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Arthritis is a disease that affects the joints, causing stiffness, pain, and fatigue. It can limit the range of motion in joints and cause swelling and tenderness. There are over 100 types of arthritis, but the most common type is osteoarthritis, which occurs as a result of aging. Arthritis can cause loss of motion and weak muscles due to the degeneration of joints and the surrounding muscles. This can lead to a reduced range of motion and difficulty in performing daily activities. Physical therapy and exercise can help improve strength and range of motion in people with arthritis. In addition, muscle weakness is a common symptom of rheumatoid arthritis, which can significantly reduce a person's quality of life and work ability.
| Characteristics | Values |
|---|---|
| Types of arthritis | Rheumatoid arthritis, osteoarthritis, septic arthritis, gout |
| Symptoms | Joint pain, stiffness, reduced range of motion, swelling, skin discolouration, tenderness, warmth near joints, weight loss, fever |
| Causes | Ageing, mechanical abnormalities, infection, high uric acid levels in blood, immune system damaging joints |
| Treatments | Injections, corticosteroids, disease modifiers, sleep medications, physical therapy, occupational therapy, surgery |
| Arthritis and muscle weakness | Muscle weakness is commonly reported by patients with rheumatoid arthritis, and has been observed in patients with osteoarthritis |
| Impact of muscle weakness | Reduced quality of life, decreased work ability, increased burden on society |
| Mechanism of muscle weakness | Intracellular muscle dysfunction, decreased myofibrillar Ca2+ sensitivity, impaired ability of cross-bridges to generate force, loss of force-producing myofibrillar proteins |
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What You'll Learn
Rheumatoid arthritis can cause muscle weakness
Arthritis is a condition that affects the joints, causing pain, stiffness, and reduced range of motion. There are over 100 types of arthritis, but the most common type is degenerative joint disease (osteoarthritis). Another type is rheumatoid arthritis (RA), an inflammatory form of arthritis that affects the joints and causes joint inflammation, swelling, stiffness, tenderness, redness, and warmth. RA can also lead to a metabolic state called rheumatoid cachexia, or muscle wasting.
RA patients commonly report muscle weakness, which can reduce their quality of life and increase society's burden as patients' work ability decreases. A 25-70% reduction in muscular strength has been observed in patients with RA compared to healthy individuals. This reduction in muscle strength is often larger than what could be explained by the reduction in muscle size, indicating that intracellular muscle dysfunction plays a role in RA-associated muscle weakness.
The exact causes of rheumatoid cachexia are unknown, but it is believed that several factors contribute to its development. These include chronic inflammation, lack of physical activity due to joint pain and stiffness, and metabolic changes leading to muscle loss and weakness. In addition, actin aggregates, which are associated with reduced actomyosin ATPase activity and lower force production, have been detected in the skeletal muscles of rodents with arthritis.
To counteract RA-associated muscle weakness, a combination of pharmacological intervention and exercise can be beneficial. For example, EUK-134 or RyR1-stabilizing compounds, along with muscle strength exercises and methotrexate, can improve intrinsic muscle function and reduce disease activity. Physical therapy or occupational therapy can also help improve strength and range of motion in individuals with RA.
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Osteoarthritis and muscle wasting
Osteoarthritis (OA) is a multifactorial joint disorder resulting in degeneration of synovial joints. Knee and hip OA are extremely prevalent and their occurrence increases with ageing. OA is associated with degeneration of the joint, with pathological changes to multiple musculoskeletal tissues such as cartilage, meniscus, ligament and synovium.
Muscle wasting is an important feature of OA. Muscle impairments associated with the disease may be the primary underlying cause of functional impairments, and muscle dysfunction may precede and expedite cartilage deterioration. Patients with knee OA demonstrate reduced functional capacity that can be attributed to joint pain, stiffness, and loss of muscular strength of the lower extremity muscles. Subjects with knee OA have significant muscle impairments, which affect physical function and should be targeted in therapy.
The molecular mechanisms underlying muscle wasting in OA are not well understood, but they are probably related to changes in gene expression and epigenetic modifications. It is becoming clear that skeletal muscle wasting plays an important role in OA development and/or progression.
OA patients experience joint pain, stiffness, and a reduced range of motion. Exercise helps to lessen pain, increases movement, reduces fatigue, and helps patients look and feel better. Exercise programmes focusing on neuromuscular control are generally well tolerated in OA patients and show results similar to more traditional strengthening exercises.
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Joint inflammation and septic arthritis
Arthritis is a condition that affects the joints, causing stiffness, pain, and fatigue. Joint inflammation is a common symptom of arthritis, and it can manifest as swelling, stiffness, tenderness, redness, or warmth in the joints. This joint inflammation can be caused by various factors, including mechanical abnormalities, infections, or degenerative joint diseases like osteoarthritis.
One of the more severe consequences of joint inflammation is septic arthritis, a painful infection that develops in the joints. Septic arthritis occurs when an infection spreads to one or more joints, causing inflammation of the cartilage and synovial fluid that lubricates the joints. The infection usually originates from another part of the body and travels through the bloodstream to the joint, where it can quickly damage the cartilage and bone. The knees, hips, shoulders, elbows, wrists, and fingers are the most commonly affected joints.
People with existing joint problems, such as osteoarthritis, rheumatoid arthritis, or previous joint injuries, are at an increased risk of developing septic arthritis. Additionally, those with artificial joints are vulnerable to bacteria introduced during joint replacement surgery or subsequent infections. Septic arthritis can also arise from penetrating injuries, such as animal bites, puncture wounds, or surgical procedures in or near a joint, providing an entry point for germs.
The symptoms of septic arthritis include extreme discomfort, joint pain, swelling, redness, warmth, and limited mobility in the affected joint. It is a serious condition that requires prompt medical attention and treatment with antibiotics to prevent permanent joint damage and potential life-threatening complications. Early diagnosis is crucial, and treatment options may include draining the joint fluid, surgery, or physical therapy, depending on the patient's symptoms and overall health.
In summary, joint inflammation is a common symptom of arthritis and can lead to the development of septic arthritis if left untreated. Septic arthritis is a severe condition caused by an infection spreading to the joints, resulting in inflammation and potential joint damage. Early diagnosis and treatment of both arthritis and septic arthritis are essential to prevent long-term complications and maintain joint health and mobility.
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Arthritis and physical therapy
Arthritis is a chronic condition that can affect physical health, mental well-being, and quality of life. It is a common joint disease characterised by articular cartilage erosion, osteophyte formation, subchondral sclerosis, and a series of biochemical and morphological changes in the synovium and articular cavity. The most common types of arthritis are osteoarthritis (OA) and rheumatoid arthritis (RA). Arthritis symptoms include joint pain, stiffness, swelling, tenderness, redness, and reduced range of motion.
Physical therapy (PT) is a promising treatment option for arthritis that can help manage symptoms, increase mobility, and improve physical function. PT focuses on the body's ability to engage in movement, which can be anything from getting in and out of chairs to climbing stairs, walking, playing sports, or doing recreational activities. PT can help you get moving safely and effectively, and physical therapists will teach you how to do things in your treatment plan, such as performing certain exercises or using hot and cold compresses. They will also evaluate your posture, muscle imbalances, and body mechanics, and teach you how to improve the way you move to prevent injury, reduce pain, and align your body.
PT for arthritis typically involves developing an individualised plan of exercises designed to improve flexibility, strength, coordination, and balance to achieve optimal physical function. This can include range-of-motion exercises to reduce stiffness, as well as exercises to increase strength, balance, and flexibility. Aquatic therapy, swimming, and gardening are also recommended. It's important to note that exercising should not make your symptoms worse or cause pain, but some exercises may be challenging, especially in the beginning. It is recommended to consult your doctor or physical therapist before beginning an exercise program for arthritis.
In addition to exercises, physical therapists can recommend different treatment options, such as braces and splints to support joints, shoe inserts to relieve stress on the lower extremities, and hot and cold therapy to ease joint pain and stiffness. They may also suggest modifications to your environment, such as ergonomic chairs or cushioned mats, to relieve pain and improve function.
Overall, physical therapy can have a positive impact on arthritis symptoms, helping individuals move better and improve their overall well-being.
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Arthritis and surgery
Arthritis is a chronic condition that can sometimes lead to disability. It affects people of all ages but is more common as people get older. There are over 100 types of arthritis, and most forms are chronic and may last a lifetime. The most common type is degenerative joint disease (osteoarthritis). Arthritis usually causes stiffness, pain, and fatigue, and can limit how far or how easily a joint can move.
In some cases, arthritis can cause serious damage to the joints, and surgery may be required. Surgery can help fix or replace a damaged joint, reduce pain, and improve the way the joint functions. Joint replacement surgery can be performed on the hip, knee, ankle, wrist, shoulder, and elbow. The success of the surgery depends on several factors, including the patient's overall health, their ability to adhere to a physical therapy regimen, and the surgeon's skill.
There are several types of arthritis surgery. Synovectomy is the removal of the diseased synovium, which reduces pain and swelling and prevents or slows down joint destruction. However, the synovium often grows back, and the problem can reoccur. Osteotomy is the correction of bone deformity by cutting and repositioning the bone. Resection is the removal of part or all of a bone, often done to alleviate pain. Arthrodesis or fusion surgery involves joining two or more bones to make one continuous joint. Joint resurfacing involves replacing a damaged part of the joint with an implant. Total joint replacement (TJR) involves removing parts of an arthritic or damaged joint and replacing them with a metal, plastic, or ceramic prosthesis.
Prior to surgery, a physical therapist can perform a functional evaluation to determine if the planned surgery will offer the desired benefit. The therapist can also help plan for any equipment the patient may need after surgery, such as walkers or canes. It is important for patients to understand the surgery and be committed to the process, which may include physical therapy before and after the operation.
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Frequently asked questions
Yes, muscle weakness is commonly reported by patients with rheumatoid arthritis. Osteoarthritis, another common type of arthritis, is also associated with muscle wasting and loss of muscle mass and function.
Yes, arthritis can cause stiffness or reduced range of motion. This is due to the degeneration of synovial joints, which can lead to pain and disability.
Yes, arthritis can cause weight loss, but this is not a common symptom. Other symptoms include joint pain, swelling, skin discolouration, tenderness, and stiffness.
