Women who wear high heels or badly-fitting trainers could be putting themselves at risk of arthritis, experts have warned.
The British Society of Chiropodists and Podiatrists are predicting an "arthritis crisis" due to levels of obesity, people living longer and poor footwear.
The most common form of the condition, osteoarthritis, causes pain and stiffness in the joints.
It can result from injury or general wear and tear on the joint and the condition is more common in women. A quarter of women wear high heels every day, a poll for the Society of Chiropodists and Podiatrists found.
But experts warned that high heels can alter the body's posture and increase pressure on the foot, ankle and knee joints, increasing the risk of osteoarthritis.
The poll also found that 77% of men and women do not wear shoes designed specifically for the sport they are doing. This can cause stress on the joints, increasing the risk of the condition.