A SERIES of exercises has been designed to improve joint flexibility in arthritic patients. Arthrobics: Exercises for Coping with Arthritis is a booklet and video describing simple exercises to improve flexibility at the neck, shoulders, elbows, back, hands, knees and feet. Copies at pounds 4.50 are available from Searle Pharmaceuticals, PO Box 53, Lane End Road, High Wycombe, Buckinghamshire HP12 4HL.