Table 3.
Mean, standard deviation (time), two-way ANOVA (sex, and starting block) with Bonferroni post-hoc 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 | <0.001a | 291.859 | a>b | <0.001c | .278 | .598 | |
| 100-m freestyle | 61.412 | m<w | <0.001b | 244.563 | a>b | <0.001d | 1.825 | .177 | |
a: effect size=-0.46;
b: effect size=-0.50;
c: effect size=1.24;
d: effect size=0.89