Sex Difference in Female and Male Ice Swimmers for Different Strokes and Water Categories Over Short and Middle Distances: A Descriptive Study

Sports Medicine - Open

Table 2 Meantime in each stroke and water temperature category by sex in 25 m races

Stroke	Water category	Sex	n	Mean time	SD		Minimum	Maximum	p Value	Power	Effect size
Butterfly	Cold water	Female	140	00:22.6	±	00:07.0	00:56.8*	00:15.1	< 0.001	0.691	− 0.40
	Cold water	Male	220	00:18.5	±	00:04.9	00:39.4	00:12.0	< 0.001	0.691	− 0.40
	Freezing water	Female	194	00:23.3	±	00:07.4	01:05.5*	00:14.0	< 0.001	0.774	− 0.35
	Freezing water	Male	372	00:19.0	±	00:05.9	00:55.7	00:12.2	< 0.001	0.774	− 0.35
	Ice water	Female	221	00:21.2	±	00:05.9	00:48.7*	00:13.8	< 0.001	0.714	− 0.32
	Ice water	Male	366	00:18.7	±	00:06.3	01:15.6	00:11.6	< 0.001	0.714	− 0.32
Freestyle	Cold water	Female	183	00:21.4	±	00:07.2	00:54.7*	00:14.0	< 0.001	0.858	− 0.42
	Cold water	Male	241	00:17.1	±	00:04.5	00:37.1	00:12.0	< 0.001	0.858	− 0.42
	Freezing water	Female	224	00:22.5	±	00:07.2	00:49.0*	00:13.2	< .001	.814	− 0.34
	Freezing water	Male	411	00:18.0	±	00:05.2	00:45.6	00:11.2	< .001	.814	− 0.34
	Ice water	Female	326	00:22.4	±	00:08.4	01:03.9*	00:13.1	< 0.001	0.987	− 0.39
	Ice water	Male	496	00:17.0	±	00:04.5	00:46.2	00:11.0	< 0.001	0.987	− 0.39
Head-up breaststroke	Cold water	Female	281	00:28.7	±	00:07.8	01:13.7*	00:16.7	< 0.001	0.990	− 0.45
	Cold water	Male	333	00:23.0	±	00:06.1	00:55.6	00:14.9	< 0.001	0.990	− 0.45
	Freezing water	Female	349	00:29.4	±	00:08.8	01:21.3*	00:13.3	< 0.001	0.990	− 0.42
	Freezing water	Male	549	00:23.3	±	00:06.9	00:57.2	00:14.4	< 0.001	0.990	− 0.42
	Ice water	Female	758	00:28.6	±	00:08.0	01:08.5*	00:15.0	< 0.001	0.999	− 0.43
	Ice water	Male	813	00:22.6	±	00:05.8	00:50.1	00:13.4	< 0.001	0.999	− 0.43

Data expressed in (mm: ss. ms); *p < 0.05 (sex difference for the same swimming stroke and water category)