I’m gonna be honest I don’t think anyone knows what the point is that you’re trying to make.
Core and leg strength is already a hallmark feature of any sports strength programming. You don’t suddenly target “core strength” in response to an injury. Any large compound movement, especially the Olympic lifts coaches love, requires significant core strength.
And I’m not even getting into the silliness of the concept of truly loading the “core” here. What do people here think the “core” is? Abs? Do we completely disregard that the pelvis is the root of the “core”, and it’s very hard to load the “core” without some lower body load, which one would think would be avoided by a coach rehabbing an ACL tear.
Not attacking you, of course