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Table 5 Stepwise multiple regression analysis for predicting 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

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
Slow-velocity isokinetic strength (X2) 0.449