Does air conditioning or cold weather make a knee stiffer?

What cold does, and does not do

In Qatar, people spend much of the summer in strongly air-conditioned homes, offices, malls and cars. Many notice their knees feel stiffer there. Cold makes muscles and soft tissues a little less supple, and some people with arthritis are sensitive to temperature and weather changes, possibly through nerve sensitivity in the joint.

What cold does not do is wear out cartilage or cause arthritis. The air conditioning is not the cause of the knee problem; it can make an existing problem more noticeable.

What usually drives the stiffness

• Long periods of sitting still, which let the joint gel
• Reduced walking in the hot months, so muscles weaken
• An existing condition such as osteoarthritis or a past injury
• Swelling in the joint from a meniscus or cartilage problem
• Sitting with the knee bent, for example at a desk or in the car

Simple ways to stay comfortable

Keep the knee covered with light clothing or a blanket if the air conditioning blows directly onto it, and avoid sitting under the vent. Get up and move every 30 to 45 minutes. A warm shower or a warm pack in the morning can loosen the knee before activity.

Keep up regular exercise through the summer indoors: a stationary bike, a swimming pool, or walking in an air-conditioned mall. Strength and movement do more for stiffness than any change in temperature.

When stiffness is not about the weather

Book an assessment if stiffness lasts more than half an hour each morning, the knee swells, catches or locks, or it is getting steadily worse. Seek urgent care for a hot, red, swollen knee or fever.

At Aman Hospital in Doha, Dr. Gelber examines the knee and arranges X-rays when arthritis is suspected, so that treatment targets the real cause rather than the thermostat.