Is it possible to hold your b. for a very lengthy time

3 mins 24 secs

2 mins 45 secs

1 min 42 secs

3 mins 5 secs

5 mins 8 secs

6 mins 26 secs

6 mins 58 secs

5 mins 8 secs

5 mins 9 secs

5 mins 11 secs

5 mins 11 secs

5 mins 10 secs

5 mins 10 secs

5 mins 11 secs

5 mins 11 secs

5 mins 12 secs

5 mins 8 secs

5 mins 12 secs

5 mins 11 secs

5 mins 8 secs

5 mins 7 secs

5 mins 6 secs

5 mins 10 secs

5 mins 8 secs

5 mins 12 secs

5 mins 11 secs

5 mins 9 secs

5 mins 10 secs

5 mins 8 secs

11 mins 24 secs

5 mins 7 secs

5 mins 8 secs

5 mins 8 secs

10 mins 7 secs

1 hour 12 mins 16 secs

6 mins 34 secs

11 mins 4 secs

6 mins 51 secs

5 mins 19 secs

16 mins 47 secs