That's actually how it should be. I think you should aim for 4 to 5 breaths per minute, I don't remember the exact number.
The technique is described by Kelly McGonigal in "The Willpower Instict" as being the only scientifically proven "quick hack" to make your brain relax and focus.
The technique is described by Kelly McGonigal in "The Willpower Instict" as being the only scientifically proven "quick hack" to make your brain relax and focus.