usually affects elite athletes, such as marathon runners, most.
On the flip side, staying sedentary also increases your risk of infection, inflammation and chronic disease.
A: Yes, it can. This is a complex issue, but I like to tell my patients to do a โneck check.โ If your symptoms are mostly of a mild cold without fever or lower respiratory symptoms, such as a productive cough, wheezing or shortness of breath, mild exercise can actually reduce congestion and may make you feel better.
If your symptoms are primarily in your lungs or you have a significant fever its better to rest until things settle down. Regardless, good hydration is important.

We all want to protect our kids whether it be from falls, bumps and bruises โ or avoidable infections and diseases. To help your child avoid illness, itโs important to encourage good habits and take steps to boost their immune system from an early age.
โMost of what makes a childโs immune system strong is common sense,โ says pediatrician Adriane Lioudis, MD. If you keep these five tips in mind, youโll stack the deck in your childโs favor for a healthier life.
While itโs a very personal decision (that isnโt always possible), if you are able to exclusively breastfeed your child for at least six months, it may have benefits. Some research shows that breastfeeding your child might possibly reduce allergies, Dr. Lioudis says.
Eighty percent of infections are spread by touch. Teach your little one to take the time to wash their hands after sneezing, coughing and going to the bathroom. Washing hands with warm water and soap for at least 20 seconds can remove bacteria and viruses and can reduce the chance of lung infections by up to 45%.
Follow your pediatricianโs advice when it comes to the childhood vaccination schedule. Immunizations start in infancy and continue to adulthood and prevent measles, mumps, chickenpox, rotavirus and other infections.
โGet the flu shot for your child yearly, as well,โ Dr. Lioudis says. This is particularly important for children with asthma and other chronic health conditions.
Also, if your family will be traveling internationally, itโs important to seek advice from your childโs healthcare provider about any needed vaccinations.
To maximize immunity, children must get enough sleep.
Sleep requirements for each night vary by age:
Not getting enough sleep limits the bodyโs ability to produce proteins called cytokines that help fight infection and reduce inflammation.
A healthy diet is also important for your childโs immune system.
Dr. Lioudis recommends encouraging your child to โeat the rainbowโ when it comes to fruits and vegetables. A good selection of whole grains should be part of their diet as well. Keep processed foods to a minimum. Proper food choices can help ensure that your child gets enough vitamins โ such as vitamin A and E. These vitamins are needed to maintain good health and a strong immune system.
โEven if you follow these tips, your child might still get between seven and 11 colds each year,โ says Dr. Lioudis. She adds that you can expect each one to last up to two weeks.
Also, keep in mind that some things billed as common โremediesโ arenโt effective in boosting immunity. For example, thereโs no definitive proof that large amounts of vitamin C or echinacea help prevent colds or shorten them, she says.
However, if your child has a compromised immune system, work closely with your pediatrician to find ways to improve his or her immunity. Each child needs a personalized approach because their individual immune system varies, Dr. Lioudis says.
โThereโs generally a different protocol with immunocompromised children. There are some vaccines we have to add in on top of what most children have, but itโs something that we must determine on a case-by-case basis.
You know exercise builds muscles, strengthens bones, keeps your heart healthy and your mind sharp. But it also does something that you might not think much about: It helps keep your immune system โ your internal defenses against infection โ in tip-top shape.
If you take time for some physical exertion each day, it helps get your body ready to attack bacteria, viruses and toxins that can sneak in and make you sick.
But how much exercise is effective? Do too little or too much, and it wonโt have the best effect on yourย immune system.
Clinical immunologist ย Leonard Calabrese, DO, answers common questions about how exercise can impact your immunity and how to use your workouts to shut out a world of would-be invaders.
A:ย If you exercise moderately on a regular basis, it tunes up the immune system in many ways. It enhances your broad-based defenses against viral infections, such as those causing upper respiratory infections.
Working out regularly also reduces the risk of many chronic diseases such as cardiovascular, respiratory illnesses and metabolic diseases, such as type 2 diabetes.
A:ย Fortunately, you donโt have to push yourself to the limit to rev up your immune system. In fact, your immune system needs less of a workout than you get with your average cardio routine.
Focus on getting 20-30 minutes of moderate exercise, five days a week, and yourย immune systemย will thank you.
A:ย Moderate exercises, including biking or walking briskly in your neighborhood, are good ways to get your blood flowing. Swimming is also a good option for non-weight-bearing exercise for your joints.
Also try mind-body exercises such as Tai-Chi, Qi Gong and yoga, which are all options that help keep your joints flexible. These exercises also reduce chronic stress, which in itself is a powerful immune booster. These exercises can also help alleviate osteoarthritis andย fibromyalgiaย symptoms.
A:ย Yes, though, the level to which it can slow your system down is still up for debate.
Researchย shows that exercising for more than 1.5 hours without refueling your body or giving it enough time to recover suppresses your immune responses for up to a few days. During that time, your cortisol levels rise, your white blood cell count drops and youโre more likely to develop a respiratory infection.
This problem usually affects elite athletes, such asย marathonย runners, most.
On the flip side, staying sedentary also increases your risk of infection, inflammation and chronic disease.
A:ย Yes, it can. This is a complex issue, but I like to tell my patients to do a โneck check.โ If your symptoms are mostly of a mild cold without fever or lower respiratory symptoms, such as a productive cough, wheezing or shortness of breath, mild exercise can actually reduce congestion and may make you feel better.
If your symptoms are primarily in your lungs or you have a significant fever its better to rest until things settle down. Regardless, good hydration is important.


You know exercise builds muscles, strengthens bones, keeps your heart healthy and your mind sharp. But it also does something that you might not think much about: It helps keep your immune system โ your internal defenses against infection โ in tip-top shape.
If you take time for some physical exertion each day, it helps get your body ready to attack bacteria, viruses and toxins that can sneak in and make you sick.
But how much exercise is effective? Do too little or too much, and it wonโt have the best effect on your immune system.
Clinical immunologist Leonard Calabrese, DO, answers common questions about how exercise can impact your immunity and how to use your workouts to shut out a world of would-be invaders.
A: If you exercise moderately on a regular basis, it tunes up the immune system in many ways. It enhances your broad-based defenses against viral infections, such as those causing upper respiratory infections.
Working out regularly also reduces the risk of many chronic diseases such as cardiovascular, respiratory illnesses and metabolic diseases, such as type 2 diabetes.
A: Fortunately, you donโt have to push yourself to the limit to rev up your immune system. In fact, your immune system needs less of a workout than you get with your average cardio routine.
Focus on getting 20-30 minutes of moderate exercise, five days a week, and your immune system will thank you.
A: Moderate exercises, including biking or walking briskly in your neighborhood, are good ways to get your blood flowing. Swimming is also a good option for non-weight-bearing exercise for your joints.
Also try mind-body exercises such as Tai-Chi, Qi Gong and yoga, which are all options that help keep your joints flexible. These exercises also reduce chronic stress, which in itself is a powerful immune booster. These exercises can also help alleviate osteoarthritis and fibromyalgia symptoms.
A: Yes, though, the level to which it can slow your system down is still up for debate.
Research shows that exercising for more than 1.5 hours without refueling your body or giving it enough time to recover suppresses your immune responses for up to a few days. During that time, your cortisol levels rise, your white blood cell count drops and youโre more likely to develop a respiratory infection.
This problem usually affects elite athletes, such as marathon runners, most.
On the flip side, staying sedentary also increases your risk of infection, inflammation and chronic disease.
A: Yes, it can. This is a complex issue, but I like to tell my patients to do a โneck check.โ If your symptoms are mostly of a mild cold without fever or lower respiratory symptoms, such as a productive cough, wheezing or shortness of breath, mild exercise can actually reduce congestion and may make you feel better.
If your symptoms are primarily in your lungs or you have a significant fever its better to rest until things settle down. Regardless, good hydration is important.

February 15, 2024
Alcohol affects your whole body, from your liver and immune system to your brain and mental health
You probably already know that excessive drinking can affect you in more ways than one.
There are the empty calories that can lead to weight gain. Thereโs the potential for injury and regrettable choices. And donโt forget about the hangovers of course.
Heavy drinking can also lead to a host of health concerns, like brain damage, heart disease, cirrhosis of the liver and even certain kinds of cancer.
And thatโs on top of the toll that alcohol use can take on relationships, not to mention the potential for financial strain and legal troubles.
But even moderate alcohol use changes the way your body functions.
We talked with hepatologist Shreya Sengupta, MD, about how alcohol use affects your body and your emotional health.
โSome people think of the effects of alcohol as only something to be worried about if youโre living with alcohol use disorder, which was formerly called alcoholism,โ Dr. Sengupta says.
โBut when you consider how alcohol is metabolized and used by your body, we can start to see that even moderate and social drinking affects our health to some degree.โ
Dr. Sengupta shares some of the not-so-obvious effects that alcohol has on your body.
Your liver detoxifies and removes alcohol from your blood through a process known as oxidation. When your liver finishes that process, alcohol gets turned into water and carbon dioxide.
But when you ingest too much alcohol for your liver to process in a timely manner, a buildup of toxic substances begins to take a toll on your liver.
If alcohol continues to accumulate in your system, it can destroy cells and, eventually, damage your organs.
โWhen your liver is overwhelmed by oxidizing alcohol, it generates molecules that inhibit fat oxidation,โ Dr. Sengupta explains. โThe fats build up. Over time, it can lead to a condition known as steatotic liver disease.โ
Steatotic liver disease used to go by the name fatty liver disease.
Steatotic liver disease develops in about 90% of people who drink more than 1.5 to 2 ounces of alcohol per day. Thatโs about one shot glass worth.
With continued alcohol use, steatotic liver disease can lead to liver fibrosis. Eventually, you can develop permanent and irreversible scarring in your liver, which is called cirrhosis.
โThe good news is that earlier stages of steatotic liver disease are usually completely reversible in about four to six weeks if you abstain from drinking alcohol,โ Dr. Sengupta assures.
Cirrhosis, on the other hand, is irreversible and can lead to liver failure and liver cancer, even if you abstain from alcohol.
You probably are keenly aware of the so-called โbeer belly.โ Thatโs shorthand for a round midsection that some people associate with drinking too much beer.
In reality, thereโs no evidence that drinking beer (or your alcoholic beverages of choice) actually contributes to belly fat.
But thereโs plenty of research to back up the notion that alcohol does lead to weight gain in general. Even for people who arenโt particularly heavy drinkers.
โDrinking gives your body work to do that keeps it from going about its other processes,โ Dr. Sengupta notes. โAlcohol distracts your system from its regularly scheduled duties, including things like metabolizing carbohydrates and fats.โ
Once you take a drink, your body makes metabolizing alcohol a priority โ above processing anything else.
Thatโs because your body already has processes in place that allow it to store excess proteins, carbohydrates and fats. But there isnโt a storage tank for alcohol. So, your system prioritizes getting rid of alcohol before it can turn its attention to its other work.
That allows excess calories from the foods you eat to sit around, leading to weight gain.
Your gut microbiome is a hotbed of bacteria that help keep your digestive system happy and healthy. The trillions of microbes in your colon and large and small intestines are critical to proper digestion. They also help fend off inflammation and support healthy metabolism.
When you drink too much alcohol, it can throw off the balance of good and bad bacteria in your gut.
โAlcohol can kill the good bacteria that live in your gut, allowing bad bacteria to grow unchecked,โ Dr. Sengupta explains. โThat can lead to problems with digestion, inflammation and even organ damage.โ
Having a glass of wine with dinner or a beer at a party here and there isnโt going to destroy your gut. But even low amounts of daily drinking and prolonged and heavy use of alcohol can lead to significant problems for your digestive system.
Too much alcohol is bad for your heart. Alcohol can cause:
Warnings from the World Heart Federation go so far as to state that no amount of alcohol is safe for your ticker.
But wait, you may be thinking, what about those headlines that claim red wine is supposed to be good for my heart?
There are a few studies that associate red wine with improved heart health in lab tests. But no research proves that red wine causes any improvements in heart health in people.
โThe reality is that alcohol causes more health troubles than it could ever help,โ Dr. Sengupta reinforces. โAnd that goes for your heart, as well as the rest of your body.โ
Your pancreas helps your body digest food and manage your blood sugar. Drinking alcohol changes how your pancreas works.
โYour pancreas secretes fluids. Alcohol use can thicken those fluids, which can clog the ducts that those fluids flow out of,โ Dr. Sengupta explains.
Like a clog in a drain, those thickened fluids can jam up your ducts. That can lead to pancreatitis, which is inflammation of the pancreas.
Pancreatitis can be a short-term (acute) condition that clears up in a few days. But prolonged alcohol abuse can lead to chronic (long-term) pancreatitis, which can be severe.
The U.S. Centers for Disease Control and Prevention (CDC) has a clear warning regarding the connection between drinking and cancer: โThe less alcohol you drink, the lower your risk for cancer.โ
Why?
Your body breaks alcohol down into a chemical called acetaldehyde, which damages your DNA. Damaged DNA can cause a cell to grow out of control, which results in cancerous tumors.
Alcohol use has been shown to raise your risk for several kinds of cancer. That includes cancers of the:
If you drink every day, or almost every day, you might notice that you catch colds, flu or other illnesses more frequently than people who donโt drink. Thatโs because alcohol can weaken your immune system and make your body more susceptible to infection.
โWe see lower levels of a specific kind of white blood cells called lymphocytes in people who drink heavily for long periods of time,โ Dr. Sengupta reports. โThat can leave them more vulnerable to infectious diseases.โ
The morning after a night of over-imbibing can cause some temporary effects on your brain. Things like trouble concentration, slow reflexes and sensitivity to bright lights and loud sounds are standard signs of a hangover, and evidence of alcoholโs effects on your brain.
Long-term alcohol use can change your brainโs wiring in much more significant ways. Ways that your standard hangover cures wonโt even begin to touch.
โExcessive alcohol consumption can cause nerve damage and irreversible forms of dementia,โ Dr. Sengupta warns.
Alcohol is a depressant. And prolonged alcohol use can lead to mental health conditions like anxiety and depression. Chronic misuse can also lead to paranoia and hallucinations.
Even drinking a little too much (binge drinking) on occasion can set off a chain reaction that affects your well-being. Lowered inhibitions can lead to poor choices with lasting repercussions โ like the end of a relationship, an accident or legal woes. Each of those consequences can cause turmoil that can negatively affect your long-term emotional health.
โAlcohol tends to cause more problems than it solves for a lot of people,โ Dr. Sengupta emphasizes. โIf drinking is affecting your health, your relationships, your work, your finances, itโs time to make some serious changes.โ
Ready to stop drinking and improve your health? These tips may help.
If you need more guidance to quit drinking, the Substance Abuse and Mental Health Services Administration (SAMHSA) offers a hotline, 24/7, 365 days a year. Call 1.800.662.HELP (4357).
Alcoholics Anonymous is available almost everywhere and provides a place to openly and nonjudgmentally discuss alcohol issues with others who have alcohol use disorder.
You know exercise builds muscles, strengthens bones, keeps your heart healthy and your mind sharp. But it also does something that you might not think much about: It helps keep your immune system โ your internal defenses against infection โ in tip-top shape.
If you take time for some physical exertion each day, it helps get your body ready to attack bacteria, viruses and toxins that can sneak in and make you sick.
But how much exercise is effective? Do too little or too much, and it wonโt have the best effect on yourย immune system.
Clinical immunologist ย Leonard Calabrese, DO, answers common questions about how exercise can impact your immunity and how to use your workouts to shut out a world of would-be invaders.
A:ย If you exercise moderately on a regular basis, it tunes up the immune system in many ways. It enhances your broad-based defenses against viral infections, such as those causing upper respiratory infections.
Working out regularly also reduces the risk of many chronic diseases such as cardiovascular, respiratory illnesses and metabolic diseases, such as type 2 diabetes.
A:ย Fortunately, you donโt have to push yourself to the limit to rev up your immune system. In fact, your immune system needs less of a workout than you get with your average cardio routine.
Focus on getting 20-30 minutes of moderate exercise, five days a week, and yourย immune systemย will thank you.
A:ย Moderate exercises, including biking or walking briskly in your neighborhood, are good ways to get your blood flowing. Swimming is also a good option for non-weight-bearing exercise for your joints.
Also try mind-body exercises such as Tai-Chi, Qi Gong and yoga, which are all options that help keep your joints flexible. These exercises also reduce chronic stress, which in itself is a powerful immune booster. These exercises can also help alleviate osteoarthritis andย fibromyalgiaย symptoms.
A:ย Yes, though, the level to which it can slow your system down is still up for debate.
Researchย shows that exercising for more than 1.5 hours without refueling your body or giving it enough time to recover suppresses your immune responses for up to a few days. During that time, your cortisol levels rise, your white blood cell count drops and youโre more likely to develop a respiratory infection.
This problem usually affects elite athletes, such asย marathonย runners, most.
On the flip side, staying sedentary also increases your risk of infection, inflammation and chronic disease.
A:ย Yes, it can. This is a complex issue, but I like to tell my patients to do a โneck check.โ If your symptoms are mostly of a mild cold without fever or lower respiratory symptoms, such as a productive cough, wheezing or shortness of breath, mild exercise can actually reduce congestion and may make you feel better.
If your symptoms are primarily in your lungs or you have a significant fever its better to rest until things settle down. Regardless, good hydration is important.

We all want to protect our kids whether it be from falls, bumps and bruises โ or avoidable infections and diseases. To help your child avoid illness, itโs important to encourage good habits and take steps to boost their immune system from an early age.
โMost of what makes a childโs immune system strong is common sense,โ says pediatrician Adriane Lioudis, MD. If you keep these five tips in mind, youโll stack the deck in your childโs favor for a healthier life.
While itโs a very personal decision (that isnโt always possible), if you are able to exclusively breastfeed your child for at least six months, it may have benefits. Some research shows that breastfeeding your child might possibly reduce allergies, Dr. Lioudis says.
Eighty percent of infections are spread by touch. Teach your little one to take the time to wash their hands after sneezing, coughing and going to the bathroom. Washing hands with warm water and soap for at least 20 seconds can remove bacteria and viruses and can reduce the chance of lung infections by up to 45%.
Follow your pediatricianโs advice when it comes to the childhood vaccination schedule. Immunizations start in infancy and continue to adulthood and prevent measles, mumps, chickenpox, rotavirus and other infections.
โGet the flu shot for your child yearly, as well,โ Dr. Lioudis says. This is particularly important for children with asthma and other chronic health conditions.
Also, if your family will be traveling internationally, itโs important to seek advice from your childโs healthcare provider about any needed vaccinations.
To maximize immunity, children must get enough sleep.
Sleep requirements for each night vary by age:
Not getting enough sleep limits the bodyโs ability to produce proteins called cytokines that help fight infection and reduce inflammation.
A healthy diet is also important for your childโs immune system.
Dr. Lioudis recommends encouraging your child to โeat the rainbowโ when it comes to fruits and vegetables. A good selection of whole grains should be part of their diet as well. Keep processed foods to a minimum. Proper food choices can help ensure that your child gets enough vitamins โ such as vitamin A and E. These vitamins are needed to maintain good health and a strong immune system.
โEven if you follow these tips, your child might still get between seven and 11 colds each year,โ says Dr. Lioudis. She adds that you can expect each one to last up to two weeks.
Also, keep in mind that some things billed as common โremediesโ arenโt effective in boosting immunity. For example, thereโs no definitive proof that large amounts of vitamin C or echinacea help prevent colds or shorten them, she says.
However, if your child has a compromised immune system, work closely with your pediatrician to find ways to improve his or her immunity. Each child needs a personalized approach because their individual immune system varies, Dr. Lioudis says.
โThereโs generally a different protocol with immunocompromised children. There are some vaccines we have to add in on top of what most children have, but itโs something that we must determine on a case-by-case basis.