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High blood pressure, or hypertension, is a common cardiovascular disease that affects over 20% of the global population. While exercise is generally safe for those with high blood pressure, certain movements involving heavy lifting should be avoided, as they can cause blood pressure to spike. Conversely, strength training can help lower blood pressure if done consistently. Additionally, people with more muscle than fat have a greater ability to regulate their blood pressure in response to stress, according to a Medical College of Georgia study. This is because fat, especially abdominal fat, secretes angiotensin, which directs the kidneys to absorb more sodium, leading to higher blood pressure. Therefore, building muscle can be an effective way to relieve high blood pressure.
| Characteristics | Values |
|---|---|
| Muscle type | Vascular smooth muscle cells |
| Muscle mass | Higher muscle mass than fat is associated with better blood pressure regulation |
| Muscle mass effect | Increased muscle mass leads to arterial stiffness and carotid intima-media thickness progression |
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What You'll Learn
More muscle mass helps regulate blood pressure
While it may seem counterintuitive, more muscle mass does indeed help regulate blood pressure. This is especially true when it comes to obesity, which is a major risk factor for high blood pressure and is associated with hypertension and chronic kidney disease. Exercise, particularly strength training, can help to ameliorate these conditions, even without weight loss.
The American Heart Association recommends that people with high blood pressure carry out 150 minutes of moderate- to vigorous-intensity workouts every week. Moderate activities include brisk walking and cycling, while vigorous activities include running, interval training, and other demanding forms of exercise. Most types of strength training, including weight lifting, are considered safe and beneficial for people who take medication for high blood pressure. However, lifting very heavy weights should be avoided. Instead, beginners should start with exercise bands or light hand weights.
The reason why more muscle mass helps regulate blood pressure is that building muscle causes the body to burn more calories at rest, helping to reduce fat throughout the body, including visceral fat around the organs. Visceral fat is linked to high blood pressure because it causes the arteries to become thick and stiff, making it harder to push blood around the body and creating more pressure. Additionally, visceral fat interacts with the kidneys and adrenal glands, which are responsible for regulating blood pressure.
Research has also shown that increased muscle mass protects against hypertension and renal injury in obesity. One study found that deleting the myostatin gene in mice increased skeletal muscle mass by 50-60% without weight loss or a reduction in fat mass. This prevented increased blood pressure in obesity, although it did not provide additional benefits against salt loading.
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Strength training can help lower blood pressure
Strength training, also known as resistance training, is a type of exercise that works your muscles against an opposing force. It can be performed using your own body weight or equipment such as elastic bands, dumbbells, or specialized machines. Strength training can be dynamic, involving movement of the muscles and joints (e.g., bicep curls or squats), or isometric, performed against an immovable object (e.g., planks or wall sits).
For individuals with high blood pressure, it is important to take certain precautions when engaging in strength training. While most types of strength training are considered safe, it is recommended to avoid lifting very heavy weights, as the sudden intense effort can cause a dangerous surge in blood pressure, especially if holding your breath during the lift. Instead, it is advised to lift moderate or heavy weights that allow for multiple repetitions. It is also crucial to breathe properly during strength training exercises, exhaling during the exertion phase (lifting, pushing, or pulling) and inhaling during the relaxation phase.
Before starting a new strength training regimen, it is always recommended to consult with a healthcare professional, especially for those with very high blood pressure or a history of heart disease. Strength training can be an effective tool in managing and preventing various health conditions, including heart disease, diabetes, and arthritis, and can contribute to overall heart health when incorporated into a consistent exercise routine.
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Exercise can increase blood pressure
While exercise can temporarily increase blood pressure, it is important to note that regular exercise is beneficial for managing blood pressure and overall health. It can help regulate blood pressure and reduce the risk of heart disease, certain types of cancer, diabetes, obesity, kidney failure, osteoporosis, and gallstones. Research has shown that several types of exercise, including aerobic exercise, high-intensity interval training, dynamic resistance training, and isometric exercise training, can effectively lower resting blood pressure.
However, people with high blood pressure should be cautious when engaging in intense exercises that involve lifting heavy weights. The sudden and intense effort can cause a spike in blood pressure, especially if the person holds their breath during the activity. Therefore, it is recommended to exhale while lifting, pushing, or pulling and inhale while releasing the weight. Additionally, those with low blood pressure should opt for moderate activities that do not involve quick changes in position, such as bending and rising to an upright position.
Overall, while exercise can temporarily increase blood pressure, it is generally safe and beneficial for individuals with low or high blood pressure when done appropriately. It is always advisable to consult a doctor or healthcare professional before starting a new exercise program, especially if you have any concerns or health conditions.
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Hypertension is a cardiovascular risk factor
Hypertension, or high blood pressure, is a common cardiovascular risk factor. It is a condition where blood pressure is consistently too high, with systolic pressure (the top number) over 120 mm Hg and diastolic pressure (the bottom number) over 80 mm Hg. Hypertension is often undiagnosed, with 32.6% of adults in the United States having the condition and an additional 36.3% having prehypertension.
During exercise, blood pressure increases to meet the muscles' greater demand for oxygen. However, abnormal blood pressure increases during moderate exercise may indicate undetected heart disease. Hypertensive response to exercise (HRE) is a condition where blood pressure spikes dramatically during physical activity.
Strength training, such as weight lifting, is considered safe and beneficial for people with well-controlled blood pressure. However, people with high blood pressure should avoid lifting very heavy weights, as the intense effort can cause a dangerous spike in blood pressure, especially if they hold their breath.
Large cohort studies have demonstrated that high blood pressure is a significant risk factor for various cardiovascular issues, including heart failure, atrial fibrillation, chronic kidney disease, heart valve diseases, aortic syndromes, and dementia, in addition to coronary heart disease and stroke. The risk of developing cardiovascular disease increases with age, and the impact of age on risk is so strong that young adults are unlikely to reach high-risk levels even with multiple risk factors.
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Vascular smooth muscle cells regulate blood flow
Vascular smooth muscle cells (VSMCs) are the most abundant cell type in blood vessels. They are small, mononucleate, and spindle-shaped, usually arranged in helical or circular layers around large blood vessels and in a single layer around arterioles.
The primary function of VSMCs is to regulate blood flow and pressure by contracting and dilating in response to stimuli, thereby altering the volume of blood vessels and local blood pressure. This is achieved through the control of total peripheral resistance, arterial and venous tone, and the distribution of blood flow throughout the body. The contractile properties of VSMCs allow them to regulate vessel diameter, blood pressure, and blood flow distribution.
VSMCs are particularly important in arteries, where they regulate the flow of oxygenated blood from the heart to organs and tissues, including the brain. In the brain, VSMCs surround cerebral blood vessels and are considered a major determinant of cerebral blood flow.
Additionally, VSMCs play a crucial role in vascular development and stability. They wrap around larger vessels, influencing vascular resistance, endothelial network growth, and vessel stability. Dysfunction of VSMCs can contribute to various vascular pathologies, including vasculitis, atherosclerosis, and hypertension.
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Frequently asked questions
Vascular smooth muscle cells are fundamental to regulating blood flow and are, therefore, very important in blood pressure control. When they are activated, they contract, causing the vessels to shrink and leading to an increase in blood pressure.
Most types of strength training, including weightlifting, are safe and beneficial for people who take medication for high blood pressure. However, lifting very heavy weights should be avoided.
Most adults should do strength training exercises at least two days a week. Beginners should start with exercise bands or light hand weights, and more experienced people can use weight machines.
