Table 3 A regression slope of each kinematic variable at kilometers 8 and 40 and its slope difference between kilometers 8 and 40.
Slope Slope difference
Kinametic variables 8 km p value 40 km p value p value
Stride length .013 .528 .020 .340 .521
Contact time -.005 .208 -.007 .113 .461
Peak knee flexion during support 2.299 < 0.001 * 4.085 < .001* < .002
Peak hip extension during swing .905 .480 1.024 .448 .887
Peak knee flexion during swing 2.853 .063 1.529 .341 .175
Peak hip flexion during swing 2.228 .072 .891 .449 .063
The fast runners had significantly more peak knee flexion at support than the slow runners.
The fast runners decreased their peak knee flexion during support significantly less than the slow runners at 40 km when compared to 8 km.