It’s more in the lung capacity, and the diaphragm strength.
I guess I meant something more in the line of a robust verbal greeting.
I suppose “robust” and “hefty” mean pretty much the same thing, eve if we don’t usually treat them as interchangeable.
Speaking of “hefty,” Wednesday just sauntered by, looking rotund. I think she’s waiting for the children to go to bed before she appears for the evening.