Table 1 Absolute and percent differences in swimming speed (short course 25 m - long course 50 m) for men and women competing at national and international level over different distances

Men at national level

50 m

0.05 ± 0.00

2.10 ± 0.19

< 0.0001

100 m

0.05 ± 0.01

2.64 ± 0.39

< 0.0001

200 m

0.03 ± 0.02

1.79 ± 0.99

0.048

400 m

0.04 ± 0.02

2.39 ± 0.94

0.01

800 m

0.03 ± 0.01

2.11 ± 0.30

0.0005

1500 m

0.03 ± 0.01

2.12 ± 0.30

< 0.0001

Men at international level

50 m

0.06 ± 0.01

2.59 ± 0.25

< 0.0001

100 m

0.05 ± 0.01

2.50 ± 0.38

< 0.0001

200 m

0.04 ± 0.01

1.84 ± 0.49

< 0.0001

400 m

0.03 ± 0.01

1.58 ± 0.40

< 0.0001

800 m

-0.01 ± 0.01

0.63 ± 0.63

0.13

1500 m

0.03 ± 0.01

1.45 ± 0.31

< 0.0001

Women at national level

50 m

0.06 ± 0.01

2.84 ± 0.40

< 0.0001

100 m

0.04 ± 0.01

2.35 ± 0.36

< 0.0001

200 m

0.04 ± 0.00

2.65 ± 0.17

< 0.0001

400 m

0.03 ± 0.00

2.10 ± 0.25

< 0.0001

800 m

0.03 ± 0.01

2.10 ± 0.40

0.0003

1500 m

-0.09 ± 0.02

-6.43 ± 1.55

< 0.0001

Women at international level

50 m

0.03 ± 0.01

1.47 ± 0.51

0.0035

100 m

0.03 ± 0.01

1.73 ± 0.36

0.0005

200 m

0.03 ± 0.01

1.53 ± 0.53

< 0.0001

400 m

0.02 ± 0.00

1.14 ± 0.19

0.0003

800 m

0.02 ± 0.01

1.35 ± 0.38

0.0003