Table 3.
Mean, standard deviation (time), two-way ANOVA (sex, and starting block) with Bonferroni in 50-m and 100-m individual freestyle.
Time (s)
Block time (s)
Men (m)
(n=829)
Women (w)
(n=827)
Men (m)
(n=829)
Women (w)
(n=827)
Mean (SD)
Mean (SD)
Mean (SD)
Mean (SD)
50-m freestyle
Old platform (n=509)
22.5 (.41)
25.6 (.55)
.75 (.64)
.77 (.06)
New platform (n=318)
22.1 (.47)
25.1 (.61)
.68 (.44)
.71 (.47)
100-m freestyle
Old platform (n=511)
49.6 (.80)
55.6 (.99)
.76 (.05)
.79 (.06)
New platform (n=318)
48.8 (.82)
54.6 (.94)
.70 (.04)
.73 (.05)
Whole sample by sex and starting block
Sex
Starting block
Men (m)
Women (w)
Old (a)
New (b)
50-m freestyle
.72 (.07)
.75 (.06)
.76 (.06)
.69 (.05)
100-m freestyle
.74 (.06)
.77 (.06)
.77 (.06)
.72 (.05)
Main effects and interactions
Sex
Starting block
Sex * Starting block
F
Diff.
p
F
Diff.
p
F
p
50-m freestyle
46.262
m<w
<0.001
a
291.859
a>b
<0.001
c
.278
.598
100-m freestyle
61.412
m<w
<0.001
b
244.563
a>b
<0.001
d
1.825
.177
a: effect size=-0.46;
b: effect size=-0.50;
c: effect size=1.24;
d: effect size=0.89