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Table 3 Correlation coefficients of knee extensor strength and quadriceps femoris size variables with personal best 100-m sprint time in sprinters

From: Relationship of the knee extensor strength but not the quadriceps femoris muscularity with sprint performance in sprinters: a reexamination and extension

  r P value
Knee extensor strength
 Isometric strength −0.076 0.571
 Slow-velocity isokinetic strength −0.236 0.075
 Fast-velocity isokinetic strength −0.477 < 0.001
Quadriceps femoris size
 Proximal CSA 0.010 0.942
 Middle CSA −0.226 0.088
 Distal CSA −0.160 0.230
 MV −0.118 0.378
Knee extensor strength/body mass
 Isometric strength 0.083 0.534
 Slow-velocity isokinetic strength −0.129 0.335
 Fast-velocity isokinetic strength −0.409 0.001
Quadriceps femoris size/body mass
 Proximal CSA 0.164 0.219
 Middle CSA −0.065 0.629
 Distal CSA 0.007 0.956
 MV 0.162 0.224
Knee extensor strength/quadriceps femoris MV
 Isometric strength −0.007 0.960
 Slow-velocity isokinetic strength −0.186 0.161
 Fast-velocity isokinetic strength −0.441 0.001
  1. CSA cross-sectional area, MV muscle volume