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Table 1 MVIC peak torque and surface EMG amplitudes. (Mean (± SD, 95% CI)) at PRE, POST (n: 16), 1H and 48H (n: 12) for STIM, STIM + Vib and Vib conditions

From: Effect of tendon vibration during wide-pulse neuromuscular electrical stimulation (NMES) on the decline and recovery of muscle force

Measure PRE POST 1H 48H
Mean ± SD 95% CI Mean ± SD 95% CI Mean ± SD 95% CI Mean ± SD 95% CI
MVIC PT (N)
 STIM 237.8 ± 90.2 189.7–285.8 219.1 ± 90.0* 171.1–267.0 216 ± 72.0* 170.1–261.4 228.7 ± 72.2 182.8–274.6
 STIM + Vib 229.3 ± 82.0 185.6–273.0 222.9 ± 84.8 177.7–268.0 222.1 ± 77.3 173.0–271.3 233.4 ± 67.2 190.6–276.0
 Vib 214.2 ± 63.4 174.0–254.5 212 .8 ± 59.0 175.4–250.5 224.6 ± 73.8 177.7–271.5 230.5 ± 68.1 187.2–273.8
QUAD EMG (mV)
 STIM 1.27 ± 0.60 0.94–1.61 1.14 ± 0.48 0.88–1.40 1.20 ± 0.53 0.90–1.51 1.19 ± 0.48 0.85–1.52
 STIM + Vib 1.32 ± 0.51 1.05–1.60 1.29 ± 0.52 1.01–1.56 1.38 ± 0.54 1.03–1.72 1.4 ± 0.49 1.09–1.71
 Vib 1.14 ± 0.62 0.75–1.54 1.16 ± 0.60 0.78–1.54 1.16 ± 0.52 0.83–1.50 1.23 ± 0.64 0.82–1.63
RF EMG (mV)
 STIM 0.39 ± 0.16 0.30–0.48 0.32 ± 0.14 * 0.25–0.40 0.35 ± 0.19 0.23–0.47 0.33 ± 0.17 0.22–0.44
 STIM + Vib 0.38 ± 0.17 0.29–0.47 0.38 ± 0.19 0.28–0.49 0.39 ± 0.23 0.25–0.53 0.39 ± 0.15 0.29–0.48
 Vib 0.32 ± 0.2 0.20–0.45 0.33 ± 0.19 0.21–0.45 0.33 ± 0.17 0.22–0.44 0.37 ± 0.22 0.23–0.51
VM EMG (mV)
 STIM 0.50 ± 0.44 0.27–0.74 0.48 ± 0.38 0.28–0.68 0.51 ± 0.39 0.26–0.76 0.52 ± 0.37 0.28–0.75
 STIM + Vib 0.47 ± 0.33 0.29–0.64 0.46 ± 0.34 0.28–0.64 0.51 ± 0.38 0.27–0.75 0.61 ± 0.43 0.34–0.88
 Vib 0.35 ± 0.34 0.14–0.57 0.35 ± 0.33 0.14–0.56 0.34 ± 0.30 0.15–0.53 0.34 ± 0.33 0.13–0.56
VL EMG (mV)
 STIM 0.38 ± 0.22 0.26–0.50 0.33 ± 0.19 0.23–0.43 0.34 ± 0.24 0.19–0.50 0.35 ± 0.30 0.16–0.54
 STIM + Vib 0.48 ± 0.30 0.32–0.64 0.45 ± 0.28 0.30–0.60 0.47 ± 0.36 0.24–0.70 0.40 ± 0.27 0.23–0.57
 Vib 0.46 ± 0.37 0.23–0.69 0.48 ± 0.38 0.24–0.72 0.49 ± 0.36 0.26–0.72 0.51 ± 0.42 0.25–0.78
% from PRE (baseline MVIC PT)
 STIM -8.72 ± 5.79 * −11.80 - 5.64 −6.79 ± 7.26 −11.40 - 2.17 −0.67 ± 11.39 −7.91 - 6.57
 STIM + Vib −3.28 ± 6.44 −6.71 - 0.15 −1.61 ± 6.61 −5.80 - 2.59 4.52 ± 4.86 1.43–7.60
 Vib 0.05 ± 5.76 −3.61- 3.71 4.42 ± 11.61 −2.95 - 11.80 7.93 ± 12.56 −0.06 -15.91
  1. MVI maximal voluntary isometric contraction, PT peak torque, VM vastus medialis muscle, VL vastus lateralis muscle, RF rectus femoris muscle, EMG RMS root mean square EMG amplitude, SD standard deviation, 95% CI 95% Confidence Interval
  2. *Significant difference from PRE (P <0.05)