“Fascia is a structure of connective tissue that surrounds muscles, groups of muscles, blood vessels, and nerves, binding some structures together, while permitting others to slide smoothly over each other..”
If you think of the membranes you see when looking between the parts of a raw chicken, between the muscle meat- that’s what fascia looks like.
It should move freely without adhesions or obstructions.
On a physical level, practicing YOGA affects the fascia in a particularly beneficial way, by enhancing blood flow and movement to the fascia itself- i.e. energy flow- and to the surrounding muscles and nerves through stretching and contracting.
(Supplementing your practice or class with a bit of self massage with a foam roller for fascia release is another good technique, in fact if you have to be sedentary for some time- say on a long flight, just use the side of your hand along your longer muscles, thighs etc.)
A good YOGA session has poses and counter poses to activate fascia, release fascial tension and restore equilibrium. These benefits last for 4 days.
So practicing yoga twice a week, whether that is a class or your own practice, should have your fascia covered!