that was a little like that (albeit not with an insane amount of weight). I was supposed to do
1. 0.5*my pre-injury max for 1/8 to 1/4 normal range of motion
2. 0.25*my pre-injury max for about 1/2 normal range of motion
3. just the sled for full range of motion
I'm not saying that is what they were doing, but that was my regimen in the first couple of weeks post-range-limiting-brace.