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Table 3 Integrated muscle electromyography activity during the single-limb mini squat

From: Hyperalgesia affects muscle activity and knee range of motion during a single-limb mini squat in individuals with knee osteoarthritis: a cross-sectional study

Muscles HG
Mean ± SD
KOAG
Mean ± SD
F p-value
Phase 1 (eccentric contraction)
 Gastrocnemius medialis 0.136 ± 0.062 0.176 ± 0.064 6.526 0.013*
 Erector spinae_R 0.194 ± 0.072 0.210 ± 0.069 0.872 0.354
 Erector spinae_L 0.191 ± 0.048 0.218 ± 0.055 3.799 0.056
 Gluteus medius 0.166 ± 0.062 0.163 ± 0.052 0.003 0.956
 Rectus femoris 0.238 ± 0.069 0.273 ± 0.060 1.791 0.186
 Vastus medialis 0.282 ± 0.053 0.278 ± 0.064 0.388 0.536
 Vastus lateralis 0.925 ± 0.079 0.892 ± 0.130 1.160 0.286
 Tibialis anterior 0.118 ± 0.068 0.165 ± 0.074 5.167 0.027*
 Biceps femoris 0.202 ± 0.070 0.181 ± 0.079 0.239 0.627
Phase 2 (concentric contraction)
 Gastrocnemius medialis 0.070 ± 0.051 0.116 ± 0.059 7.979 0.007*
 Erector spinae _R 0.135 ± 0.054 0.136 ± 0.057 0.581 0.449
 Erector spinae _L 0.256 ± 0.054 0.262 ± 0.045 0.418 0.521
 Gluteus medius 0.130 ± 0.093 0.228 ± 0.113 9.999 0.003*
 Rectus femoris 0.294 ± 0.052 0.302 ± 0.051 0.609 0.438
 Vastus medialis 0.171 ± 0.050 0.184 ± 0.053 0.932 0.338
 Vastus lateralis 0.218 ± 0.094 0.241 ± 0.067 0.527 0.471
 Tibialis anterior 0.183 ± 0.077 0.209 ± 0.076 1.820 0.183
 Biceps femoris 0.111 ± 0.061 0.125 ± 0.072 1.706 0.197
  1. HG Healthy group, KOAG Knee osteoarthritis group, R right, L left. *p-value≤0.05. Covariates appearing in the model are evaluated at the following values: Weight = 73.90