For years, clinicians and patients alike believed that the higher bone density often observed in osteoarthritis (OA) patients offered a natural shield against osteoporosis (OP). It seemed logical—denser bones should mean stronger bones, right? But recent research has shattered this myth. OA and OP frequently coexist, creating a hidden risk for fractures and long-term disability. High bone mass doesn't always equal bone strength; sometimes, it masks fragility.
The Overlap Between OA and OP
OA and OP are two of the most common musculoskeletal disorders worldwide:
- Osteoarthritis affects over 528 million people globally, making it the leading cause of disability in older adults.
- Osteoporosis impacts 200 million people worldwide, with one in three women and one in five men over 50 experiencing an osteoporotic fracture.
When these conditions occur together, the consequences can be severe—reduced mobility, chronic pain, and increased fracture risk. Understanding this overlap is critical for better prevention and treatment strategies.
Why the Misconception Exists
OA patients often show higher bone mineral density (BMD) on scans, which historically led clinicians to assume they were protected from OP. However, bone quality—not just density—determines strength. OA-related changes can make bones brittle despite their density, leaving patients vulnerable to fractures.
Treatment Landscape: What Are Patients Using?
For Osteoarthritis (OA):
- NSAIDs (Nonsteroidal Anti-Inflammatory Drugs): Used by 80% of OA patients for pain relief.
- Topical NSAIDs: Recommended for knee OA; about 40% of patients use them.
- Opioids: Prescribed in severe cases, but less than 10% of OA patients rely on them due to safety concerns.
- Duloxetine: An antidepressant approved for chronic OA pain; used by 15% of patients.
For Osteoporosis (OP):
- Bisphosphonates: First-line therapy, used by 60–70% of OP patients.
- Denosumab: A monoclonal antibody gaining popularity, with usage around 20%.
- SERMs (Selective Estrogen Receptor Modulators): Like raloxifene, prescribed for postmenopausal women (10–15%).
- Anabolic Agents: Such as teriparatide, reserved for severe cases (<5%).
The Cost of Inaction
Fractures caused by OP cost healthcare systems billions annually. In the U.S. alone, osteoporotic fractures account for $57 billion in direct costs each year, and OA-related disability adds another $136 billion in treatment and lost productivity.
What Can Be Done?
- Early Screening: Don't assume OA patients are safe from OP—dual screening is essential.
- Integrated Care: Combining pain management for OA with bone-strengthening strategies for OP.
- Lifestyle Interventions: Weight-bearing exercise, adequate calcium and vitamin D intake, and fall prevention strategies.
Therapist's Recommendations
As a Team of physical therapists treating OA and OP patients every day, our advice is to focus on consistency and mindfulness of proper, safe technique during your recovery. Listen to your body, work as closely as possible with your specially trained therapist, progress gradually, and prioritize exercises that support strength, mobility, and pain-free movement.
In addition, carefully plan your transition to independent exercise with the goal of avoiding setbacks. If symptoms persist or worsen, consult a licensed professional to ensure your rehabilitation stays on track.
Want to learn more about how Orthopaedic Team Rehabilitation can help you manage your OA and OP together? Schedule an appointment today.
Frequently Asked Questions About Osteoporosis and Physical Therapy
Physical therapy programs are individualized and based on a professional assessment of strength, mobility, balance, pain levels, injury history, and functional limitations. Therapists also focus on safety, progression, and fall risk reduction.
Yes. Physical therapy often plays an important role after fractures by helping patients regain strength, mobility, balance, flexibility, and confidence with movement during recovery.
Individuals experiencing joint pain, stiffness, weakness, balance problems, reduced mobility, difficulty walking, posture changes, or a history of falls may benefit from a physical therapy evaluation.
Helpful lifestyle strategies may include maintaining regular physical activity, improving balance and strength, supporting proper nutrition, increasing calcium and vitamin D intake, practicing fall prevention, and avoiding smoking or prolonged inactivity.
Yes. Weight-bearing and resistance exercises may help support bone health, muscle strength, balance, and mobility while reducing the likelihood of falls and fractures when performed appropriately.
Osteoporosis treatment may include bisphosphonates, denosumab, selective estrogen receptor modulators (SERMs), calcium and vitamin D supplementation, and anabolic bone-building medications in more severe cases.
Common osteoarthritis treatments may include NSAIDs, topical anti-inflammatory medications, duloxetine, activity modification, injections, and physical therapy. Severe cases may sometimes require surgical intervention.
Yes. Experts increasingly recommend screening for osteoporosis in OA patients because high bone density does not always rule out bone fragility or fracture risk.
Safe exercises may include weight-bearing activity, resistance training, posture exercises, balance training, stretching, and low-impact strengthening programs. A physical therapist can recommend exercises based on a patient’s mobility, pain levels, and fracture risk.
Yes. Physical therapy can help improve strength, joint mobility, posture, flexibility, balance, and walking mechanics while reducing pain and fall risk. Treatment plans are tailored to protect joints while promoting safe movement and bone health.
Osteoarthritis affects more than 528 million people worldwide and is one of the leading causes of disability among older adults. Osteoporosis affects approximately 200 million people globally, with fractures becoming increasingly common after age 50.
When OA and OP occur together, patients may experience chronic pain, mobility limitations, stiffness, reduced physical activity, loss of independence, and an increased risk of fractures and falls.
Historically, clinicians believed the increased bone mineral density commonly seen in OA patients reduced the likelihood of osteoporosis. However, newer research suggests that denser bones do not always provide better protection against fractures.
Bone strength depends on both bone density and bone quality. In some OA patients, bones may appear denser on scans while still having structural weakness that increases fracture risk.
Yes. Although osteoarthritis (OA) and osteoporosis (OP) were once believed to be separate conditions, research now shows they can coexist. Patients with osteoarthritis may still have weakened or fragile bones despite showing higher bone density on imaging studies.
Individuals experiencing weakness, poor balance, posture changes, difficulty walking, or a history of falls may benefit from a physical therapy evaluation.
Yes. Physical therapy can help patients safely regain strength, mobility, balance, and confidence following fractures or orthopedic injuries related to osteoporosis.
Risk factors include aging, family history, inactivity, smoking, poor nutrition, hormonal changes, and certain medical conditions or medications.
Osteoporosis often develops without symptoms early on. Some people may experience loss of height, changes in posture, back pain, or fractures that occur more easily than expected.
Falls are one of the leading causes of fractures in people with osteoporosis. Balance training can help improve stability, coordination, and confidence during daily movement.
Safe exercises may include walking, strength training, posture exercises, balance training, flexibility work, and low-impact weight-bearing activity. A physical therapist can recommend exercises based on an individual’s condition and risk factors.
Yes. Weight-bearing and resistance exercises may help support bone density, muscle strength, and overall physical function when performed safely and consistently.
Physical therapy helps improve strength, posture, mobility, balance, and coordination while reducing fall risk. A physical therapist can also teach safe movement strategies to help protect fragile bones.
Osteoporosis is a condition that causes bones to become weaker and more fragile over time, increasing the risk of fractures and injuries.
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