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

Table 5 Stepwise multiple regression analysis for predicting personal best 100-m sprint time in sprinters

Model	Independent variable	Multiple regression equation	R²	Adjusted R²	F value	β	P value
Model 1	Fast-velocity Isokinetic strength (X₁)	Y = 11.929 − 0.006 X₁	0.228	0.214	16.511	−0.477	< 0.001
Model 2	Fast-velocity Isokinetic strength (X₁)	Y = 11.753 − 0.011 X₁ + 0.004 X₂	0.296	0.271	11.569	−0.842	< 0.001
Model 2	Slow-velocity isokinetic strength (X₂)	Y = 11.753 − 0.011 X₁ + 0.004 X₂	0.296	0.271	11.569	0.449	< 0.001

ISSN: 2052-1847