I didn't know there were names for these either...<br><br>I swith between the VTO and Valsalva as a descend. If I am doing an Open Water class dive I probable do more Valsalva so students can see me and it reminds them to equalize frequently. If I am doing for myself it is more VTO than Valsalva...to be honest I really don't put much thought into it when I am not teaching.