From: Physical activity measures in patients with myalgic encephalomyelitis/chronic fatigue syndrome: correlations between peak oxygen consumption, the physical functioning scale of the SF-36 questionnaire, and the number of steps from an activity meter
Fibromyalgia +
Fibromyalgia −
P-value
Number/percentage
58 (58%)
41 (41%)
Number of steps/day (median/IQR)
4527 (3264–6235)
6401 (3531–8123)
0.14
SF-36 Physical activity
42 (19)
52 (22)
0.02
%peak VO2
74 (19)
80 (16)
0.08