Bone health in children and adolescents with juvenile idiopathic arthritis and the influence of short-term physical exercise.

Purpose:To study bone mineral density (BMD) in 54 children and adolescents with juvenile idiopathic arthritis before and after a short-term exercise program.Methods:Fifty-four children, 41 girls and 13 boys, median age 13.9 years, participated in a 12-week exercise program, with 33 children in an ex