What is Hypertension?
Hypertension, commonly known as high blood pressure, is a medical condition characterized by elevated blood pressure levels persistently higher than normal. Blood pressure is the force of blood pushing against the walls of the arteries as the heart pumps blood throughout the body.
Blood pressure is typically measured using two numbers:
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Systolic pressure: The top number, which represents the pressure in the arteries when the heart beats and pumps blood out (systole).
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Diastolic pressure: The bottom number, which represents the pressure in the arteries when the heart is at rest between beats (diastole).
Blood pressure is measured in millimeters of mercury (mmHg), and a standard blood pressure reading is expressed as systolic pressure over diastolic pressure (e.g., 120/80 mmHg).
Hypertension is classified into two main categories:
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Primary (essential) hypertension: This is the most common type of hypertension and occurs when there is no identifiable cause. It tends to develop gradually over time and is often influenced by lifestyle factors such as diet, physical activity, and stress, as well as genetic predisposition and aging.
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Secondary hypertension: This type of hypertension is caused by an underlying medical condition or factor, such as kidney disease, hormonal disorders, sleep apnea, certain medications, or other health conditions. Secondary hypertension typically develops suddenly and may require specific treatment to address the underlying cause.
Risk factors
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Age: The risk of hypertension increases with age, with the majority of cases occurring in individuals over the age of 65.
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Family history: Individuals with a family history of hypertension are at increased risk of developing the condition themselves.
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Obesity: Excess body weight, particularly abdominal fat, is a significant risk factor for hypertension.
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Unhealthy lifestyle habits: Factors such as a high-sodium diet, low potassium intake, excessive alcohol consumption, smoking, physical inactivity, and chronic stress can increase the risk of hypertension.
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Ethnicity: Certain ethnic groups, including African Americans, are at higher risk of developing hypertension.
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Other medical conditions: Chronic conditions such as diabetes, kidney disease, and sleep apnea can increase the risk of hypertension.
Symptoms
Hypertension is often referred to as the "silent killer" because it typically does not cause noticeable symptoms until it reaches advanced stages or leads to complications such as heart disease, stroke, kidney disease, or vision loss. Therefore, regular blood pressure monitoring and early detection are essential for preventing and managing hypertension.
Treatment options
Treatment for hypertension typically involves lifestyle modifications and, in some cases, medication to lower blood pressure and reduce the risk of complications. Lifestyle modifications may include adopting a healthy diet (such as the DASH diet), reducing sodium intake, increasing potassium intake, engaging in regular physical activity, maintaining a healthy weight, limiting alcohol consumption, quitting smoking, managing stress, and monitoring blood pressure regularly.
Medications such as diuretics, beta-blockers, ACE inhibitors, angiotensin II receptor blockers, calcium channel blockers, and other antihypertensive drugs may be prescribed to lower blood pressure and reduce the risk of cardiovascular events in individuals with hypertension. Treatment decisions are often made in consultation with a healthcare provider based on individual blood pressure levels, overall cardiovascular risk, and medical history.
Can exercise help?
Exercise is a key component of managing hypertension (high blood pressure) and can significantly contribute to:
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Lowering blood pressure: Regular exercise, particularly aerobic exercise such as brisk walking, jogging, cycling, or swimming, helps to lower blood pressure by improving cardiovascular fitness, increasing the efficiency of the heart, and reducing peripheral resistance in the blood vessels. Exercise stimulates the release of nitric oxide, a vasodilator that helps to relax and widen blood vessels, leading to lower blood pressure levels.
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Improving cardiovascular health: Exercise strengthens the heart muscle, improves circulation, and enhances overall cardiovascular health, reducing the risk of heart disease, heart attack, and stroke associated with hypertension. Regular physical activity helps to reduce LDL (low-density lipoprotein) cholesterol levels (the "bad" cholesterol) and increase HDL (high-density lipoprotein) cholesterol levels (the "good" cholesterol), improving lipid profile and reducing the risk of atherosclerosis and cardiovascular events.
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Reduce stress and anxiety: Exercise has stress-relieving and mood-enhancing effects, reducing levels of stress hormones such as cortisol and adrenaline and promoting the release of endorphins, neurotransmitters that promote feelings of well-being and relaxation. Regular physical activity can help to reduce stress, anxiety, and depression, which are common risk factors for hypertension.
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Promote weight loss and weight management: Exercise helps to burn calories and promote weight loss, particularly abdominal fat, which is associated with elevated blood pressure levels and increased cardiovascular risk. Maintaining a healthy weight through regular physical activity can help to prevent and manage hypertension.
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Enhance insulin sensitivity: Exercise improves insulin sensitivity, allowing the body to use insulin more effectively to lower blood sugar levels. This can help prevent or delay the onset of type 2 diabetes, a common complication of hypertension, and reduce the risk of cardiovascular complications associated with diabetes.
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Reduce inflammation: Exercise has anti-inflammatory effects, reducing levels of inflammatory markers in the blood and improving overall cardiovascular health. Chronic inflammation is associated with hypertension and other cardiovascular risk factors, and regular physical activity can help to reduce inflammation and lower blood pressure levels.
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Improve sleep quality: Regular exercise can help improve sleep quality and reduce sleep disturbances, such as insomnia and sleep apnea, which are common in individuals with hypertension. Better sleep quality promotes overall cardiovascular health and helps to lower blood pressure levels.