Noninvasive optical characterization of muscle blood flow, oxygenation, and metabolism in women with fibromyalgia

Table 1 Subject characteristics

Parameters	Women with fibromyalgia (FM)(n= 14)	Healthy controls(HC) (n= 23)	P-value
Age (years)	60.0 ± 1.8	56.8 ± 1.0	0.09
Height (cm)	162.8 ± 1.5	163.4 ± 1.3	0.75
Weight (kg)	68.5 ± 4.3	69.1 ± 2.0	0.88
Body mass index (kg m^-2)	25.7 ± 1.3	25.9 ± 0.8	0.87
FM duration (year)	13.7 ± 1.9	N/A	N/A
IPAQ (MET minute week^-1)	7574 ± 1882	5928 ± 864	0.37
Baseline MVIC (N m)	113.6 ± 5.3	128.4 ± 5.6	0.08
% Loss in MVIC immediately post-exercise	31.4 ± 1.3	27.4 ± 2.4	0.23
% Loss in MVIC at 12 minutes post-exercise	21.1 ± 2.5	17.5 ± 2.0	0.28
VAS pain score pre-exercise (mm)	52.4 ± 6.5	6.9 ± 2.1	< 0.001
VAS pain score post-exercise (mm)	56.2 ± 7.0	17.4 ± 4.5	< 0.001
VAS pain score after 12 minutes recovery (mm)	53.6 ± 6.7	10.1 ± 3.3	< 0.001
VAS fatigue score post-exercise (mm)	61.0 ± 7.0	22.8 ± 4.2	< 0.001

Results are presented as mean ± standard error. 1 MET (metabolic equivalent of task), 1 kilocalorie kg^-1 hour^-1; IPAQ, International Physical Activity Questionnaire; MVIC, maximal voluntary isometric contraction; VAS, visual analog scale.