how to do plank correctly

4:22

2:55

10:02

3:02

3:27

کوتاه

1:51

2:47

4:14

2:46

3:07

1:35

5:51

5:51

10:38

2:00

3:51

4:08

3:28

12:31

5:34

4:08

17:32

6:50

4:01

3:56

9:29

4:34

4:34

6:08

5:34

9:48

3:02

3:02

11:19

9:48

5:08

13:57

6:08

6:08