Benefits of physical activity

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The benefits of physical activity range widely. Most types of physical activity improve health and well-being.

Contents

Physical activity refers to any body movement that burns calories. “Exercise,” a subcategory of physical activity, refers to planned, structured, and repetitive activities aimed at improving physical fitness and health. [1] Insufficient physical activity is the most common health issue in the world. Staying physically active can help prevent or delay certain diseases, including cancer, stroke, hypertension, heart disease, and diabetes. It can also relieve depression and improve mood. [2]

Two and a half hours of moderate-intensity exercise per week is recommended for reducing the risk of health issues. [3] [4] [5] However, even doing a small amount of exercise is healthier than doing none. [6] [7]

Immediate benefits

Some of the benefits of physical activity on brain health happen right after a session of moderate to vigorous physical activity. Benefits include improved thinking or cognition for children ages 6-13, short-term reduction of anxiety for adults, and enhanced functional capacity in older adults. [8] Regular physical activity can keep thinking, learning, and judgment skills sharp with age. It can also reduce the risk of depression and anxiety and improve sleep. [9]

Weight management

Both dieting and physical activity play a critical role in maintaining healthy body weight, or maintaining successful weight loss. [10] Physical activity helps control weight by using excess calories that would otherwise be stored as fat. Most activities burn calories, including sleeping, breathing, and digesting food. Balancing the calories consumed with the calories burned through physical activity will maintain one's weight. [11]

Long-term benefits

Frequent physical activity lowers the risk of cardiovascular diseases, type 2 diabetes, and some cancers. [10]

Obesity is a complex disease that affects whole-body metabolism and is associated with an increased risk of cardiovascular disease (CVD) and Type 2 diabetes (T2D). Physical exercise results in numerous health benefits and is an important tool to combat obesity and its co-morbidities, including cardiovascular diseases. Exercise prevents both the onset and development of cardiovascular disease and is an important therapeutic tool to improve outcomes for patients with cardiovascular disease. Some benefits of exercise include enhanced mitochondrial function, restoration and improvement of vasculature, and the release of myokines from skeletal muscle that preserve or augment cardiovascular function. In this review, we will discuss the mechanisms through which exercise promotes cardiovascular health. Regular physical exercise has several beneficial effects on overall health. While decreasing body mass and adiposity are not the primary outcomes of exercise, exercise can mediate several diseases that accompany obesity, including T2D and CVD. Several recent studies have shown that sustained physical activity is associated with decreased markers of inflammation, improved metabolic health, decreased risk of heart failure, and improved overall survival. [12] [13] [14] There are several risk factors leading to the development and progression of CVD, but one of the most prominent is a sedentary lifestyle. A sedentary lifestyle can be characterized by both obesity and consistently low levels of physical activity. Thus, lifestyle interventions that aim to increase physical activity and decrease obesity are attractive therapeutic methods to combat most non-congenital types of CVD. [15]

Effect on cardiovascular risk factors

Regular physical exercise is associated with numerous health benefits to reduce the progression and development of diseases. Several randomized clinical trials have demonstrated that lifestyle interventions, including moderate exercise and a healthy diet, improve cardiovascular health in at-risk populations. Individuals with metabolic syndrome who participated in a 4-month program of either a diet (caloric restriction) or exercise intervention had reduced adiposity, decreased systolic, diastolic, and mean arterial blood pressure, and lower total and low-density lipoprotein (LDL) cholesterol lipid profiles compared to the control group. Both the diet and exercise interventions improve these cardiovascular outcomes to a similar extent. [15]

Several previous studies have investigated the effects of diet and exercise, independently or in combination, on metabolic and cardiovascular health and have determined that diet, exercise, or a combination of diet and exercise induces weight loss, decreases visceral adiposity, lowers plasma triglycerides, plasma glucose, HDL levels, and blood pressure, and improves VO2max. Studies have shown that exercise can improve metabolic and cardiovascular health independent of changes in body weight, including improved glucose homeostasis, endothelial function, blood pressure, and HDL levels. These data indicate exercise, independent of changes in body mass, results in significant improvements in cardiovascular and metabolic health. Although a detailed analysis of the vast impact of diet on cardiometabolic health is outside the scope of this review, the importance of diet and exercise in tandem should not be ignored, as many studies have shown that cardiometabolic health is improved to a higher extent in response to a combined diet and exercise programs compared to either intervention alone. [15]

Exercise has a similar effect on cardiovascular improvements in lean and overweight normoglycemic subjects. In a 1-year study of non-obese individuals, a 16–20% increase in energy expenditure (of any form of exercise) with no diet intervention resulted in a 22.3% decrease in body fat mass and reduced LDL cholesterol, total cholesterol/HDL ratio, and C-reactive protein concentrations, all risk factors associated with CVD. In overweight individuals, 7–9 months of low-intensity exercise (walking ~19 km per week at 40–55% VO2peak) significantly increased cardiorespiratory fitness compared to sedentary individuals. Together these data indicate that exercise interventions decrease the risk or severity of CVD in subjects who are lean, obese, or have type 2 diabetes. [15]

Cardiac rehabilitation

Exercise is also an important therapeutic treatment for patients who have cardiovascular diseases. A systematic review of 63 studies found that exercise-based cardiac rehabilitation improved cardiovascular function. These studies consisted of various forms of aerobic exercise at a range of intensities (from 50 to 95% VO2), over a multitude of time periods (1–47 months). Overall, exercise significantly reduced CVD-related mortality, decreased risk of MI, and improved quality of life. Another study looked specifically at patients with atherosclerosis post-revascularization surgery. Patients who underwent 60 min of exercise per day on a cycle ergometer for 4 weeks had an increased blood flow reserve (29%) and improved endothelium-dependent vasodilatation. A recent study provided personalized aerobic exercise rehabilitation programs for patients who had an acute myocardial infarction for 1 year after a coronary intervention surgery. The patients who underwent the exercise rehabilitation program had increased ejection fraction (60.81 vs. 53% control group), increased exercise tolerance, and reduced cardiovascular risk factors 6 months after starting the exercise rehabilitation program. This improvement in cardiovascular health in patients with atherosclerosis or post-MI is likely the result of increased myocardial perfusion in response to exercise, however, more research is required to fully understand these mechanisms. [15]

One defining characteristic of heart failure is exercise intolerance, which resulted in a prescription for bed rest for these patients until the 1950s. However, it has now been shown that a monitored rehabilitation program using moderate-intensity exercise is safe for heart failure patients, and this has now become an important therapy for patients with heart failure. Meta-analyses and systemic reviews have shown that exercise training in heart failure patients is associated with improved quality of life, reduced risk of hospitalization and decreased rates of long-term mortality. One study of heart failure patients found that aerobic exercise (walking or cycling) at 60–70% of heart rate reserve 3–5 times per week for over 3 years led to improved health and overall quality of life (determined by a self-reported Kansas City Cardiomyopathy Questionnaire, a 23-question disease-specific questionnaire). Other studies have shown that exercise-based rehabilitation at a moderate intensity in heart failure patients improves cardiorespiratory fitness and increases both exercise endurance capacity and VO2max (12–31% increase). [15]

More recent studies have examined the effects of high-intensity exercise on patients with heart failure. A recent study found that 12 weeks of high-intensity interval training (HIIT) in heart failure patients (with reduced ejection fraction) was well-tolerated and had similar benefits compared to patients who underwent moderate continuous exercise (MCE) training, including improved left ventricular remodeling and aerobic capacity. A separate study found that 4 weeks of HIIT in heart failure patients with preserved ejection fraction improved VO2peak and reduced diastolic dysfunction compared to both pre-training values and compared to the MCE group. These studies indicate that both moderate and high-intensity exercise training improve cardiovascular function in heart failure patients, likely related to increased endothelium-dependent vasodilation and improved aerobic capacity. [15]

Other benefits

Bones and muscles

Routine physical activity is important for building strong bones and muscles in children, but it is equally important for older adults. Bones and muscles work together to support daily movements. Physical activity strengthens muscles. Bones adapt by building more cells, and as a result, both become stronger. Strong bones and muscles protect against injury and improve balance and coordination. In addition, active adults experience less joint stiffness and improved flexibility. This becomes especially important with age, as it helps to prevent falls and the broken bones that may result. For those with arthritis, an exercise that keeps the muscles around the joint strong can act like a brace that will react to movement without the use of an actual brace. [16]

Daily activity

The ability to perform daily activities and maintain independence requires strong muscles, balance, and endurance. Regular physical activity or exercise helps to improve and prevent the decline of muscalking, getting up out of a chair or leaning over to pick something up. Balance problems can reduce independence by interfering with activities of daily living. Regular physical activity can improve balance and reduce the risk of falling. [17] Exercising regularly has many benefits for both your physical and mental health.

Cancer

Exercise increases the chances of surviving cancer. If one exercises during the early stages of cancer treatment it may allow time to reduce the detrimental side effects of the chemotherapy. It also improves physical functions along with reducing distress and fatigue. [18] Studies have shown that exercise has the possibility to improve the chemotherapy drug uptake, thanks to the increase in peripheral circulation. [18] This also makes changes to tumor vasculature from the increase of cardio and blood pressure.

Stroke

Regular physical activity and exercise decrease the risk of ischemic stroke and intracerebral hemorrhage. [19] [20] [21] There is a dose-response relationship between increased physical activity and the risk of stroke. [22] Being physically active before a stroke is associated with decreased admission stroke severity and improved post-stroke outcomes. [23] Research indicates that individuals who engage in regular physical activity before experiencing a stroke demonstrate fewer stroke symptoms, smaller infarct volumes in ischemic strokes, smaller hematoma volumes in intracerebral hemorrhages, and higher post-stroke survival rates. [24] [25] [26] Being physically active after a stroke is associated with improved recovery and function. [27]

Sleep condition

Exercise triggers an increase in body temperature, and the post-exercise drop in temperature may promote falling asleep. Exercise may also reduce insomnia by decreasing arousal, anxiety, and depressive symptoms. Insomnia is commonly linked with elevated arousal, anxiety, and depression, and exercise has effects on reducing these symptoms in the general population. [28] These issues count among the most common among most of the population. Anxiety disorders are the most common mental illness in the U.S., affecting 40 million adults in the United States age 18 and older, or 18.1% of the population every year. [29] A 2010 review suggested that exercise generally improved sleep for most people, and may help with insomnia, but there is insufficient evidence to draw detailed conclusions about the relationship between exercise and sleep. [30] [31] A 2020 systematic review and meta-analysis suggested that physical activity has little association with sleep in healthy children. [32] However, there have been several research findings indicating that certain forms of physical activity can improve the quality and duration of sleep. [33] In fact, a 2019 study at The Federal University of São Paulo concluded that moderate physical activity resulted in an increase in sleep efficiency and duration in adults diagnosed with insomnia. [34] The duration refers to the hours of sleep a person gets on a nightly basis, while the quality indicates how well or sufficient it was. [35] Having poor sleep quality can lead to negative short-term consequences like emotional distress and performance deficits. The psychosocial issues associated with these consequences can vary between adults, adolescents, and children. Some of the long-term effects of poor sleep quality can lead to conditions like hypertension, metabolic syndrome, and even weight-related issues. [36]

See also

Related Research Articles

<span class="mw-page-title-main">Coronary artery disease</span> Reduction of blood flow to the heart

Coronary artery disease (CAD), also called coronary heart disease (CHD), or ischemic heart disease (IHD), is a type of heart disease involving the reduction of blood flow to the cardiac muscle due to a build-up of atheromatous plaque in the arteries of the heart. It is the most common of the cardiovascular diseases. CAD can cause stable angina, unstable angina, myocardial ischemia, and myocardial infarction.

Insulin resistance (IR) is a pathological condition in which cells in insulin-sensitive tissues in the body fail to respond normally to the hormone insulin or downregulate insulin receptors in response to hyperinsulinemia.

<span class="mw-page-title-main">Obesity</span> Medical condition of excess body fat

Obesity is a medical condition, sometimes considered a disease, in which excess body fat has accumulated to such an extent that it can potentially have negative effects on health. People are classified as obese when their body mass index (BMI)—a person's weight divided by the square of the person's height—is over 30 kg/m2; the range 25–30 kg/m2 is defined as overweight. Some East Asian countries use lower values to calculate obesity. Obesity is a major cause of disability and is correlated with various diseases and conditions, particularly cardiovascular diseases, type 2 diabetes, obstructive sleep apnea, certain types of cancer, and osteoarthritis.

<span class="mw-page-title-main">Angina</span> Chest discomfort due to disorder of the heart muscles

Angina, also known as angina pectoris, is chest pain or pressure, usually caused by insufficient blood flow to the heart muscle (myocardium). It is most commonly a symptom of coronary artery disease.

<span class="mw-page-title-main">Type 2 diabetes</span> Form of diabetes mellitus

Type 2 diabetes (T2D), formerly known as adult-onset diabetes, is a form of diabetes mellitus that is characterized by high blood sugar, insulin resistance, and relative lack of insulin. Common symptoms include increased thirst, frequent urination, fatigue and unexplained weight loss. Other symptoms include increased hunger, having a sensation of pins and needles, and sores (wounds) that heal slowly. Symptoms often develop slowly. Long-term complications from high blood sugar include heart disease, stroke, diabetic retinopathy, which can result in blindness, kidney failure, and poor blood flow in the lower-limbs, which may lead to amputations. The sudden onset of hyperosmolar hyperglycemic state may occur; however, ketoacidosis is uncommon.

<span class="mw-page-title-main">Exercise</span> Physical activity that improves health

Exercise or workout is physical activity that enhances or maintains fitness and overall health. which is performed for various reasons, including weight loss or maintenance, to aid growth and improve strength, develop muscles and the cardiovascular system, prevent injuries, hone athletic skills, improve health, or simply for enjoyment. Many people choose to exercise outdoors where they can congregate in groups, socialize, and improve well-being as well as mental health.

<span class="mw-page-title-main">Weight loss</span> Reduction of the total body mass

Weight loss, in the context of medicine, health, or physical fitness, refers to a reduction of the total body mass, by a mean loss of fluid, body fat, or lean mass. Weight loss can either occur unintentionally because of malnourishment or an underlying disease, or from a conscious effort to improve an actual or perceived overweight or obese state. "Unexplained" weight loss that is not caused by reduction in calorific intake or increase in exercise is called cachexia and may be a symptom of a serious medical condition.

<span class="mw-page-title-main">Physical fitness</span> State of health and well-being

Physical fitness is a state of health and well-being and, more specifically, the ability to perform aspects of sports, occupations, and daily activities. Physical fitness is generally achieved through proper nutrition, moderate-vigorous physical exercise, and sufficient rest along with a formal recovery plan.

<span class="mw-page-title-main">Cardiovascular disease</span> Class of diseases that involve the heart or blood vessels

Cardiovascular disease (CVD) is any disease involving the heart or blood vessels. CVDs constitute a class of diseases that includes: coronary artery diseases, heart failure, hypertensive heart disease, rheumatic heart disease, cardiomyopathy, arrhythmia, congenital heart disease, valvular heart disease, carditis, aortic aneurysms, peripheral artery disease, thromboembolic disease, and venous thrombosis.

<span class="mw-page-title-main">High-intensity interval training</span> Exercise strategy

High-intensity interval training (HIIT) is a training protocol alternating short periods of intense or explosive anaerobic exercise with brief recovery periods until the point of exhaustion. HIIT involves exercises performed in repeated quick bursts at maximum or near maximal effort with periods of rest or low activity between bouts. The very high level of intensity, the interval duration, and number of bouts distinguish it from aerobic (cardiovascular) activity, because the body significantly recruits anaerobic energy systems. The method thereby relies on "the anaerobic energy releasing system almost maximally".

<span class="mw-page-title-main">Framingham Heart Study</span> Cardiovascular cohort study

The Framingham Heart Study is a long-term, ongoing cardiovascular cohort study of residents of the city of Framingham, Massachusetts. The study began in 1948 with 5,209 adult subjects from Framingham, and is now on its third generation of participants. Prior to the study almost nothing was known about the epidemiology of hypertensive or arteriosclerotic cardiovascular disease. Much of the now-common knowledge concerning heart disease, such as the effects of diet, exercise, and common medications such as aspirin, is based on this longitudinal study. It is a project of the National Heart, Lung, and Blood Institute, in collaboration with Boston University. Various health professionals from the hospitals and universities of Greater Boston staff the project.

Cardiorespiratory fitness (CRF) refers to the ability of the circulatory and respiratory systems to supply oxygen to skeletal muscles during sustained physical activity. Scientists and researchers use CRF to assess the functional capacity of the respiratory and cardiovascular systems. These functions include ventilation, perfusion, gas exchange, vasodilation, and delivery of oxygen to the body's tissues. As these body's functions are vital to an individual's health, CRF allows observers to quantify an individual's morbidity and mortality risk as a function of cardiorespiratory health.

General fitness training works towards broad goals of overall health and well-being, rather than narrow goals of sport competition, larger muscles or concerns over appearance. A regular moderate workout regimen and healthy diet can improve general appearance markers of good health such as muscle tone, healthy skin, hair and nails, while preventing age or lifestyle-related reductions in health and the series of heart and organ failures that accompany inactivity and poor diet.

<span class="mw-page-title-main">Non-communicable disease</span> Medical conditions that cannot transmit from one individual to another

A non-communicable disease (NCD) is a disease that is not transmissible directly from one person to another. NCDs include Parkinson's disease, autoimmune diseases, strokes, heart diseases, cancers, diabetes, chronic kidney disease, osteoarthritis, osteoporosis, Alzheimer's disease, cataracts, and others. NCDs may be chronic or acute. Most are non-infectious, although there are some non-communicable infectious diseases, such as parasitic diseases in which the parasite's life cycle does not include direct host-to-host transmission.

<span class="mw-page-title-main">Sarcopenic obesity</span> Medical condition: obesity and loss of muscle

Sarcopenic obesity is a combination of two disease states, sarcopenia and obesity. Sarcopenia is the muscle mass/strength/physical function loss associated with increased age, and obesity is based off a weight to height ratio or body mass index (BMI) that is characterized by high body fat or being overweight.

<span class="mw-page-title-main">Myocardial infarction</span> Interruption of cardiac blood supply

A myocardial infarction (MI), commonly known as a heart attack, occurs when blood flow decreases or stops in one of the coronary arteries of the heart, causing infarction to the heart muscle. The most common symptom is retrosternal chest pain or discomfort that classically radiates to the left shoulder, arm, or jaw. The pain may occasionally feel like heartburn. This is the dangerous type of Acute coronary syndrome.

Management of obesity can include lifestyle changes, medications, or surgery. Although many studies have sought effective interventions, there is currently no evidence-based, well-defined, and efficient intervention to prevent obesity.

<span class="mw-page-title-main">Cardiovascular fitness</span> Heart-related component of physical fitness

Cardiovascular fitness is a component of physical fitness, which refers to a person's ability to deliver oxygen to the working muscles, including the heart. Cardiovascular fitness is improved by sustained physical activity (see also Endurance Training) and is affected by many physiological parameters, including cardiac output (determined by heart rate multiplied by stroke volume), vascular patency, and maximal oxygen consumption (i.e. VO2 max).

Occupational cardiovascular diseases (CVD) are diseases of the heart or blood vessels caused by working conditions, making them a form of occupational illness. These diseases include coronary heart disease, stroke, cardiomyopathy, arrhythmia, and heart valve or heart chamber problems. Cardiovascular disease is the leading cause of death in the United States and worldwide. In the United States, cardiovascular diseases account for one out of four deaths. The 6th International Conference on Work Environment and Cardiovascular Diseases found that within the working age population about 10-20% of cardiovascular disease deaths can be attributed to work. Ten workplace stressors and risk factors were estimated to be associated with 120,000 U.S. deaths each year and account for 5-8% of health care costs.

Cardiovascular disease in women is an integral area of research in the ongoing studies of women's health. Cardiovascular disease (CVD) is an umbrella term for a wide range of diseases affecting the heart and blood vessels, including but not limited to, coronary artery disease, stroke, cardiomyopathy, myocardial infarctions, and aortic aneurysms.

References

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