How Exercise Makes Your Brain Bigger, Better, and Stronger

Mladenoff Clinic Team • July 22, 2018

New research is nailing down the idea that putting regular physical activity into your daily routine may just be one of the best things you can do to keep your brain healthy.

Doctors long have recommended that you get off your couch and exercise if you want to reduce the risk of common physical troubles, such as poor balance or back pain. Now, though, experts are gathering new data on how working out affects your brain, and it turns out that heading to the gym or popping in a fitness video holds significant promise for a building and maintaining a better-functioning noodle.

Hormones and genetics.

Exercise has a big influence on hormonal production within the body. It boosts the creation of substances such as serotonin, dopamine and norepinephrine, for example. These chemicals can improve your mood, and they positively affect areas like perception, arousal, motivation and attention. At the same time, exercise reduces levels of other hormones, such as cortisol. This hormone can damage cells in the hippocampus, one of the areas of the brain researchers associate primarily with memory and learning, so keeping it under control can have a protective result on your cognitive performance.

Hormones also signal your body to create more of a specific protein known as brain-derived neurotrophic factor (BDNF). This protein helps neurons in the brain grow--in fact, scientists have dubbed it "Miracle-Gro for the brain." It also makes the synapses that connect those neurons stronger. Researchers believe this might be in part because ketones, which you produce during exercise as a byproduct of breaking down fat, prevent specific molecules from blocking the activity of the gene associated with BDNF. More specifically, BDNF production seems best with more intense aerobic exercise, particularly in sessions lasting an hour or more. Strength training and similar activities might be beneficial, too, as experts have proved they can boost the speed at which you process information, but the key to BDNF and brain building appears to be ensuring the exercises you choose are hard enough to include a cardiovascular component--that is, they need to elevate your heart rate.

Oxygen, glucose, and insulin.

Getting your sweat on translates to increased blood flow to the brain. Subsequently, brain cells have better access to the oxygen and energy-providing glucose (sugar) they need. Nevertheless, your cells still need a substance called insulin to absorb glucose for fuel. If you become resistant to insulin, which can happen because of habitual overconsumption of sugary foods, your cells no longer can get sufficient amounts of energy, and blood sugar levels can skyrocket. Insulin also plays a part in keeping the connections between brain cells strong. Thus, insulin resistance can mean you can't process or remember information as well. Exercise, however, reduces insulin resistance: If you exercise long and hard enough, you use up the glucose stored in your muscles. The body reacts by making the muscles respond better to insulin so they can take glucose out of the bloodstream and replenish their energy stores.


No wrong way to get in the game.

Exercise influences multiple processes in your body, including hormone production, insulin response, and oxygen uptake. The changes it initiates not only protect your gray matter, but can make your brain bigger and stronger, too. If you're looking to prevent cognitive decline and outperform your competition, go for a run, hit the pool, play physical games with your kids, or try a scientifically proven seven-minute workout.

Whatever you enjoy, just move! Your brain will thank you.

Read the full article here. Source: Inn.com
Schedule an appointment today! Call or text Dr. Diana at (602) 524-0222. Or Email us at info@mladenoffclinicaz.com

August 9, 2026
As loving and caring parents, we naturally want to help our children feel better when the inevitable fevers, colds, and illnesses arise. Many of us will reach for popular over-the-counter remedies to suppress fever and alleviate symptoms, in the belief that these products are reliable. Yet, it is important to recognize that by suppressing fever, we are suppressing a critical immune response—one that has a necessary function in fighting illness. I can attest to the enormous fear that fever provokes in parents. By far, the greatest number of after-hours telephone calls are questions regarding the “management” of fever with drugs. Undue attention to a child’s temperature and mishandling of fevers generate a great deal of unwarranted parental anxiety, avoidable medical complications, and countless calls and costly visits to doctors and emergency rooms. As long as we remain captive to the medical myth that nature made a mistake in causing a fever during illness, our children will be put at risk. Yes, fever can be uncomfortable. A child with a high fever will often seem irritable, lethargic, glassy eyed, and listless. This alerts you that the body is mobilizing defense against disease and you, in turn, must care for your child in the most appropriate way: encouraging rest and fluids. On the other hand, there may be no reason to treat even a high fever if your child seems happy, active and alert. The pervasive belief that fever is dangerous and must be suppressed disregards the scientific evidence demonstrating its beneficial role in inflammatory diseases. The immune system depends on the fever to accomplish myriad tasks when gearing up to fight infections. “Fever phobia” is made worse by hearing myths about children being severely harmed by having a high fever. Many people know of children or adults who had a high fever and ended up with some sort of injury…brain damage or hearing loss. These problems are never caused by fever. The likely explanation is that they had a serious illness that gave them a fever, but it was the illness that caused the brain damage or other result. The fever was only the body’s attempt to fight the infection. “Doctors do a great disservice to you and your child when they prescribe drugs to reduce fever,” writes Dr. Robert Mendelsohn, pediatrician and author of How to Raise a Healthy Child In Spite of Your Doctor. “Fever phobia is a disease of pediatricians, not parents, and to the extent that parents are victimized by it, doctors are at fault.” Parents are left to fear that their child’s temperature will keep rising unless measures are taken to control it. Yet, reducing the child’s temperature will do nothing to make the child well, and our bodies have a built-in mechanism that will prevent an infection-induced temperature from reaching dangerous levels. Mendelsohn emphasizes that “only in the case of heatstroke, poisoning, or other externally caused fevers is this body mechanism overwhelmed and inoperative.” “Fever: Your Body’s Defense Against Disease” is the title of Chapter 7 in Dr. Mendelsohn’s book, an excellent resource for parents seeking a balanced and accurate perspective of the beneficial role of fevers in childhood. Dr. Mendelsohn condemns the useless and dangerous practice of fever suppression through drugs, and counters the myth that high fever causes seizures. “Many parents are fearful of fevers because they have witnessed a convulsive seizure and believe their child may experience one if the body temperature is allowed to rise too high. High fevers do not cause convulsions. They result when the temperature rises at an extremely rapid rate and are relatively uncommon.” Only a small percentage of children with high fever experience convulsions, and those who do suffer them do not have any aftereffects. Simple febrile seizures are self-limited and harmless, although they are one of the most frightening things that a parent can witness. Dr. Mendelsohn continues, “Fevers produced by viral or bacterial infections will not cause brain damage or permanent physical harm. Fevers are a common symptom in children and are not an indication of serious illness unless associated with major changes in appearance and behavior or other additional symptoms such as respiratory difficulty, extreme listlessness, or loss of consciousness. The height of fever is not a measure of the severity of the illness.” A child who appears very ill with a fever of 101°F would be much more of a concern to me than a child who feels fine, is drinking and playing, but has a fever of 105°F. Numerous studies have shown that fever enhances the immune response by disabling bacteria and viruses. Also, with a rise in temperature, iron is removed from the blood and stored in the liver, further disabling the rate at which bacteria can multiply. As a note of caution, when a fever arises in a newborn in the first few weeks after birth, there is a heightened level of concern. “Newborn babies may suffer infections related to obstetrical interventions during delivery, …aspiration pneumonia from amniotic fluid forced into the lungs because of overmedication of the mother during delivery…and exposure to the legion of germs that abound in the hospital itself,” writes Dr. Mendelsohn. Parents are advised to seek medical help if a baby runs a fever in the first two months after birth. As breastfeeding plays a critical role in preventing infections in infants, breastfed babies are superbly protected against a vast range of pathogens and have a lesser risk of developing fevers in the newborn phase. Mistrust of natural processes and reliance on drug-oriented medicine has obscured parents’ understanding of the importance of childhood illnesses and the necessity of fever as a vital aspect of the immune system. When a child has a fever, it is not necessary to artificially lower the temperature. It is, however, important for the child to take in plenty of fluids, because in this time of elevated body temperature, it is easy to become dehydrated. Broth, liquid electrolytes, and fruit juices are great choices because they replace electrolytes that are used up in the fever process. Rest during times of fever will allow the body to use its energy to fight off infection. Make a commitment to spend time with your sick child. Any time that you feel concerned about the way your child is acting, or if your instinct is that something is wrong, do not hesitate to call your doctor. Schedule an appointment with Dr. D by calling or texting our Arizona Wellness Clinic at 1 (602) 524-0222. Source: Susan Markel, MD, via Pathways linked here.
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