Table 4 Multi-level regression analysis for changes in swimming speed for finalists in the Olympic Games in freestyle, breaststroke, backstroke, butterfly and individual medley with correction for multiple participations and age of the athletes

Freestyle

Male

50

0.005

0.001

0.856

9.415

< 0.001

100

0.004

0.000

0.841

10.247

< 0.001

200

0.003

0.000

0.671

6.030

< 0.001

400

0.002

0.000

0.530

4.087

< 0.001

800

0.002

0.000

0.537

4.245

< 0.001

1500

0.002

0.000

0.623

5.282

< 0.001

Female

50

0.004

0.001

0.718

6.840

< 0.001

100

0.003

0.000

0.800

8.683

< 0.001

200

0.003

0.000

0.785

8.254

< 0.001

400

0.002

0.000

0.703

6.790

< 0.001

800

0.002

0.000

0.620

5.832

< 0.001

1500

-

-

-

-

-

Breaststroke

Male

100

0.003

0.000

0.779

7.649

< 0.001

200

0.003

0.000

0.801

8.939

< 0.001

Women

100

0.003

0.000

0.799

8.689

< 0.001

200

0.003

0.000

0.889

10.386

< 0.001

Backstroke

Male

100

0.004

0.000

0.763

8.171

< 0.001

200

0.004

0.001

0.711

6.761

< 0.001

Women

100

0.004

0.000

0.823

9.141

< 0.001

200

0.003

0.001

0.662

5.902

< 0.001

Butterfly

Male

100

0.004

0.000

0.863

10.782

< 0.001

200

0.004

0.000

0.866

10.489

< 0.001

Women

100

0.004

0.000

0.740

7.850

< 0.001

200

0.003

0.000

0.731

7.083

< 0.001

Individual medley

Male

200

0.003

0.000

0.733

7.130

< 0.001

400

0.003

0.001

0.624

5.447

< 0.001

Women

200

0.004

0.001

0.779

7.723

< 0.001

400

0.003

0.000

0.674

6.199

< 0.001