The Associations between Pain Sensitivity and Knee Muscle Strength in Healthy Volunteers: A Cross-Sectional Study
Table 1
Demographics of subjects and summaries of pain sensitivity assessments. Data are given as mean, standard deviation (SD), minimum, and maximum unless otherwise indicated.
Mean
(SD)
Min.
Max.
Age, years
26.8
(4.8)
18.8
35.6
Height, cm
170.8
(7.0)
156.0
184.0
Weight, kg
72.9
(11.2)
53.0
98.8
Body mass index, kg/m2
24.9
(3.3)
18.3
32.6
Female/male sex, (%)
21/7
(75/25%)
—
—
Isometric muscle strength
Knee Extension, Nm/kg
2.2
(0.4)
1.4
3.6
Knee Flexion, Nm/kg
1.1
(0.3)
0.7
1.9
PPTCCPA
Vastus Lateralis, kPa
275
(128)
137
804
Deltoideus, kPa
294
(196)
29
765
Infrapatellar fat pad, kPa
402
(186)
137
801
PPTCUFF lower leg, kPa
20.9
(6.6)
10.3
36.7
Experimental pain intensity
Vastus Lateralis, mm
39.6
(24.2)
0.0
100.0
Deltoideus, mm
33.6
(19.5)
0.0
77.0
Infrapatellar fat pad, mm
50.3
(27.3)
0.0
100.0
Experimental pain duration
Vastus Lateralis, s
553.1
(195.9)
0.0
1099.0
Deltoideus, s
462.8
(239.9)
0.0
1100.0
Infrapatellar fat pad, s
727.7
(278.5)
0.0
1200.0
PPTCCPA: pressure pain threshold assessed by computer-controlled pressure algometry; PPTCUFF: pressure pain threshold assessed by computerized cuff algometry.
