Knee pain in Indian women: why it's so common

Knee osteoarthritis affects women roughly twice as often as men worldwide, but the disparity is even larger in India. Studies estimate that over 30% of Indian women over 50 have symptomatic knee OA, compared to about 15% of men. By age 65, knee pain is one of the leading causes of disability in Indian women.

This is not simply because women live longer. The gender gap in knee OA begins well before old age, with many Indian women reporting knee pain in their late 30s and 40s. Understanding why requires looking at several factors that converge uniquely in Indian women.

India has a paradox: it is one of the sunniest countries in the world, yet it has epidemic levels of vitamin D deficiency. Studies consistently show that 70 to 90% of Indian adults are vitamin D deficient, with women being more severely affected than men. In some studies of Indian women, over 90% were found to have vitamin D levels below the recommended threshold.

Why are Indian women particularly affected? Cultural practices that limit sun exposure (covering arms and legs, staying indoors, limited outdoor physical activity), darker skin pigmentation that requires more sun exposure to produce vitamin D, and vegetarian diets that exclude major dietary sources of vitamin D (fatty fish, egg yolks) all contribute.

Vitamin D is essential for calcium absorption and bone health. Chronic deficiency weakens bones (increasing osteoporosis risk) and may also contribute to muscle weakness and increased pain sensitivity. Weak quadriceps muscles, partly due to vitamin D deficiency affecting muscle function, reduce the support around the knee joint and accelerate cartilage wear.

Getting your vitamin D level tested (a simple blood test, Rs 500 to Rs 1,000) is one of the most important things you can do. If deficient, your doctor will prescribe supplementation. But supplementation alone is not enough. You also need the muscle strengthening that only exercise provides.

Estrogen plays a protective role in joint health. It has anti-inflammatory effects on cartilage and helps maintain bone density. After menopause, the sharp decline in estrogen accelerates cartilage degradation, reduces bone density, and increases joint inflammation. This is why many women notice a significant increase in joint pain around and after menopause.

Hormone replacement therapy (HRT) can help but is not appropriate or desired by everyone. What is universally recommended, regardless of HRT status, is weight-bearing exercise and resistance training. These are the most effective ways to maintain bone density and joint health after menopause.

Indian women's daily activities often involve repetitive, high-load knee positions that Western ergonomic guidelines never consider. Cooking while squatting or sitting on the kitchen floor. Washing clothes by hand in a bent-over or squatting position. Grinding in a traditional posture. Mopping the floor on hands and knees. Drawing rangoli bent forward. These activities involve deep knee flexion, sustained squatting, and repeated transitions between floor and standing.

None of these activities is inherently harmful in a healthy joint. But when combined with weak muscles, vitamin D deficiency, excess body weight, and declining cartilage quality, they place cumulative stress on joints that are already vulnerable. The solution is not to stop these activities but to build the muscular strength and flexibility that allows you to do them safely.

Domestic work also means many Indian women do not have dedicated "exercise time." Their physical activity consists entirely of household work, which, while keeping them moving, does not provide the targeted strengthening that protects joints. Household work exercises endurance but not the specific muscle groups (quadriceps, hip abductors, core) that support knee health.

The standard advice Indian women receive for knee pain is: "Take calcium tablets and drink milk." While calcium is important for bone health, calcium supplementation alone does not prevent or treat knee osteoarthritis. OA is primarily a cartilage and muscle problem, not just a bone problem.

What the evidence actually says works: quadriceps strengthening is the single most effective intervention for knee OA in women. Research consistently shows that strengthening the front-of-thigh muscles reduces knee pain by 30 to 50% over 6 to 8 weeks. This is more effective than any supplement, injection, or medication for mild to moderate OA.

Weight management is the second most impactful factor. For every 1 kg of body weight lost, the load on the knee joint during walking reduces by approximately 4 kg. A 5 kg weight loss reduces knee load by 20 kg per step, which adds up to tonnes of reduced load over the course of a day.

Combining vitamin D supplementation (if deficient), quadriceps strengthening, and weight management addresses the three most modifiable risk factors simultaneously. This is the approach that produces the best outcomes in research.

The following approach, based on what the evidence supports, is what Nuprana's physiotherapists recommend for Indian women with knee pain.

Get your vitamin D level tested and supplement if needed. This is the foundation. Exercise works better when vitamin D levels are adequate because the muscles respond better to strengthening.

Start a structured quadriceps strengthening programme. This does not require a gym. Straight leg raises, wall squats, step-ups, and seated knee extensions can all be done at home with no equipment. Consistency matters more than intensity: 15 minutes daily is more effective than 1 hour twice a week.

Address weight gradually if needed. Crash diets are counterproductive because they lead to muscle loss. A sustained caloric deficit of 300 to 500 calories per day combined with exercise is the sustainable approach.

Nuprana's online physiotherapy is designed specifically for this. Your programme includes an initial assessment, a personalized exercise plan adjusted for your home environment and daily activities, regular online sessions to progress exercises and correct form, and guidance on managing knee-loading activities in your daily routine.