Terry,
my understanding of the main idea is this - get maximal amount
of work (excersize) from the muscles of the breathing apparatus
those invogorating them, without causing too much of CO2 removal.

Because air resistance is proportional to flow rate, at short
strong sniff you "pay" with maximal amount of work for the same
amount of inhaled air. So you get maximal amount of work-out
for minimal amount of air and CO2 loss.

Regards,
Evgenij

--- In strelnikova_exercise@yahoogroups.com, "peart702000"
<terry.pearson@...> wrote:
>
> Why a 'strong' sniff during the exercises ? - would a more relaxed
> sniff during the exercises be a better way of reducing the minute
> volume of air during inhalation ?
>
> Cheers
>
> Terry
>