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Table 3 Mean values ( ± SD) of mechanical and EMG variables during voluntary contractions at 60%

From: Central motor control failure in fibromyalgia: a surface electromyography study

 

MCG

FM

p level

MVC (Nm)

18.16 ± 7.89

14.97 ± 6.73

NS

CV initial values (m/s)

4.37 ± 0.34

4.58 ± 0.49

NS

CV rate of change (m/s2)

-0.01 ± 0.01

-0.01 ± 0.01

NS

CV norm. rate of change (%/s)

-0.25 ± 0.33

-0.19 ± 0.19

NS

MNF initial values (Hz)

93.00 ± 14.58

87.21 ± 25.35

NS

MNF rate of change (Hz/s)

-0.59 ± 0.29

-0.25 ± 0.14

0.036

MNF norm. rate of change (%/s)

-0.66 ± 0.34

-0.29 ± 0.16

0.046

ARV initial values (μV)

93.40 ± 46.03

77.84 ± 54.02

NS

ARV rate of change (μV/s)

1.29 ± 1.47

0.68 ± 0.66

NS

ARV norm. rate of change (%/s)

1.23 ± 1.24

0.74 ± 0.41

NS

  1. Mean values ( ± SD) of mechanical and EMG variables during voluntary contractions at 60% MVC in the two groups. The results of the non parametric Mann-Whitney U test (in bold those significant) are reported.
  2. MCG = Matched Control Group, FM = Fibromyalgic Group, MVC = maximal voluntary contraction, CV = conduction velocity, MNF = mean spectral frequency, ARV = average rectified value; NS = non significative