I have heard that human lungs capture/absorb/process more oxygen by breathing slower.
A) Is the above true?
B) If so, if my primary concern was absorbing the most total oxygen (not most efficient), would it better to breathe deeply and quickly or deeply and slowly?
C) Are there any other considerations (e.g., will fast, inefficient breathing make me feel more tired even if I'm taking in more oxygen)?
D) Is there any "ideal" breathing rate (such as for sports) that is a good balance between volume of air intake and efficiency of absorption?