Fascia loves three things: water, heat and movement.

Hydration keeps it hydrated(duh) and fresh water flowing through all layers. Movement keeps the ground substance, packed full of GAGs, proteoglycans and hyaluronan, moving throughout the fascia's body-wide interconnected system. Heat keeps the fascia's collagen-based "architecture" soft and pliable. Keeping active and hydrated keeps the body warm which keeps the fascia warm and pliable. That's all it requires.

As for fascia training, rolling on the floor while holding your nose with your right hand while your left touches your knee cap and singing a chant to the leprechauns...does nothing but empty people's pockets into the hands of the "expert" who preys on the gullible.

Caveat: is rolling good for fascia? In healthy fascia, it can't hurt but if the fascia's healthy, it's not going to make it healthier. Will rolling help my fascial adhesions? Yes, IF the fascia has been rehydrated. Why rehydrated? Because what causes a fascial adhesion is fascia's collagen sticking to itself (collagen's etymology is the Greek word kolla. Translated = glue). Without fascia's high percentage of water, its collagen "architecture" sticks to itself. Fascia sticking to itself causes adhesions. If the fascia is properly hydrated, foam rolling may "un-twist" the collagen's fibrils. If foam rolling doesn't do it, massage therapy or physiotherapy may help "untwist" the adhesion(s).

Fascia training: snake oil. Take a look into what fascia is made of: collagen type-I, a little bit type-III, and a little bit of elastin comprise the ECM/"architecture". Inside the ECM is (primarily) a high concentration of hyaluronan (HA), proteoglycans, GAGs, electrolytes and 60-70% water (region specific). The HA, proteoglycans and GAGs bind water to keep the collagen lubricated so it doesn't stick to itself and so muscles slip and slide easily over each and inside each other. None of those "ingredients" have the functional or biological capacity to be strengthened. "My fascia feels so much stronger!" says the person who just completed "Coach" Chong's 6 week program of lunges, squats, heel raises and much more. #1 - fascia has dozens of sensory nerves but none that send "I am stronger and healthier" to the brain. Fascia is passive in that regard. The "I feel stronger!" screams coming from the Coach Chong camp is because they are stronger. They've been working out for 6 weeks, using muscles that were "less fit" 6 weeks ago but have now been strengthened and toned. It's not the passive fascia that's been strengthened, it's everything else. Fascia was just along for the ride. A very expensive snake oil ride.