Think of your body as more than just a collection of muscles. You have a "body-wide tensional net" called fascia. It is a silvery-white, stretchy tissue that wraps around every muscle fiber, organ, and bone, acting like a giant elastic suit. While we often focus on building muscle, the fascia is actually what distributes the force when you move, returning about 90% of the energy you put into it.
Fascia is alive and adapts to how you move, but it is much slower than muscle. While muscles might change in weeks, it can take 6 to 24 months for your fascial network to fully reshape itself. Because fascia is made of roughly 25% water, staying hydrated is essential; without enough water, the layers of tissue can become "sticky" and gluey instead of sliding smoothly over each other. To keep this "suit" strong and flexible, you need varied movement — not just lifting weights in a straight line, but moving in different directions and speeds.