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Table 2 Comparison of baseline values for participants in the resistance exercise group who reached exercise loads of 80 % and participants in the resistance exercise group who reached exercise loads up to 60 %

From: Resistance exercise improves muscle strength, health status and pain intensity in fibromyalgia—a randomized controlled trial

  Resistance exercise (experimental)  
  Baseline values of participants reaching loads of 80 % Baseline values of participants reaching loads ≤60 % Comparison of baseline values between groups
(n = 42) (n = 25)
Measures Mean (SD) Mean (SD) P value
Median (min; max) Median (min; max)
Age, years 50.26 (9.65) 51.7 (8.1) 0.68
51 (25; 64) 52 (33; 63)
Symptom duration, years 11.44 (8.31) 10.4 (9.0) 0.47
10 (0; 35) 8 (0; 30)
Tender point count, number 15.57 (1.92) 16.08 (1.91) 0.30
16 (11; 18) 17 (12; 18)
Body mass index 26.75 (4.2) 28.5 (6.7) 0.48
26 (21; 36) 27 (20; 41)
LTPAI, h 4.87 (3.87) 6.9 (5.9) 0.17
4 (0;18) 6 (1;28)
Primary outcome
Isometric knee-extension force, N 347.3 (106.2) 301.2 (110.7) 0.11
344 (114;643) 305 (111;585)
Secondary outcomes
FIQ total score (0-100) 57.3 (12.7) 65.9 (15.8) 0.029
55.2 (31; 81) 64 (40; 95)
Current pain intensity, visual analog scale 49.5 (22.1) 48.8 (27.19) 0.68
54 (12; 89) 50 (5;100)
6MWT, m 573.7 (70.3) 527.7 (75.5) 0.040
570 (376; 766) 548 (360; 655)
Isometric elbow-flexion force, kg 13.1 (5.3) 12.9 (5.7) 0.76
13 (2; 26) 13 (3; 32)
Isometric hand-grip force, N 168.4 (70.4) 150.7 (65.6) 0.30
162 (34; 319) 169 (62; 315)
SF36 PCS, 0–100 31.7 (7.5) 30.3 (8.8) 0.32
31 (12; 49) 30 (18; 49)
SF36 MCS, 0–100 39.8 (11.9) 34.0 (12.1) 0.10
41 (10; 59) 35 (13; 61)
PDI, 0–70 34.3 (11.6) 36.9 (13.4) 0.40
34 (12; 69) 39 (8; 62)
CPAQ total, 0–120 66.0 (14.5) 59.5 (18.0) 0.13
64 (35; 99) 59 (19; 106)
FABQphysical, 0–24 9.0 (5.9) 12.6 (7.1) 0.23
9 (0; 23) 13 (2; 24)
FABQwork, 0–42 16.1 (12.3) 20.0 (13.9) 0.37
14 (0; 42) 21 (0; 39)
  1. 6MWT 6 minute walk test, SF36 PCS Short Form 36 physical component scale, SF36 MCS Short Form 36 mental component scale, CPAQ chronic pain acceptance questionnaire, PDI pain disability index, FABQ fear avoidance beliefs questionnaire