Exercícios: Benefícios Surpreendentes para Corpo e Mente que Todos Deveriam Conhecer

This is Joan McDonald in 2016, 70 years old: obese, facing constant pain, low energy levels, arthritis, a fragile, tired body and difficulty going up and down stairs. A dedicated mother and grandmother, Joan, like many people in their 70s, lived a constant battle, and her dreams seemed to crumble with each new diagnosis. John was taking medication for high blood pressure, cholesterol and acid reflux.

Doctors told her she would need to increase her dosages unless she made a drastic lifestyle change. Tired of all that, she said: 'It's now or never'. Her daughter Michelle, her biggest supporter, made a proposal: 'Mom, let's change this together.

I believe in you. You don't have to grow old like everyone else'. John hesitated and was afraid of failing, but his daughter's love and desire to live fully spoke louder.

At age 70, with steely determination and help from her daughter, Joan joined a gym for the first time in her life. The first few days were painful; every move seemed impossible, but Joan persisted. With guidance, she began lifting weights, sweating, fighting her own limits.

What began as a desperate attempt to gain health turned into an epic journey of self-discovery and overcoming. Months passed and the transformation was incredible. Joan not only lost weight and gained muscle; she found a new version of herself, a strong and vibrant woman.

Fragility gave way to strength and hopelessness turned into determination. His doctor was impressed and was able to take him off almost all of his medications. Today, in 2024, at 78 years old, Joan McDonald is an icon of overcoming, an inspiration to thousands of people around the world.

In a recent post on her Instagram, she said: 'Who would have thought that at 78 I would be a fitness model? Certainly not me. ' Joan McDonald's story is a powerful example of how physical exercise can change our lives, but the benefits go far beyond what the eyes can see.

Joan not only lost weight, sculpted her body with muscle, and drastically decreased the number of medications she took; it improved your disposition, your general health, your mood, your ability to focus and learn. Joan discovered benefits that few people associate with physical exercise. For example, exercise is a natural antidepressant because it releases endorphins, chemicals in the brain that improve mood.

Few people know that exercise is an excellent way to manage stress, reducing symptoms of anxiety and promoting an overall sense of well-being. Additionally, although exercise causes temporary inflammation at first, regular exercise reduces chronic inflammation in the body, relieving persistent pain and, in some cases, being more effective than anti-inflammatory medications. Exercise, by producing endorphins, works as a natural painkiller, reducing headaches or other pain.

Exercise increases blood flow to the brain, nourishing nerve cells and stimulating neuroplasticity, creating new neural connections. This helps prevent neurodegenerative diseases such as Alzheimer's and Parkinson's. The benefits don't stop here.

Regular exercise reduces the risk of heart disease and type 2 diabetes, improves insulin sensitivity, helping to manage blood glucose levels, and has an anti-aging effect by protecting against the loss of muscle and bone mass. That's right, exercise helps increase bone density, making your bones stronger. For older adults, strength exercise is especially crucial for bone health.

During physical activity, mechanical stress on bones signals the body to increase absorption of minerals like calcium and promote bone remodeling. This not only prevents loss of bone density, but also strengthens bones, reducing the risk of fractures and osteoporosis. Physical exercise also improves the health of the intestinal microbiota by increasing blood flow to intestinal cells.

This increase in oxygen and nutrients stimulates the production of beneficial substances that are essential for digestion and the general health of the body. Additionally, exercise promotes deeper, more restful sleep, and quality sleep regulates the entire body, helping with muscle recovery, hormonal balance and strengthening the immune system. This is physical exercise: the true elixir of life, free and available to all of us.

Many people say that, if there were a capsule capable of providing all these benefits, it would certainly be the best-selling in the world. And how did physical exercise help Joan McDonald reduce her dependence on medication? One of Joan's problems was high blood pressure.

Let's understand what happened. Physical exercise has a direct effect on reducing blood pressure. During exercise, blood vessels dilate, increasing blood flow and reducing vascular resistance.

This occurs because exercise stimulates the production of nitric oxide, a molecule that helps relax the walls of blood vessels, facilitating blood flow. Additionally, regular exercise improves endothelial function, which is the ability of blood vessels to dilate and contract as needed. Studies show that people who do aerobic exercise regularly can reduce their systolic blood pressure by up to 10 mm of mercury and diastolic blood pressure by up to 8 mm of mercury.

This effect is comparable to that of many antihypertensive medications. With continued exercise, Joan, under her doctor's guidance, was able to gradually reduce the dosage of her high blood pressure medications until she no longer needed them. In addition to controlling her blood pressure naturally, she also experienced an improvement in her overall cardiovascular health, reducing her risk of heart attacks and strokes.

Controlling high blood pressure with exercise and a good diet has additional benefits, such as avoiding side effects associated with long-term medication use. Many antihypertensive medications can cause dizziness, fatigue, headaches, and other adverse effects. By adopting a healthy lifestyle, Joan not only avoided these side effects and improved her heart health, but she also improved her health in many other ways.

Joan also suffered from gastroesophageal reflux and took medication to control her symptoms. However, by incorporating exercise into her routine, she began to notice a decrease in reflux episodes. Let's understand why.

Physical exercise helps improve the function of the lower esophageal sphincter, the valve that separates the stomach from the esophagus. When the lower esophageal sphincter is strengthened, it prevents stomach contents, such as food, stomach acid, and gas, from moving up into the esophagus. When the lower esophageal sphincter is loose or closes improperly, reflux can occur, causing symptoms such as heartburn, chest pain, throat irritation, coughing, or bad breath.

Physical exercise is particularly effective because it strengthens the abdominal muscles, promotes healthy digestion, and helps relieve pressure on the lower esophageal sphincter. . Furthermore, another important benefit of exercise is the control of stress and negative feelings that can affect the body's functioning.

Stress activates the sympathetic nervous system, reducing the activity of the vagus nerve, which regulates digestion. Regular physical exercise helps reduce stress and anxiety levels, promoting greater activity in the vagus nerve and improving digestive function. Exercises, especially strength exercises, are essential for maintaining lean mass .

They promote an increase in the number of mitochondria in muscle cells, resulting in more efficient energy metabolism. This makes it easier to eliminate excess body fat . Maintaining a healthy weight can also reduce pressure on the stomach and sphincter, further contributing to reflux prevention.

Joan's story illustrates how important strength exercises can be in this context, helping not only with body composition, but also in improving metabolism and promoting healthy digestion without reflux and, therefore, without the need for medication. However, it is important to highlight that the causes of reflux can be complex, and what worked for Joan may not be enough for other people. But Joan McDonald's transformation isn't just a story of physical change.

Exist a crucial aspect about muscles that is often overlooked: the intimate relationship between muscles and the brain. Our muscles are not just tissues responsible for movement; they act as true endocrine organs, producing substances that regulate various functions in the human body. During exercise, muscles produce substances called myochemicals, secreted by muscles in response to contractions, and act both locally and on distant organs through the blood circulation.

They play a vital role in communication between muscles and the brain, influencing various cognitive functions. For example, myochemicals improve cognitive function and increase mental resilience, helping you face challenges with more clarity and determination. In addition to myochemicals, physical exercise stimulates the production of important hormones, such as testosterone and growth hormone (GH).

Physical exercise, especially high-intensity and resistance training, creates stress on the muscles that sends signals to the endocrine system to increase the production of these hormones. Testosterone is produced mainly by the testicles in men and by the ovaries and adrenal glands in women. In both sexes, the mechanical stress of physical exercise increases the production of testosterone, which helps with muscle repair and growth, as well as maintaining bone density and general health.

Growth hormone (GH), secreted by the pituitary gland, is released in greater quantities during and after intense exercise due to the energy demand and metabolic stimulus created by exercise. GH is crucial for protein synthesis, muscle recovery and also for the mobilization of fat as an energy source. As we age, the production of these hormones tends to decrease, but regular exercise can help maintain adequate levels, delaying the effects of aging.

And that's just a summary. We could talk for hours about the benefits of physical exercise and muscles. So when you exercise, you're not just strengthening your body.

All these benefits we mentioned, and many others, count. No one needs to be a fitness model or bodybuilder, but we all need to put our muscles to good use. We need movement.

For those with physical limitations, doing what you can is a big step. Any effort counts. Joan McDonald's story is an inspiration.

At 70, she could have continued her life with medication, accepting weakness, obesity and health problems as normal. But she chose to do it differently. At 70 years old, she has surpassed her limits and shown that it is never too late to start.

And the final reflection is: there is no magic pill, but we have exercise. We can exercise at the gym, at home, using just our body weight and perhaps some dumbbells. Every step, every lift, every exposure to the sun, every drop of sweat is an investment in a brighter, healthier and happier future.

At the end of the day, it's not just about living longer, it's about living better. Get out of the comfort zone. Your future starts with the choices you make today.

After all, we are all the architects of our own destiny.