Table 6 Multi-level regression analyses for change in running speed across years for the annual fastest male and female runners after correction for multiple finishes and age of athletes with multiple finishes

Annual fastest men

6 hrs

0.018

0.016

0.183

1.095

0.285

12 hrs

0.027

0.018

0.272

1.445

0.161

24 hrs

0.075

0.013

0.747

5.891

<0.0001 *

48 hrs

0.013

0.012

0.193

1.036

0.310

72 hrs

0.126

0.023

0.712

5.443

<0.0001 *

6 d

-0.020

0.011

-0.316

-1.767

0.088

10 d

0.001

0.037

0.009

0.030

0.977

Annual fastest women

6 hrs

0.129

0.026

0.730

4.959

<0.0001 *

12 hrs

0.075

0.015

0.722

4.866

<0.0001 *

24 hrs

0.099

0.027

0.578

3.739

0.001 *

48 hrs

0.074

0.021

0.604

3.628

0.001 *

72 hrs

0.058

0.031

0.386

1.872

0.081

6 d

0-.013

0.016

-0.212

-0.818

0.421

10 d

0.104

0.017

0.883

6.248

<0.0001 *