Just by breathing more and reminding yourself to breath deeply, you can help improve the overall wellness of your body. Breath deeply!
I find deep breathing useful to alleviate tiredness especially when I wake up in the morning and wait for the groggy feeling to dissipate, and the first ten minutes or so upon waking up would be an almost instinctual act of deep breathing before I would feel more awake. Similarly on weekdays I would endeavour to increase oxygen intake when taking breaks from the computer by walking up and down the stairs to get some exercise in the afternoon, which naturally causes me to breathe more deeply. Like what this blog shares, God is in our breathing, and oxygen can be seen as that aspect of God/Spirit that gives us life, healing and refreshment.