International Fitness Scale (IFIS): Construct Validity and Reliability in Women With Fibromyalgia: The al-Andalus Project

摘要

Objectives: To examine the construct validity of the International Fitness Scale (IFIS) (ie, self-reported fitness) against objectively measured physical fitness in women with fibromyalgia and in healthy women; and to study the test-retest reliability of the IFIS in women with fibromyalgia.