Drop Swings
Practice a classic modern drop and release swing that lets the upper body drop toward the earth while the feet stay grounded.
Think of a trampoline. The legs spring and the body is buoyant, so tension leaves. Repeat the swing three times to teach the body muscle memory, then add the counter spiral of the spine.
A longer torso connects top and bottom half more easily. A shorter one takes a bit more work, but the approach is the same.