The Crisscross
A diagonal wheelbarrow. The receiving partner's upper body rests on the bed while their body angles across the standing partner's hips.
The receiving partner starts on hands and knees at the edge of the bed, facing away from the standing partner, who stands behind them. The standing partner takes hold of the receiving partner's hips and lifts them slightly, and the receiving partner lets their legs come off the bed and swing to one side, so their body crosses the standing partner's hips on a diagonal instead of straight on. Their legs trail out behind and to the side of the standing partner, and their hands or forearms stay planted on the bed, with a pillow under the chest if that helps. The standing partner carries the lower body by the hips and thighs and moves in short strokes. Shifting the angle of the diagonal changes where the pressure lands, so take a moment to find the right side.
A sideways angle that feels quite different from regular wheelbarrow, with the upper body supported by the bed. For couples who like a bit of acrobatics.
Keep the receiving partner's knees on the bed and just turn their hips to the side; you get the diagonal angle without any lifting.
Use the bed's edge so the receiving partner's chest has somewhere soft to land, and lower down together before anyone gets tired.
This one takes real strength and balance. Skip it with a bad back, wrists or knees, and try it near the bed so there's somewhere soft to land.
Agree on it before you try it, use plenty of lube, and either of you can stop at any point. This guide is general information, not medical advice.