how to breathe while doing 5th rite

1. 5th rite - Do we need to do it like push-ups which is strenuous or we just get into inverted v position and change to head up position directly without doing like a push-up

2. Breathing -

a. I normally used to breathe while getting to head up position and breathe out while moving to inverted v-position.

b. Some five tibetan sites suggest breathing in while moving to inverted v-position and breathing out while getting to head up position.

Which is right a or b?

Can someone please clarify.
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