Table 1: Characteristics of the participants in each group.

VariablesHC ()CFS ()FM ()

Age (years)34.4 (7.9)34.0 (8.9)38.6 (8.0)
Weight (kg)68.0 (9.8)71.6 (12.9)75.4 (14.3)
Height (cm)167.2 (7.1)169.1 (5.4)168.5 (6.0)
BMI (kg/m2)24.3 (3.5)25.2 (5.1)26.5 (4.5)
Education (years)16.1 (2.3)13.4 (2.5)13.5 (2.2)
Pain levela0.08 (0.28),1 (1.16)3.7 (1.8)
Fatigue levela0.6 (0.8)3 (1.8)3.2 (2.2)
Chalder score5.8 (5.7),25.4 (3.8)21.1 (5)
FIQ56.9 (13)

Data are presented as means (SD). HC: healthy control; CFS: chronic fatigue syndrome; FM: fibromyalgia; FIQ: Fibromyalgia Impact Questionnaire. aLevel of pain and fatigue on the day of testing registered upon arrival to the lab. Significance level 0.05; significance level 0.01.