If you take a closer look at some full body outfits released before you’ll notice it already has the arched back, yes this has been on the making for a looooong time. Finally both top and bottom have a slightly arched back, this makes for a “curvier” derriere and because of that it will clip on the back of the hip when combined with CC made for version 1.5 also MedBod is not compatible with clothes made by EA and everyone else, some might be wide enough to hide the gap that appears on the hip, you`ll have to experiment. The difference compared with MedBod 1.5 is that I removed double vertices on the bottoms, corrected the normals and smoothed the UV for the top I made some modification to the neck’s shape to be closer to the default body.
I made several changes including inserting the boobs form Cmar’s naked torso and increased the polycount and shape for the buttocks / legs. The base for this custom body is the one Electronic Arts created for The Sims Medieval which is more “muscular” compared to The Sims 3.