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Table 2 Summary of dependent variables pre and post vibration in each group

From: Mechanisms of quadriceps muscle weakness in knee joint osteoarthritis: the effects of prolonged vibration on torque and muscle activation in osteoarthritic and healthy control subjects

Dependent variable Group Pre vibration Post vibration Change (%)
Quadriceps PT* OA 128 ± 49 124 ± 44 -2.4
  Control 170 ± 59 156 ± 55 -8.2**
Vastus medialis RMS* OA 0.13 ± 0.06 0.13 ± 0.06 1.4
  Control 0.27 ± 0.19 0.24 ± 0.18 -13.3**
Vastus lateralis RMS* OA 0.13 ± 0.06 0.13 ± 0.06 3.9
  Control 0.22 ± 0.13 0.19 ± 0.13 -14.1**
Hamstrings PT OA 48 ± 18 49 ± 16 1.7
  Control 56 ± 19 55 ± 19 -0.4
Semitendinosus RMS OA 0.17 ± 0.09 0.18 ± 0.10 7.1
  Control 0.22 ± 0.12 0.23 ± 0.15 3.8
Biceps femoris RMS OA 0.12 ± 0.10 0.10 ± 0.08 -2.5
  Control 0.16 ± 0.07 0.16 ± 0.07 2.6
  1. Data presented as mean ± standard deviation. OA, osteoarthritis; PT, peak torque (Nm); RMS, root mean square of electromyographic signals. *Significant difference between groups (P < 0.05). **Significant change from zero (P < 0.05).