I honestly must admit thatI was a bit perplexed at what you meant by "abdominal breathing" as googling it returns results that suggest it is some sort of relaxation technique.
In any case, being a native English speaker, I certainly do not think that I breathe differently than any Asian I have met. Pronunciation can come from different places. The primary place of articulation tends to get fuller and richer as it gets further "down" in your throat, which would lead me to think that this perception of shallowness is primarily due to the process of articulating the sound, not in how a person breathes.
（後略） まだ複数の方から回答があります
In any case, being a native English speaker, I certainly do not think that I breathe differently than any Asian I have met. Pronunciation can come from different places. The primary place of articulation tends to get fuller and richer as it gets further "down" in your throat, which would lead me to think that this perception of shallowness is primarily due to the process of articulating the sound, not in how a person breathes.
（後略） まだ複数の方から回答があります
