Table 3.
Percentage of performance improvement and intra-swimmer coefficient of variation between rounds in the men Top16, semi-finalists and finalists.
Event
Swimmers
E-H
H-SF
SF-F
p-value
%IMP
%CV
p-value
%IMP
%CV
p-value
%IMP
%CV
Fr50
Top16
<0.001
-1.02±0.55
0.72
0.048
0.43±0.63
0.38
-
-
-
Semi-finalist
0.002
-1.14±0.57
0.81
1.000
0.11±0.30
0.18
-
-
-
Finalist
0.013
-0.90±0.54
0.64
0.137
0.75±0.73
0.58
1.000
0.35±0.78
0.44
Bk50
Top16
0.048
-0.77±1.14
0.77
0.004
0.74±0.74
0.60
-
-
-
Semi-finalist
0.026
-0.66±0.52
0.55
0.156
0.62±0.75
0.58
-
-
-
Finalist
0.963
-0.88±1.58
0.99
0.093
0.86±0.77
0.62
0.482
-0.22±0.31
0.19
Br50
Top16
†
0.698
-0.37±1.12
0.67
0.010
0.28±0.30
0.23
-
-
-
Semi-finalist
‡
1.000
-0.31±1.37
0.74
0.182
0.11±0.82
0.28
-
-
-
Finalist
1.000
-0.28±0.91
0.60
0.167
0.23±0.24
0.18
1.000
0.07±0.61
0.33
Fly50
Top16
1.000
-0.04±1.90
0.97
1.000
0.50±0.84
0.92
-
-
-
Semi-finalist
1.000
-0.18±1.23
0.68
1.000
0.17±0.70
0.33
-
-
-
Finalist
1.000
0.10±2.50
1.12
0.209
0.82±0.89
0.66
1.000
-0.03±0.93
0.56
Fr100
Top16
0.639
-0.31±0.94
0.54
0.009
0.70±0.78
0.64
-
-
-
Semi-finalist
1.000
0.19±0.70
0.36
1.000
0.12±0.68
0.39
-
-
-
Finalist
0.243
-0.81±0.91
0.72
<0.001
1.27±0.26
0.89
0.021
-0.63±0.41
0.45
Bk100
Top16
<0.001
-1.26±0.76
0.91
0.009
0.80±0.91
0.61
-
-
-
Semi-finalist
0.002
-1.28±0.60
0.91
0.945
0.13±0.33
0.18
-
-
-
Finalist
0.048
-1.23±0.94
0.90
0.007
1.47±0.80
1.03
1.000
0.18±0.95
0.55
Br100
Top16
<0.001
-1.03±0.67
0.76
0.111
0.43±0.75
0.53
-
-
-
Semi-finalist
0.034
-0.69±0.57
0.55
1.000
0.11±0.80
0.48
-
-
-
Finalist
0.003
-1.37±0.61
0.98
0.045
0.75±0.57
0.59
1.000
0.07±0.36
0.22
Fly100
Top16
0.005
-0.85±0.90
0.71
0.002
0.52±0.99
0.41
-
-
-
Semi-finalist
0.025
-0.67±0.52
0.47
0.016
0.51±0.36
0.37
-
-
-
Finalist
0.254
-1.04±1.18
0.95
0.294
0.53±0.63
0.45
1.000
-0.05±0.33
0.18
Fr200
Top16
<0.001
-0.99±0.62
0.70
0.001
0.40±0.35
0.33
-
-
-
Semi-finalist
0.002
-1.17±0.55
0.83
0.460
0.25±0.44
0.27
-
-
-
Finalist
0.069
-0.81±0.67
0.57
<0.001
0.56±0.14
0.39
0.136
0.49±0.48
0.39
Bk200
Top16
<0.001
-1.28±1.03
0.94
0.281
0.35±0.77
0.62
-
-
-
Semi-finalist
0.026
-1.37±1.08
0.98
1.000
-0.06±0.80
0.47
-
-
-
Finalist
0.093
-1.18±1.05
0.90
0.016
0.76±0.48
0.57
1.000
0.22±0.82
0.44
Br200
Top16
†
<0.001
-1.43±0.96
1.08
<0.001
0.63±0.51
0.49
-
-
-
Semi-finalist
‡
0.042
-1.06±1.31
1.04
0.092
-0.17±1.12
0.43
-
-
-
Finalist
0.018
-1.49±0.94
1.11
0.031
0.75±0.54
0.53
1.000
-0.02±0.43
0.27
Fly200
Top16
0.002
-0.91±0.86
0.73
0.002
0.75±0.70
0.63
-
-
-
Semi-finalist
0.107
-0.76±0.82
0.65
0.606
0.34±0.67
0.45
-
-
-
Finalist
0.083
-1.06±0.93
0.82
0.001
1.16±0.45
0.81
1.000
0.14±0.85
0.44
Fr, freestyle; Bk, backstroke; Br, breaststroke; Fly, butterfly; E, entry times; H, heats; SF, semifinals; F, finals; %, percentage; IMP, performance improvement; CV, intra-swimmer’s coefficient of variation.
‡, n=7
† , n=15