So no longer sore or stiff from that sledgehammer day but still not performing at 100% so I’ll give it another day. Max power tangibly increased already though, in both the sense-response of lifting things and in running my hand along parts of the torso.

Think this actually clears up a lot of the remaining physical issues, though. The core strength seems to be what the walking needs (conversely, I think raised-arch stance is better for twisting-swinging force like hammer blows) and I think a lot of the gravity multiplier stuff is really weakness at the elbows and knees that makes lifting the feet or hands more draining, and as things build that clears too