stiffness

Osteoarthritis, a degenerative joint disease that causes pain and stiffness, typically affects older people, but can strike at any age.

Tightness and stiffness in the ankles, calves and toes are also common.

Symptoms can include slow movements along with stiffness, walking and balance issues and/or tremor.

Murray was due to play alongside Raducanu during his final outing at the All England Club before his fellow Briton pulled out of the mixed doubles because of "some stiffness" in her right wrist.

The youngsters are fed every two hours and require regular muscular massages to prevent stiffness.