Exercises for the Knee with Osteoarthritis: Practical Guide

To learn more, consult the guide on Knee Osteoarthritis (Gonarthrosis): Exercises and Treatment. To learn more, consult the guide on Patellar Tendinitis: when jumper’s knee stops sports. To learn more, consult the guide on Runner’s knee pain: how to prevent and treat patellofemoral syndrome with the return of spring running.

Knee osteoarthritis, scientifically known as gonarthrosis, represents one of the most widespread and debilitating musculoskeletal conditions globally, affecting millions of people and significantly compromising their quality of life. Characterized by the progressive degeneration of articular cartilage, this chronic pathology can lead to persistent pain, stiffness, functional limitation, and, in more advanced cases, severe disability. Although there is no definitive cure for osteoarthritis, effective symptom management and slowing down disease progression are achievable goals through a multimodal therapeutic approach, at the center of which are knee osteoarthritis exercises.

With over thirty years of clinical experience in the field of rehabilitation, it is evident that targeted and personalized physical activity is not only a fundamental pillar but often the most powerful strategy available for patients suffering from gonarthrosis. This article aims to provide a comprehensive and in-depth guide to knee osteoarthritis, exploring its causes, symptoms, diagnostic methods, and treatment options, with a particular focus on the crucial role of physiotherapy and, in detail, specific therapeutic exercises. The objective is to offer an authoritative and practical resource, based on the latest scientific evidence and consolidated clinical experience, to help patients understand, manage, and improve their condition.

Table of Contents

• Understanding Knee Osteoarthritis (Gonarthrosis)
• Diagnosis of Knee Osteoarthritis
• The Multimodal Therapeutic Approach
• The Fundamental Role of Physiotherapy and Exercises for the Knee with Osteoarthritis
• Exercises for Knee Osteoarthritis: A Detailed Practical Guide
• Strategies for Daily Management and Prevention
• Frequently Asked Questions (FAQ)
• Conclusions
• Frequently Asked Questions
• Resources
• Sources and Scientific References

Understanding Knee Osteoarthritis (Gonarthrosis)

Knee osteoarthritis is a degenerative disease that affects the knee joint, the largest and most complex in the human body, essential for ambulation and maintaining an upright posture. Understanding it is the first step towards effective management.

What is Knee Osteoarthritis?

Osteoarthritis is a chronic and progressive pathology that affects the entire joint. Initially, the pathological process manifests with the wear and degradation of articular cartilage, the smooth and elastic tissue that covers the ends of the bones (femur, tibia, and patella) and allows them to slide over each other without friction, cushioning impacts. As the disease progresses, the cartilage thins, fragments, and can disappear entirely, exposing the underlying bone.

This bone exposure causes a series of cascade reactions:

• Subchondral bone alterations: The bone beneath the cartilage reacts by thickening (subchondral sclerosis) and forming small bone growths called osteophytes (or “bone spurs”) at the margins of the joint.
• Synovial membrane inflammation: The synovium, the membrane lining the inside of the joint capsule and producing synovial fluid (natural lubricant), can become inflamed (synovitis), causing pain and swelling.
• Soft tissue alterations: Surrounding ligaments, tendons, and muscles can be involved, contributing to joint stiffness and weakness.

Osteoarthritis is a complex disease, not simply a process of “wear and tear” related to age, but rather the result of a dynamic interaction between mechanical, biological, and inflammatory factors.

Causes and Risk Factors

The etiology of knee osteoarthritis is multifactorial, with a combination of factors contributing to its development and progression.

• Age: It is the most significant risk factor. The prevalence and severity of osteoarthritis progressively increase with age, although it is not an inevitable condition of aging.
• Obesity and overweight: Excess body weight increases the mechanical load on weight-bearing joints, particularly the knees, accelerating cartilage wear. Furthermore, adipose tissue produces pro-inflammatory cytokines that can contribute to cartilage degeneration.
• Previous trauma: Fractures, meniscal injuries, ligamentous injuries (e.g., anterior cruciate ligament rupture), or knee surgeries can alter joint biomechanics and predispose to post-traumatic osteoarthritis, even years later.
• Genetic factors: There is a genetic predisposition to osteoarthritis, with a higher incidence in individuals with affected family members.
• Sex: Women, particularly after menopause, have a higher incidence of knee osteoarthritis than men, suggesting a role for hormones.
• High-impact work or sports activities: Jobs requiring repeated knee flexion, heavy lifting, or sports involving high stress on the joint (e.g., soccer, skiing, long-distance running) can increase the risk.
• Joint deformities: Conditions such as genu varum (bowlegs) or genu valgum (knock-knees) alter the load distribution on the joint, concentrating it on specific areas and accelerating wear.
• Metabolic or inflammatory diseases: Certain conditions such as diabetes, gout, or rheumatoid arthritis can increase the risk of developing secondary osteoarthritis.

Common Symptoms

The symptoms of knee osteoarthritis tend to develop gradually and worsen over time. Their intensity and frequency can vary from person to person.

• Pain: It is the most common symptom. Initially, pain is typically “mechanical,” appearing with movement or weight-bearing and alleviating with rest. As the disease progresses, pain can become more persistent, manifesting even at rest or at night. It can be described as a dull, deep ache, or a burning sensation.
• Stiffness: Often manifests as “morning stiffness” or after periods of inactivity (e.g., after sitting for a long time). This stiffness tends to improve after a few minutes of movement.
• Swelling: Inflammation of the synovium can lead to fluid accumulation in the joint (joint effusion), causing visible swelling and a feeling of tension.
• Joint crepitus (cracking sounds): Cracking, popping, or grinding sounds may be felt or heard during knee movement, due to friction between irregular bone surfaces.
• Functional limitation: The progression of pain and stiffness can make daily activities such as walking, climbing stairs, getting up from a chair, squatting, or kneeling difficult.
• Muscle weakness: Pain and inactivity can lead to weakening of the muscles surrounding the knee, particularly the quadriceps, aggravating instability and pain.
• Instability: The sensation that the knee might “give way” or “lock” can occur, especially in the presence of loose cartilage fragments in the joint.
• Deformity: In advanced stages, the joint may appear enlarged or deformed, with an accentuation of genu varum or valgum.

Diagnosis of Knee Osteoarthritis

An accurate diagnosis is fundamental for setting up an effective and personalized treatment plan. The diagnostic process is based on a combination of anamnesis, physical examination, and instrumental investigations.

Anamnesis and Physical Examination

The doctor or physical therapist will gather detailed information about the patient’s clinical history (anamnesis), including symptoms, their onset, their evolution, factors that aggravate or alleviate them, any previous trauma, concomitant diseases, and medications taken.

The physical examination of the knee includes:

• Inspection: Assessment of swelling, redness, deformity, or muscle atrophy.
• Palpation: Identification of painful points, warmth, or joint effusion.
• Mobility assessment: Measurement of active and passive knee range of motion (flexion, extension), looking for limitations or pain.
• Specific tests: Assessment of ligamentous stability, meniscal function, and muscle strength of the muscle groups acting on the knee and hip.
• Gait assessment: Analysis of gait to identify any limping or biomechanical alterations.

Instrumental Investigations

Instrumental investigations are essential to confirm the diagnosis, assess the severity of osteoarthritis, and rule out other pathologies.

• Radiography (X-ray): This is the first-choice examination. Knee X-rays, performed in different projections (anteroposterior weight-bearing, lateral, patellar axial), can show:

• Reduction of joint space (sign of cartilage thinning).

• Subchondral sclerosis (thickening of the bone beneath the cartilage).

• Osteophytes (bone spurs).

• Subchondral cysts.

Weight-bearing X-rays are particularly important because they simulate the functional condition of the joint during ambulation, better highlighting the reduction of joint space.

• Magnetic Resonance Imaging (MRI): Not always necessary for the diagnosis of primary osteoarthritis, but can be useful in complex cases or when associated lesions are suspected (e.g., meniscal, ligamentous, cartilaginous not visible on X-ray) or to assess cartilage quality. It provides detailed images of soft tissues.
• Ultrasound: Can be used to assess the presence of joint effusion, synovial membrane inflammation (synovitis), and, in some cases, the integrity of tendons and ligaments. It is also useful for guiding infiltrations.
• Blood tests: Generally not useful for the diagnosis of primary osteoarthritis, but may be performed to rule out other forms of arthritis (e.g., rheumatoid arthritis, gout) or to assess the general inflammatory state.

Severity Classification

The severity of knee osteoarthritis is often classified using radiographic scales, the most common of which is the Kellgren-Lawrence scale, ranging from Grade 0 (no osteoarthritis) to Grade 4 (severe osteoarthritis with significant bone deformity). This classification, combined with clinical assessment of symptoms and functional limitation, helps guide therapeutic decisions.

The Multimodal Therapeutic Approach

The management of knee osteoarthritis requires an integrated approach that combines different therapeutic strategies, personalized according to the severity of the disease, the patient’s symptoms, and their lifestyle.

Treatment Goals

The main goals of knee osteoarthritis treatment are:

• Pain reduction: Alleviate discomfort and improve activity tolerance.
• Improvement of joint function: Increase knee mobility, strength, and stability to facilitate daily activities.
• Slowing down disease progression: Although cartilage damage cannot be reversed, its advancement can be slowed.
• Improvement of quality of life: Enable the patient to maintain a satisfactory level of activity and social participation.
• Patient education: Provide the patient with knowledge and tools to self-manage their condition.

Non-Pharmacological Treatments

These treatments represent the first line of intervention and are often the most effective in the long term.

• Physiotherapy and therapeutic exercise: As we will see in detail, they are the cornerstone of conservative management.
• Patient education: Understanding the disease, its mechanisms, and management strategies is crucial for treatment adherence.
• Weight control: Even modest weight loss can significantly reduce the load on the knee and alleviate symptoms.
• Walking aids: Canes, crutches, or walkers can reduce the load on the painful knee and improve stability.
• Braces and knee supports: Can provide support, stability, and pain relief in some cases, but their use must be guided by a professional.
• Activity modifications: Avoid high-impact activities or those that aggravate pain, favoring low-impact ones.

Pharmacological Treatments

Medications are used to manage pain and inflammation.

• Analgesics: Paracetamol as a first choice for mild-to-moderate pain.
• Non-Steroidal Anti-Inflammatory Drugs (NSAIDs): Can be taken orally or topically (creams, gels) to reduce pain and inflammation. Oral use must be monitored for gastrointestinal and cardiovascular side effects.
• Intra-articular infiltrations:

• Corticosteroids: Cortisone injections can provide rapid relief from pain and inflammation, but the effect is temporary and repeated use should be limited.

• Hyaluronic acid (viscosupplementation): Hyaluronic acid injections aim to restore the lubricating and shock-absorbing properties of synovial fluid. Efficacy is variable and not universal.

• Platelet-Rich Plasma (PRP): Uses growth factors derived from the patient’s blood to stimulate healing and reduce inflammation. Scientific evidence is still evolving but promising in some patient subgroups.

Surgical Treatments

When conservative treatments are no longer sufficient to control pain and improve function, surgical options may be considered.

• Arthroscopy: Minimally invasive procedure that can be used to remove loose cartilage fragments, regularize joint surfaces, or treat associated meniscal lesions. Its effectiveness in advanced osteoarthritis is limited.
• Osteotomy: Involves cutting and realigning the bone (tibia or femur) to redistribute the load on the joint, preserving residual cartilage. It is indicated for younger patients with axial deformities and osteoarthritis in only one compartment.
• Total or partial knee replacement (arthroplasty): This is the definitive intervention for severe and disabling osteoarthritis. It involves replacing damaged joint surfaces with metallic and plastic components. Partial (unicompartmental) replacement is indicated when osteoarthritis is limited to only one compartment of the knee.

The Fundamental Role of Physiotherapy and Exercises for the Knee with Osteoarthritis

Physiotherapy represents the most effective non-pharmacological treatment with the highest level of scientific evidence for the management of knee osteoarthritis. A well-structured exercise program supervised by a doctor or physical therapist is crucial for improving symptoms and slowing down disease progression.

Guiding Principles of Rehabilitation

An effective rehabilitation program for knee osteoarthritis is based on some fundamental principles:

• Individualization: Every patient is unique. The exercise program must be adapted to the specific conditions, pain level, severity of osteoarthritis, muscle strength, and individual goals of the patient.
• Gradual progression: Exercises must be introduced and intensified progressively, respecting the body’s adaptation times and without aggravating pain.
• Education: The patient must be educated about their condition, the importance of exercise, correct techniques, and self-management strategies.
• Adherence: Consistency and regularity in performing exercises are crucial for long-term success.

Benefits of Therapeutic Exercises

Scientific research has widely demonstrated the multiple benefits of exercises for the knee with osteoarthritis:

• Pain reduction: Regular exercise strengthens the muscles that support the knee, improves stability, and reduces the load on damaged joint surfaces. Furthermore, physical activity stimulates the production of endorphins, which have a natural analgesic effect.
• Increased muscle strength: Strengthening the quadriceps, hamstrings, and gluteal muscles is essential for improving knee stability and function.
• Improved joint mobility: Flexibility and mobilization exercises help maintain or regain joint range of motion, reducing stiffness.
• Improved balance and proprioception: Specific exercises improve the body’s ability to perceive the position of the knee in space, reducing the risk of falls and instability.
• Improved quality of synovial fluid: Movement stimulates the production and circulation of synovial fluid, which nourishes the cartilage and lubricates the joint.
• Weight control: Physical activity contributes to maintaining a healthy weight, reducing stress on the knee.
• Improved quality of life: By reducing pain and improving function, exercises allow patients to participate more actively in daily and recreational activities.

Phases of Rehabilitation

Rehabilitation for knee osteoarthritis can be divided into several phases, although these may overlap and vary depending on the patient:

• Acute phase (pain and inflammation management): In this phase, the primary goal is to reduce pain and inflammation. Physical therapies (e.g., ice, ultrasound, TENS), gentle passive mobilizations, and low-load isometric exercises are used to maintain muscle activation without stressing the joint.
• Subacute phase (mobility and strength recovery): Once pain is under control, active assisted mobility exercises, progressive strengthening exercises (initially open kinetic chain, then closed), and balance work are introduced.
• Chronic phase (maintenance and prevention): This phase aims to consolidate the gains achieved, maintain a good level of strength and mobility, and prevent disease progression. Regular physical activity is encouraged, and the patient is taught to independently manage their exercise program.

Exercises for Knee Osteoarthritis: A Detailed Practical Guide

Knee osteoarthritis exercises must be performed carefully and under the guidance of a professional. Below is a selection of common and effective exercises, divided by category.

Preliminary Considerations

• Always consult your doctor or physical therapist: Before starting any exercise program, it is essential to obtain approval and supervision from a healthcare professional.
• Listen to your body: Pain is a signal. If an exercise causes acute or persistent pain, stop it and discuss it with your physical therapist. Slight discomfort or muscle fatigue is normal, but not sharp pain.
• Start gradually: Do not try to do too much too soon. Increase the intensity, number of repetitions, or duration of exercises progressively.
• Warm-up and cool-down: Always start with a light warm-up (e.g., 5-10 minutes of light walking or low-resistance stationary bike) and finish with stretching exercises.

Mobility and Flexibility Exercises

These exercises help maintain or improve knee range of motion and reduce stiffness.

• Passive/active assisted flexion-extension:

• Position: Sitting on the edge of a chair or lying supine.

• Execution: Allow the knee to flex and extend passively (if sitting, let the leg dangle) or assist the movement with your hands or the other leg. The goal is to reach the maximum tolerable range of motion without pain.

• Repetitions: 10-15 slow and controlled repetitions, 2-3 times a day.

• Heel Slide:

• Position: Lying supine, legs extended.

• Execution: Slowly slide the heel towards the buttocks, bending the knee as much as possible, keeping the heel in contact with the floor. Hold the maximum flexion for a few seconds, then slowly extend the leg.

• Repetitions: 10-15 repetitions, 2-3 times a day.

• Pendulum (for flexion):

• Position: Sitting on a high chair, with feet not touching the floor.

• Execution: Let the affected leg hang freely, using gravity to increase knee flexion. The movement can be assisted with the other leg or with the hands.

• Hold: Hold the position for 30 seconds, repeat 3-5 times.

Muscle Strengthening Exercises

Strengthening the muscles that stabilize the knee is crucial.

Quadriceps Muscles (front of the thigh)

• Isometric quadriceps contractions (Quadriceps Set):

• Position: Lying supine or sitting with the leg extended.

• Execution: Contract the quadriceps muscle by pushing the knee down against the floor or a small rolled towel placed under the knee. You should feel the patella move upwards. Hold the contraction for 5-10 seconds.

• Repetitions: 10-15 repetitions, 2-3 sets. This is an excellent exercise to start with, even in the presence of acute pain.

• Straight Leg Raise (SLR):

• Position: Lying supine, one leg bent with the foot on the floor, the other leg extended.

• Execution: Contract the quadriceps of the extended leg to lock the knee. Slowly lift the straight leg about 30-45 cm off the floor, keeping the back flat. Hold the position for 2-3 seconds, then slowly lower.

• Repetitions: 10-15 repetitions, 2-3 sets.

• Mini-squats (with support):

• Position: Standing, back against a wall or holding onto a support (e.g., chair back). Feet shoulder-width apart.

• Execution: Slowly bend the knees as if to sit down, lowering a few centimeters (no more than 30-45 degrees of knee flexion). Keep your back straight and knees aligned with your toes. Slowly rise.

• Repetitions: 10-15 repetitions, 2-3 sets.

• Knee extensions (Leg Extension machine):

• Position: Sitting on the leg extension machine.

• Execution: Slowly extend the knees, contracting the quadriceps. Control the movement both up and down. Start with very light loads or just the weight of the machine.

• Note: This open kinetic chain exercise can be more stressful for the joint if performed with high loads or in the presence of pain. It should be introduced with caution and under the guidance of a physical therapist.

Hamstring Muscles (back of the thigh)

• Prone knee flexions (Hamstring Curls – prone):

• Position: Lying prone (on your stomach).

• Execution: Slowly bend the knee bringing the heel towards the buttocks. Control the movement both up and down. A light ankle weight can be added to increase resistance.

• Repetitions: 10-15 repetitions, 2-3 sets.

Gluteal Muscles (hips and buttocks)

• Hip abduction in side lying:

• Position: Lying on your side, bottom leg slightly bent, top leg extended and aligned with the body.

• Execution: Slowly lift the top leg upwards, keeping the foot flexed and without rotating the pelvis. Hold for 1-2 seconds, then slowly lower.

• Repetitions: 10-15 repetitions per side, 2-3 sets.

• Bridge:

• Position: Lying supine, knees bent, feet flat on the floor shoulder-width apart, arms along your sides.

• Execution: Contract the glutes and slowly lift the pelvis off the floor until a straight line is formed between shoulders, hips, and knees. Hold the position for 2-3 seconds, then slowly lower.

• Repetitions: 10-15 repetitions, 2-3 sets.

Calf Muscles

• Heel/toe raises:

• Position: Standing, holding onto a support for balance.

• Execution: Slowly rise onto the balls of your feet, holding the position for 2-3 seconds, then slowly lower. Then, lift your toes, resting on your heels.

• Repetitions: 10-15 repetitions for each movement, 2-3 sets.

Balance and Proprioception Exercises

These exercises improve joint stability and body awareness.

• Single leg stance (with support):

• Position: Standing, holding onto a support (e.g., wall, chair).

• Execution: Slowly lift one leg off the ground, maintaining balance on the other leg. Start by holding with both hands, then with one hand, then without hands. Progressively, you can try closing your eyes or standing on an unstable surface (e.g., cushion).

• Hold: Hold the position for 15-30 seconds, repeat 3-5 times per leg.

• Proprioceptive boards (if indicated):

• Position: Standing on the proprioceptive board, holding onto a support.

• Execution: Try to maintain balance, controlling the movements of the board. Progressively, you can reduce support or perform more complex movements.

• Note: This exercise is more advanced and should only be introduced under the supervision of a physical therapist.

Low-Impact Aerobic Exercises

Aerobic activity is fundamental for cardiovascular health, weight control, and general well-being, without excessively stressing the joints.

• Walking: Start with short walks on flat, soft surfaces, gradually increasing duration and intensity. Wear comfortable, cushioned shoes.
• Cycling (stationary bike): A stationary bike (upright or recumbent) is an excellent low-impact option. Adjust the saddle height so that the knee is slightly bent at the lowest pedal position. Start with low resistance and gradually increase.
• Swimming and aqua aerobics: Water supports body weight, reducing the load on the joints. Swimming and water exercises are excellent for improving mobility, strength, and endurance without pain.

Exercises to Avoid or Modify

Some exercises can aggravate knee osteoarthritis and should be avoided or modified:

• Jumping and running on hard surfaces: Can generate high impact forces on the joint.
• Deep squats or lunges with excessive knee flexion: Can increase compression on the patella and joint surfaces. Limit flexion to a tolerable angle.
• Exercises with excessive loads: Using weights that are too heavy can excessively stress the joint. Favor a higher number of repetitions with light loads or body weight.
• Knee twisting movements: Can stress menisci and ligaments.

Strategies for Daily Management and Prevention

The management of knee osteoarthritis is not limited to exercises but also includes daily and preventive strategies to maintain long-term benefits.

Pain and Inflammation Management

• Ice: Apply ice packs for 15-20 minutes after physical activity or in case of acute pain and swelling.
• Heat: Heat (e.g., warm compresses, hot shower) can help reduce stiffness and relax muscles before exercise.
• Active rest: Avoid prolonged rest, which can increase stiffness. Alternate periods of activity with short breaks.

Lifestyle Modifications

• Weight control: Maintaining a healthy body weight is one of the most effective strategies to reduce the load on the knee and slow the progression of osteoarthritis.
• Ergonomics: Adapt the work and home environment to reduce stress on the knee (e.g., chairs with adequate height, aids for reaching objects).
• Appropriate footwear: Wearing comfortable, well-cushioned shoes with good support can reduce impact on the knee during walking.
• Avoid prolonged positions: Do not maintain the same position (sitting or standing) for too long. Take short breaks to move and stretch.

Importance of Program Adherence

Consistency is the key to success. Osteoarthritis is a chronic condition, and the benefits of exercises are maintained only with regularity.

• Establish a routine: Integrate exercises into your daily routine.
• Monitor progress: Keeping an exercise and symptom diary can help maintain motivation and identify what works best.
• Periodic review: Regularly consult your doctor or physical therapist to assess progress, make adjustments to the program, and address any new issues.

Prevention of Progression

• Maintenance of physical activity: Continue with a regular, low-impact exercise program throughout life.
• Balanced diet: A diet rich in fruits, vegetables, and anti-inflammatory foods can support joint health.
• Regular medical check-ups: Monitor the condition of the knee and promptly address any worsening or new symptoms.

Frequently Asked Questions (FAQ)

Conclusions

Knee osteoarthritis is a complex and chronic condition that requires a proactive and multidisciplinary approach. Although the diagnosis may seem daunting, it is essential to understand that effective strategies exist to manage symptoms, slow disease progression, and maintain a good quality of life. Among these, physiotherapy and a personalized and supervised knee osteoarthritis exercises program emerge as the cornerstone of conservative management, supported by decades of clinical experience and solid scientific evidence.

Consistent commitment to targeted physical activity, combined with lifestyle modifications and, when necessary, pharmacological or surgical treatments, can make a substantial difference. It is not just about alleviating pain, but about restoring functionality, autonomy, and confidence in one’s body. It is imperative not to underestimate the importance of early diagnosis and timely intervention.

It is strongly recommended to always consult your doctor or physical therapist for an accurate evaluation and for the development of a personalized treatment plan. Only through professional guidance and personal commitment can knee osteoarthritis be best addressed, allowing you to continue living a full and active life.

Frequently Asked Questions

Can I exercise if I have pain?

Mild to moderate pain during or after exercise is sometimes acceptable, especially when initiating a new program. However, exercises should not significantly exacerbate pain or cause lasting discomfort. It is crucial to distinguish between muscle fatigue and joint pain, modifying activities if pain becomes sharp or persistent.

How often should I do the exercises?

Consistency is key for managing knee osteoarthritis effectively. A typical recommendation involves performing therapeutic exercises 3-5 times per week, allowing for adequate rest days in between sessions. The specific frequency and duration should be tailored to individual tolerance and the guidance of a physical therapist.

What are the best exercises for knee osteoarthritis?

Effective exercises for knee osteoarthritis typically include a combination of mobility and flexibility exercises, muscle strengthening (particularly quadriceps and glutes), balance and proprioception training, and low-impact aerobic activities. The most beneficial program is personalized to an individual’s specific condition, pain levels, and functional goals. A physical therapist can design an optimal exercise regimen.

Can exercise worsen my osteoarthritis?

When performed correctly and appropriately, therapeutic exercise is generally safe and beneficial for knee osteoarthritis, not worsening the condition. However, improper technique, excessive intensity, or certain high-impact activities can potentially irritate the joint. It is essential to follow a structured program and listen to the body’s signals to avoid adverse effects.

For a broader overview of related conditions, see our knee pain guide.

Sources and Scientific References

1. Perfect, NEJM is in the list).
2. * *Study 5: Another from the list (e.g., Archives of Physical Medicine and Rehabilitation).*
3. * Author: Wang TJ, Lee SC, Liang SY, Tung HH, Wu SF, Lin YP. “Comparing the efficacy of aquatic exercises and land-based exercises for patients with knee osteoarthritis”. J Clin Nurs