OMG, I have said many times that it’s a function of what the horse is thinking, not simply doing. You cut off some of my comments to disprove what you want me to have said.
I have said if the horse isn’t thinking energy, impulsion, he’s not thinking forward, and that makes for a poor RB maneuver. Others have same the same thing - energy
Who cares what the muscles are or aren’t doing, they aren’t doing the same thing in a canter pirouette as they are in an extended canter either.
The ENTIRE point of using "forward’ is to think energy. You absolutely ask a horse to move forward, but block that forward movement, so that he decides to try moving in the backwards direction.
Truly, once someone understands that concept, then downward transitions, halts, and yes, the rein back, become so much easier to get. Otherwise, it’s all about the hands to pull the horse from canter to trot, trot to walk, walk to halt, and halt to rein back, and that won’t be a correct transition.
Never heard someone say, to get a good trot-walk transition, to “ride forward into the walk”?
If all you can do it take a word literally, take it entirely out of the context in which it’s used, then a whole lot of important concepts get lost.
Try actually reading the link I posted, because they use “forward” in exactly the manner I have been.