Thirty adolescents (15 female) with familial Mediterranean fever (FMF) were evaluated regarding disease severity, lower extremity muscle strength, lower extremity functional capacity (6-minute walking distance, 10-time sit-to-stand test, and 9-step stair climb test), and disease-related quality of life. Physical activity (PA) was calculated over 2 weekdays and 2 weekend days with a tri-axial accelerometer (ActiGraph wGT3X-BT). None of the participants fulfilled the PA recommendations for all 4 measured days. No effect of sex, presence of exertional leg pain, or days of the week was determined on PA (P > .05). Poor negative correlations were detected between total number of steps and disease duration (rs = −0.385, P = .036), total number of steps and 9-step stair climb test (rs = −0.406, P = .026), and total light PA time and disease duration (rs = −0.409, P = .025). Our results suggest that adolescents with FMF do not achieve the recommended daily PA.
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