swimming technique butterfly

5:27

8:18

6:28

17:30

1:42

8:15

5:42

2:01

8:35

3:40

2:49

1:18

4:29

4:25

14:11

12:34

2:27

5:18

10:07

36:08

1:16

4:56

9:06

4:57

1:01

2:20

9:38

1:50

11:33

10:14

4:44

7:38

00:50

12:17

4:45

4:51

1:29

12:07

3:34

49:02

00:31

4:46

31:52

14:57

1:56

9:32

7:21

13:10

2:15

1:41

1:19

2:01

4:57

8:08

1:23

1:03

1:15

20:48

5:40

1:00