This is an extension of the Long Deep Breath practice. In this breath, the halation is to the count of 20; then pause, suspending the breath for a count of 20; finally exhale to a count of 20. You can begin this practice by starting with smaller intervals: 8-8-8, 10-10-10 and so on, working your way up to the full One Minute Breath.
It is said that in a conflict, the person who can breathe the slowest has the advantage. So this breath can serve you in more ways than one!