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

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

	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

ISSN: 2052-1847