Yes, activity "grounds" the inner silence and ecstatic energies we
cultivate during meditation, pranayama, and other practices.
Actually, the word "integrates" is a better description. Over time,
as we do practices daily and are active in normal life according to
our inclinations (no special conduct or activity required), we come
to naturally sustain the qualities of inner silence and ecstasy all
the time, no matter what we are doing. That is the fruit of all this -
being out in the world, living our life as we choose, becoming a
self-contained bundle of unbounded ecstatic bliss, and radiating that
wherever we go.
Meditation will always give us what we need, because we are bringing
up pure bliss consciousness from within, the source and sustainer of
all that we are. If there is some accumulation of fatigue in the
nervous system, meditation can bring us into a sleep-like state
during or right after practice. This sleep associated with meditation
is of a much deeper variety than ordinary sleep. Deep-rooted
impurities are being dissolved. So, we don't force against sleep if
it comes during or right after meditation. Of course, if we have to
get up and go to work, then we do that. If we have the time to honor
a need for more rest, we should allow it. There are cycles that come
and go along our journey in practices. We may go through a period of
falling asleep during or after meditation. And then one day, we are
wide awake and radiating bliss. Some clouds have been dissolved. As
mentioned in a recent lesson, sometimes we can have both the bliss
and the clouds. It is all part of the process of purification on the
road to enlightenment