Reformer Pilates for Arthritis: Moving Safely When Your Joints Hurt

Important medical notice: this article is for information only and does not replace an assessment by a rheumatologist, orthopaedic surgeon or rehabilitation doctor. Both rheumatoid arthritis and osteoarthritis are chronic diseases with highly variable presentations. Before starting any exercise programme, consult your specialist. If you are on medication or having physiotherapy, tell your instructor all the relevant information so they can adapt the session to your real situation.

When the joints hurt, the natural instinct is to stop moving them. For decades, rest was the standard recommendation for rheumatic diseases. Today we know that, in most cases, this was exactly the opposite of what the body needs. The right kind of movement is part of the treatment, not an obstacle to it. Reformer Pilates, with its adjustable spring-resistance system and its ability to work with the joints unloaded, is one of the most effective therapeutic exercise tools available for people with arthritis or osteoarthritis.

Rheumatoid Arthritis and Osteoarthritis: Not the Same Thing

Before talking about exercise, it helps to clarify the difference between two conditions that are often confused because both cause joint pain.

Osteoarthritis

Osteoarthritis is a degenerative disease of the joint cartilage. Over time (or through mechanical overload, previous injuries or obesity), the cartilage that covers the ends of the bones inside the joint wears away. When that natural cushion disappears, bone rubs against bone, causing pain, short-lived morning stiffness (under 30 minutes) and a progressive loss of range of movement. The most affected joints are the knees, hips, hands and the lumbar and cervical spine. It is the most common rheumatic disease: it affects more than 25% of people over 60 in Spain, according to the Spanish Society of Rheumatology.

Rheumatoid Arthritis

Rheumatoid arthritis is a systemic autoimmune disease. The immune system attacks the synovial tissue (the membrane lining the joints), producing chronic inflammation that, if not controlled, destroys cartilage and bone. Unlike osteoarthritis, rheumatoid arthritis usually affects small joints (hands, wrists, feet) symmetrically, runs in flares and remissions, produces prolonged morning stiffness (more than an hour) and can come with fatigue, low-grade fever and systemic involvement. In Spain it affects around 0.5% of the population, with higher prevalence in women aged 40 to 60.

The distinction matters because the exercise strategies differ. In osteoarthritis, the main goal is to strengthen the muscles that protect the damaged joint and maintain range of movement. In rheumatoid arthritis, you also have to manage the inflammatory flares, which require specific adjustments.

The Rest Paradox: Why Staying Still Makes Things Worse

For years, fear of joint damage led doctors and patients to avoid exercise. The accumulated evidence has completely reversed that position. A sedentary lifestyle in people with arthritis produces:

• Loss of muscle mass around the joint, which increases the direct load on the damaged joint.
• Progressive joint stiffness through lack of synovial lubrication. Synovial fluid spreads better with movement.
• Reduced bone density, especially relevant in rheumatoid arthritis, where the disease itself and corticosteroids promote osteoporosis.
• Increased pain through central sensitisation and loss of the ability to modulate pain.
• Cardiovascular and metabolic deterioration, which in rheumatoid arthritis is already increased by systemic inflammation.

A 2017 Cochrane review on exercise in rheumatoid arthritis (Hurkmans et al.) concluded that moderate-intensity aerobic exercise and strength training are safe, do not increase inflammatory activity and improve functional capacity and quality of life. The question is no longer “whether to move” but “how to move intelligently”.

Why the Reformer Is Especially Suitable for Arthritis

The Reformer is not a conventional exercise machine. It is a training system that lets you adjust every variable of the movement: resistance, range, speed, body position and point of support. This makes it an ideal environment for people with compromised joints.

Low Impact Without Sacrificing Effectiveness

Unlike running, jumping or lifting weights standing up, the Reformer removes joint impact. The carriage glides on rails with minimal friction, and the springs absorb and modulate the load. You can work the strength of the quadriceps, glutes and hip muscles without the knees or hips bearing full body weight.

Unloaded Work: The Supine Position Changes Everything

Many Reformer exercises are done lying on the back (supine) or on the front (prone). Working horizontally drastically reduces the gravitational load on the joints of the lower limbs. For someone with severe knee pain or hip pain, this is the difference between being able to train and not.

Spring Assistance Through Painful Ranges

The Reformer springs do not only add resistance: they can also assist the movement. Set up with assisting springs, the machine can gently take a joint through its range of movement without the student having to strain the surrounding muscles. This lets you maintain joint mobility even in phases when pain would limit active movement.

Finely Adjustable Resistance

On the Reformer at Pinar Pilates, resistance is modified precisely by changing the number and type of springs. For someone with arthritis in the hands, finger grip can be removed entirely by using wrist straps. For someone with severe knee osteoarthritis, resistance can be reduced to the minimum to work coordination without causing compression.

Specific Adaptations for Students with Arthritis

Working with arthritis on the Reformer requires an adaptation protocol that the instructors at Pinar Pilates apply from the first session:

A detailed initial assessment. Before the first class, the instructor needs to know the exact diagnosis, the joints affected, the current level of inflammatory activity, the medication you take and the movements that trigger pain or have been contraindicated. This information is not a formality: it shapes every decision in the programme.

Lighter springs. Work with arthritis usually starts with one or two light-resistance springs. Intensity is increased progressively and always within tolerable pain thresholds (the 3-out-of-10 rule: if pain goes above that level, the exercise is modified).

Reduced range of movement. The aim is not maximum range. Work is done in the pain-free functional range, which is widened gradually as strength and joint mobility improve.

Avoiding positions of extreme joint load. Deep knee flexion (beyond 90 degrees) or spinal hyperextension may be contraindicated depending on the case. On the Reformer this is managed with range stops and footbar modifications.

Longer warm-up and cool-down. Inflamed or damaged joints need more time to “switch on”. Sessions at Pinar Pilates for people with arthritis include a longer gentle joint mobilisation phase than standard.

Groups of 8 people maximum. The small ratio at Pinar Pilates (8 students per class maximum, 40 or more classes a week) lets instructors such as Giuliana Di Giovanni, Gabriela Seminara, Camila T, Montserrat Sierra or Abel Gomez supervise each student’s execution in real time and adjust on the go.

5 Safe Reformer Exercises for Arthritis

These exercises are commonly selected for people with arthritis, but they must always be adapted to the individual condition. No exercise is universally safe or harmful: it depends on the state of each joint.

1. Supine Footwork (Feet on the Bar)

The student lies on their back with the feet on the footbar. They push the carriage away and return with control, working quadriceps, hamstrings and glutes with no vertical load on the knee. The position of the feet (heels, arches, toes) lets you isolate different muscle groups. It is the safest leg-strengthening exercise for knee and hip osteoarthritis because the joint works fully unloaded.

Adaptation: reduce the resistance to one or two light springs. Limit knee flexion to 60-70 degrees if deep flexion is painful.

2. Pelvic Curl

Lying on the back with the feet flat on the footbar, the student articulates the spine vertebra by vertebra from the sacrum to the thoracic area, lifting the pelvis off the carriage. It is a spinal mobility exercise that activates the glutes and hamstrings without compressing the vertebral joints. It improves lubrication of the sacroiliac and lumbar joints.

Adaptation: if there is cervical osteoarthritis, keep the head supported and do not add neck flexion. Reduce the height of the bridge if there is pain in the sacroiliac area.

3. Modified Hundred

The classic Pilates exercise for activating the core. In the arthritis version, the arms can work with the spring straps (assisted resistance) or without them. The legs stay with the feet on the footbar or the knees bent to 90 degrees to protect the lower back. Rhythmic breathing and activation of the transversus abdominis are the main goals.

Adaptation: avoid excessive neck flexion if there is cervical osteoarthritis. Rest the head on the carriage if the neck does not tolerate the flexed position.

4. Seated Arm Springs (Arm Work with Straps)

Seated on the carriage, the student works the arms with the spring straps from the headrest end. It strengthens the muscles of the shoulder, the shoulder blade and the rotator cuff without axial load on the spine. In rheumatoid arthritis affecting the wrists, the straps are adjusted so the grip is with the palm or with the wrist in a neutral position.

Adaptation: start with the lightest spring. In shoulder arthritis flares, work only in the pain-free range (usually below horizontal).

5. Sideline Leg Work

Lying on the side on the carriage with the feet in the straps or on the footbar, the student works abduction, adduction, internal and external hip rotation. It activates the gluteus medius, the tensor fasciae latae and the deep hip rotators with practically no joint load. It is especially useful in hip osteoarthritis, where strengthening the abductors reduces pressure in the hip joint.

Adaptation: use a blanket or pad under the hip for more comfort. Reduce the range of movement if there is impingement or pain at the end of the range.

6. Spine Stretch (Seated)

Seated at the edge of the carriage with the legs extended towards the bar, the student flexes the trunk forward, lengthening the spine. Without springs or with very light springs assisting the movement, this exercise improves spinal flexion mobility and hamstring stretch. For people with the morning stiffness of rheumatoid arthritis, this kind of gentle mobilisation is especially beneficial for reducing stiffness.

Adaptation: bend the knees if the hamstrings or hip osteoarthritis limit full leg extension. Do not force spinal flexion if there is associated osteoporosis.

What the Science Says about Exercise and Arthritis

The scientific evidence supports movement as a therapeutic component in both conditions:

Rheumatoid arthritis. A randomised clinical trial by Knittle et al. (2011), published in Arthritis Care & Research, showed that progressive strength exercise did not increase inflammatory activity (measured by CRP and ESR) in patients with stable rheumatoid arthritis and produced significant improvements in muscle strength and functional capacity. A later meta-analysis by Rausch Osthoff et al. (2018) in the Annals of the Rheumatic Diseases confirmed that aerobic and resistance exercise are safe and improve quality of life without raising inflammatory markers.

Pilates specifically. A study by Küçükçakır et al. (2013), published in Rheumatology International, compared Pilates with home exercise in women with rheumatoid arthritis over 12 weeks. The Pilates group achieved notably greater improvements in balance, functional strength and quality of life. The authors highlighted the safety of the method.

Knee osteoarthritis. A systematic review by Fernandez-Rodriguez et al. (2021) in Plos One analysed 11 studies on Pilates in osteoarthritis and found significant reductions in pain (VAS scale) and improvements in physical function and quality of life compared with control groups. The Reformer, by allowing unloaded work, showed advantages over mat Pilates in cases with severe pain.

When to Train and When to Rest: Managing Flares

This is the question students with rheumatoid arthritis ask most. The answer depends on the intensity of the flare:

Mild flare (joints somewhat inflamed and sore, but functional). Training with modifications is possible. Intensity is reduced, exercises that directly load the inflamed joints are removed and priority is given to breathing work, the core and the unaffected limbs. A gentle session can improve synovial circulation and reduce stiffness.

Moderate or severe flare (very inflamed joints, with local heat, redness or significant functional limitation). Relative rest is indicated. You should not train on joints in an acute flare. This does not mean total immobility: very small-range movements without resistance to maintain circulation may be appropriate, always under the guidance of the doctor and the instructor. Tell your instructor before the class so they can adapt the session or reschedule it if the flare is severe.

General rule. If pain during exercise goes above 3 out of 10 on the numerical scale, or if post-exercise pain (in the following 24 hours) is clearly greater than before training, the load was excessive. It is adjusted in the next session.

For more context on situations where Reformer Pilates requires special precautions, the article on contraindications of Reformer Pilates offers a detailed guide.

The Long-Term Benefits You Can Expect

If you train regularly with the right adaptations, the documented benefits include:

Less joint pain and morning stiffness. Better strength in the muscles around the joint, which act as the joint’s natural shock absorber. Maintenance or increase of functional range of movement. Better balance and proprioception, which reduces the risk of falls (especially relevant in people with severe arthritis or on corticosteroid treatment, which increases fracture risk). Better mood and less chronic fatigue, very common symptoms in rheumatoid arthritis. These changes do not happen overnight. Most studies observe significant improvements from 8-12 weeks of regular practice.

You can read more about the full range of benefits of Reformer Pilates documented by scientific research.

Frequently Asked Questions about Reformer Pilates and Arthritis

Can I start Reformer Pilates without having exercised before?

Yes. The Reformer is especially suitable for sedentary people or people with low fitness because the resistance starts at very low levels and progresses slowly. The starting point is adapted to what your body can do today, not to a general standard. If you are a beginner, the article on the first Reformer Pilates class in Madrid explains what to expect.

Can Reformer Pilates make rheumatoid arthritis worse?

When exercise is correctly adapted and the student trains outside acute flares, the evidence indicates that it does not increase inflammation or joint damage. The risk appears when training without adaptations, on joints in an active flare or with excessive loads. That is why supervision by an instructor who knows your diagnosis is key.

How many sessions a week are advisable for someone with arthritis?

Most research protocols use 2-3 sessions a week. To start, 2 sessions a week let you assess how your body responds and adjust the progression. Over time, many students reach 3 sessions without problems. Pinar Pilates offers more than 40 classes a week, which gives plenty of flexibility to spread sessions according to how you feel each week.

Is Reformer Pilates suitable for arthritis in the hands?

Yes, with adaptations. Exercises that require finger grip are modified using wrist straps or adapters that let you work with the palm of the hand. Arthritis in the hands does not prevent you from working the core, the legs, the hips or the spine, which is where most of the work on the Reformer is focused.

How long before I notice improvements?

Stiffness and pain usually improve first: many students notice a difference in the first 4-6 weeks. Changes in strength and range of movement are more gradual and consolidate between weeks 8 and 12. Consistency is the decisive factor: the results of one session are temporary; those of a continued programme are lasting.

Living with arthritis does not mean giving up movement. It means finding the right way to move, with the support of instructors who understand your condition and a setting designed to adapt to you. At Pinar Pilates we regularly work with students who have knee, hip or spinal osteoarthritis, and with people being treated for rheumatoid arthritis. The adaptation protocol, the maximum ratio of 8 students per class and the experience of our team of instructors are the basis of a programme that can accompany you for years.

If you are unsure whether Reformer Pilates is right for your case, you can call us on +34 611 994 729 and talk to the team before booking. We are at Calle del Pinar 8, in the Salamanca district, Madrid.

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