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Table 1 Descriptive measures from pre- to post-fatigue for maximum voluntary contraction (MVC), motor unit activation (MUA), and doublet twitch amplitude. Values are mean (standard deviation) for both genders and muscle groups. Time is measured in minutes, and corresponds to the duration after the tenth fatiguing contraction was performed that the measure was taken.

From: Sex differences in the rate of fatigue development and recovery

   Elbow Flexors Knee Extensors
Variable Time Female Male Female Male
MVC (N) Pre* 197.4(31.5) 364.6(64.9) 438.9(70.1) 677.4(102.4)
  0* 158.6(38.4) 262.2(60.8) 379.3(60.9) 487.9(86.2)
  15* 154.6(59.2) 311.9(80.3) 392.9(85.7) 517.7(90.2)
  30* 174.3(36.9) 317.7(81.3) 406.9(79.7) 543.4(81.5)
  45* 185.6(36.9) 324.6(55.8) 406.4(92.3) 553.7(70.8)
MUA (%) Pre 93.6(3.3) 94.9(3.9) 86.2(10.8) 91.3(6.6)
  0 85.1(11.8) 86.6(7.8) 89.8(4.7) 84.3(6.7)
  15 84.2(10.5) 91.4(5.9) 89.6(6.5) 86.1(10.6)
  30 90.4(5.9) 91.5(7.7) 89.8(6.1) 85.8(9.8)
  45 91.3(3.4) 91.5(4.5) 88.4(8.6) 87.8(8.7)
Twitch (N) Pre* 25.3(9.8) 70.4(22.0) 207.3(32.9) 310.0(73.4)
  0 21.3(18.6) 34.3(21.8) 140.9(27.9) 132.4(37.3)
  15 13.8(11.4) 41.2(21.9) 135.9(24.8) 158.8(70.6)
  30* 17.0(10.9) 40.1(21.3) 150.6(26.6) 202.5(36.8)
  45* 18.0(8.9) 38.1(20.5) 154.9(24.8) 205.2(30.7)
  1. * Indicates significant difference (P < 0.05) between genders when muscles are grouped.