trunk muscles

5:39

6:24

6:24

1:21:02

45:40

1:43

2:21:00

1:38

13:52

23:10

1:13

14:20

9:22

12:40

57:08

13:35

27:00

7:01

27:38

1:28

39:35

6:10

18:30

15:36

15:55

4:42

2:38

19:57

1:26

44:13

11:32

29:49

1:20:31

19:06

17:57

1:46

12:24

8:35

14:14

10:20