When most people think about osteoarthritis, they think about cartilage, inflammation, exercise, strength, or what shows up on an X-ray. Few people think about mindset. That may be because mindset sounds less important than something we can see on an MRI or measure with a blood test. Yet over the last two decades, researchers have uncovered something remarkable:

The way we think about our health can influence how we experience it. Not because osteoarthritis is imaginary. Not because positive thinking cures disease. But because our expectations influence our behaviors, stress responses, physiology, and experiences in powerful ways. This growing field of research is known as mindset science, and it may have important implications for people living with osteoarthritis.

What Exactly Is a Mindset?

Stanford psychologist Alia Crum defines mindsets as:

“Core assumptions about the nature of something.”

In other words, mindsets are the beliefs and expectations that help us make sense of our experiences. They influence:

• What we pay attention to
• What we expect to happen
• How we interpret challenges
• How we respond to setbacks
• Which actions we take

Importantly, mindsets often operate in the background. Most people don’t consciously decide what they believe about arthritis. Instead, those beliefs gradually develop from conversations with clinicians, media messages, imaging results, personal experiences, and stories they’ve heard from family and friends. Over time, these beliefs become the lens through which they view their condition.

The Hotel Housekeeper Study

One of the most interesting studies in mindset research involved hotel housekeepers.

Researchers discovered that many housekeepers were physically active enough during their jobs to meet public health exercise recommendations. However, most of them did not consider themselves exercisers. The researchers then told one group of housekeepers that the work they were already doing counted as meaningful exercise and explained the health benefits associated with those activities.

Nothing about their jobs changed. They cleaned the same rooms. Walked the same hallways. Performed the same physical tasks.

But several weeks later, the group that learned their work qualified as exercise showed improvements in weight, body fat percentage, blood pressure, and other health measures compared to a control group. The activity was identical, the mindset was different.

(Crum & Langer, Psychological Science, 2007)

The Milkshake Study

In another fascinating study, researchers gave participants the exact same milkshake on two separate occasions. In one visit, participants were told they were drinking an indulgent, high-calorie milkshake. On the other visit, they were told they were drinking a sensible, low-calorie health shake.

In reality, the milkshake was identical. Yet participants showed different hormonal responses depending on what they believed they were consuming. Their bodies responded differently based on their expectations. Again, the physical experience was the same, but the mindset was different.

(Crum et al., Health Psychology, 2011)

The Stress Mindset Studies

Most of us have been taught that stress is harmful. And certainly, chronic or overwhelming stress can negatively affect health. But Alia Crum’s research found something interesting: people who viewed stress as something that could be enhancing rather than purely debilitating often demonstrated healthier physiological responses under pressure.

This doesn’t mean stress is always good. It means that how we interpret stress can influence how we experience it. The belief itself matters.

(Crum, Salovey, & Achor, Journal of Personality and Social Psychology, 2013)

What Does Any of This Have to Do With Osteoarthritis?

Quite a lot.

People with osteoarthritis are constantly exposed to messages about what their condition means. Many hear phrases such as:

• “Wear and tear”
• “Bone-on-bone”
• “Degeneration”
• “Your knee is worn out”
• “It’s just part of getting older”

These messages don’t simply provide information. They shape expectations. And expectations influence behavior.

If someone believes their knee is fragile, they may avoid activity. If someone believes movement causes damage, they may stop exercising. If someone believes surgery is the only solution, they may become discouraged from trying other evidence-based approaches. Over time, these beliefs can shape how people respond to their condition.

Mindsets Influence Behavior

One of the most important lessons from mindset science is that beliefs often influence health indirectly. They influence what we do.

For example:

• If you believe exercise can help osteoarthritis, you’re more likely to stay active.
• If you believe movement is harmful, you’re more likely to avoid it.
• If you believe improvement is possible, you’re more likely to persist when progress is slow.
• If you believe nothing can help, you’re more likely to give up before improvement occurs.

Research consistently shows that physical activity, strengthening, education, sleep, and self-management strategies can improve pain and function in people with osteoarthritis. Yet these treatments only work if people engage with them.

Mindset may influence whether that happens.

In fact, our findings indicate that mindsets are associated with physical activity levels among individuals with knee osteoarthritis. Additionally, Rethink OA can improve mindsets and boost engagement with physical activity and conservative management strategies in under 2 hours.

This Doesn’t Mean Mindset Cures Arthritis

This point is crucial. 

Mindset doesn't regenerate cartilage, eliminate inflammation, or magically cure osteoarthritis. However, it can affect several aspects such as physical activity, confidence, fear of movement, stress responses, treatment adherence, quality of life, and how individuals interpret pain and setbacks. 

These factors matter because they impact daily life and long-term health. In essence, while mindset may not alter the diagnosis itself, it can shape the overall experience.

What About Growth Mindset?

Many people are familiar with the work of psychologist Carol Dweck, who introduced the concept of a growth mindset. A fixed mindset assumes abilities and outcomes are largely predetermined. A growth mindset assumes people can learn, adapt, and improve over time.

In the context of osteoarthritis, a fixed mindset may be expressed as:

“There’s nothing I can do. My knee is only going to get worse.”

An more adaptable perspective might be:

“This is challenging, but I can still take actions to enhance my strength, confidence, and overall quality of life.”

These contrasting beliefs often result in very different behaviors. And such behaviors usually lead to different results.

Why We Care About Mindset at Rethink OA

Mindset became a key focus of the Rethink OA program because our research showed its connection to participation in physical activity and engagement with conservative management strategies. People do not react just to osteoarthritis itself; rather, they respond to their beliefs about what osteoarthritis means. That’s why we promote rethinking common assumptions regarding pain, movement, aging, and joint health. Our aim is not to foster blind optimism but to help individuals develop beliefs that are accurate, empowering, and backed by modern science.

The Bottom Line

Most people associate osteoarthritis primarily with the joint itself. However, mindset science suggests we should also consider individuals' beliefs about that joint. This doesn't mean osteoarthritis is psychological or that positive thinking cures it. Instead, beliefs significantly impact behavior, expectations, confidence, and health experiences.

While mindset isn't the sole factor influencing osteoarthritis, it might be one of the most underappreciated. Unlike many observable features on an X-ray, beliefs are changeable.

FAQ

What is a mindset?

A mindset is a core belief or assumption about the nature of something. In health, mindsets shape how we interpret symptoms, treatment, stress, exercise, and recovery.

Can mindset really affect osteoarthritis?

Mindset does not change the underlying diagnosis of osteoarthritis, but research suggests it can influence behaviors, expectations, stress responses, confidence, physical activity, and quality of life.

Is osteoarthritis pain all in my head?

No. Osteoarthritis is a real physical condition involving changes within the joint. However, pain is influenced by biological, psychological, and social factors working together.

Can changing my mindset cure osteoarthritis?

No. Mindset does not cure osteoarthritis or regrow cartilage. However, it may influence how you respond to the condition and whether you engage in behaviors that support long-term health.

Why do beliefs matter so much?

Beliefs influence behavior. If you believe movement is dangerous, you may avoid activity. If you believe improvement is possible, you may be more willing to stay active, participate in treatment, and persist through setbacks.

What is the difference between this and positive thinking?

Mindset science is not about pretending everything is fine. It is about understanding how expectations influence behavior and health experiences, and adopting beliefs that are realistic, evidence-based, and useful.

About the Author

Melissa Boswell, PhD, is a bioengineer and digital health founder with nearly a decade of experience working in osteoarthritis, movement science, and human performance. She is the founder of Rethink OA, a clinically validated digital program developed from research conducted with collaborators at Stanford University and published in npj Digital Medicine. Her work focuses on helping people better understand pain, movement, and behavior change in osteoarthritis.