I argue that it could indicate that 'physical tension' doesn't lead to halting of the speech movements (or inhibiting execution of motor movements), but if people who stutter 'believe' that tightening leads to prolonging/blocking, then it's not the physical tension itself, but rather the perceived 'threat' that works as a trigger of prolonging/blocking, in my opinion. The opposite is also true, physical tension is not necessary to reinforce fluency. If we take a closer look at how non-stutterers execute motor movements, they instruct/decide/have the intention or urge to initiate speech movements. In contrast, often people who stutter claim that doing the opposite is more effective (in a lack of a better solution) which is avoiding this instruction/decision/intention/desire/urge to execute motor movements. An argument could be that this instruction is a 'trigger'. In my opinion, however, if we keep avoiding this instruction to execute motor movements, then we will likely make this trigger worse, so that the next time we speak, we are triggered quicker. In your experience, do you deliberately instruct/decide to send command signals to execute motor movements or do you avoid it?