Simple tips to prevent stiffness from prolonged AC exposure

Sitting in air-conditioned spaces for long hours does not directly cause arthritis or bone damage, according to Bharat S. Mody, Chairman and Chief Orthopaedic Surgeon at Welcare Hospital.

However, Mody explained that the sedentary habits associated with prolonged AC exposure can worsen stiffness and muscle discomfort. Many people now spend long hours in artificially cooled spaces, whether at offices, homes or gyms, and often report stiff knees, tight necks, aching backs or general muscle discomfort.

Is AC to blame?

According to Mody, the issue is not the air conditioner itself, but how it affects behaviour. He said: "Air conditioning does not directly cause arthritis and bone degeneration. But prolonged sedentary indoor habits associated with excessive AC exposure seem to have worsened stiffness and muscle discomfort amongst individuals."

In air-conditioned spaces, people often end up sitting for eight to ten hours in relaxed or poor postures. This can slowly trigger stiffness, muscle tightness and joint discomfort.

Why older people feel more pain in AC rooms

Mody explained that ageing muscles and joints are naturally less resilient. Reduced muscle mass, poorer circulation and underlying degenerative joint conditions make it harder for older people to tolerate temperature variations.

Why joints feel stiff in cold environments

There is a scientific reason joints may be more vulnerable in cold indoor spaces, particularly for those with existing joint problems. The surgeon explained that people may experience temporary tightening of the muscles, reduced flexibility and slower circulation.

This effect is more noticeable in people who already suffer from joint or pain-related conditions. Mody said: "People with osteoarthritis, cervical spondylosis, frozen shoulder, lower back pain or past injuries may experience increased discomfort during prolonged AC exposure."

Does AC affect bones directly?

Mody clarified that air conditioning does not directly weaken bones, cause osteoporosis or damage the skeletal system, as there is no scientific evidence to support this. The real concern is more indirect, linked to deficiencies and lifestyle habits.

During summer, many people spend most of their time indoors, leading to less movement, lower sunlight exposure and sometimes poorer hydration. Mody noted: "Vitamin D deficiency remains highly prevalent among urban Indians who spend long hours indoors and don't get enough sunlight. Vitamin D is essential for healthy bones and calcium absorption; deficits can cause muscle weakness, fatigue, soreness in the bones, and, in severe cases, an increased risk of fracture."

Symptoms people often ignore

Many people ignore early warning signs until they develop into chronic problems. Mody said persistent symptoms should not be dismissed as "just AC discomfort." He highlighted the following signs:

• Continuous neck or back stiffness
• Knee discomfort after sitting for long periods
• Muscle cramps
• Shoulder tightness
• Tingling or numbness in the hands
• Early morning stiffness
• Generalised body aches

Fatigue associated with prolonged indoor work

According to Mody, these symptoms could indicate muscular strain, postural problems, early arthritis or Vitamin D deficiency.

Prevention tips

The good news, according to Mody, is that AC-related stiffness and muscle discomfort can be prevented through simple lifestyle adjustments. These include changes to temperature, seating, hydration and movement.

He shared the following precautionary measures:

1. Keep the AC at a reasonable temperature – Very low temperatures are not necessary. A range of 24 to 26°C is sufficient and better for the body.
2. Avoid direct cold airflow – Avoid sitting directly beneath air conditioning vents for long periods, especially over the neck, knees or back.
3. Keep moving – Regular movement is one of the strongest preventive strategies. Every 30 to 45 minutes when working at a desk, take a few minutes to stand, stretch and walk.
4. Stay hydrated – Air-conditioned spaces are often dry, which can lead to dehydration. Adequate hydration supports muscle and joint function.
5. Use ergonomic seating – Poor posture and prolonged computer use are among the main causes of musculoskeletal pain. Use ergonomic seating that keeps the back straight.
6. Get enough sunlight and exercise – Regular walking, strengthening activities and moderate sun exposure are important for maintaining bone and muscle health.
7. Dress appropriately – Light layering in excessively cold indoor spaces may help those with higher sensitivity.

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.