Thank you for your question!
It is generally believed that species who take less breaths, live longer. A breath is an outcome of other things going on in a bodily system.
For instance, an athlete in general needs to have certain anaerobic and aerobic training to perform in its activity. Anaerobic training is the most demanding and puts greater stress in the body. The outcome of that training is generally that your pulse rate will be slower and it is believed that this is an indication of less workload for the cardiovascular system. That relates to a more efficient oxygen intake. (less breaths)
So that is the paradox, to train to have a more efficient cardiovascular system. However if you do strenuous physical activities once in a while, that lack of training could be detrimental for your health.
At the end of the day, it is not the number of breaths what matters, but the quality of your life.