I see many people whose focus is far more on preventing something from happening in an exercise task than on directing their attention and awareness towards the intended experience of it. When I ask them what they are really wanting to happen, they are amazed to realise they are a bit hazy about it. So, their effort is bottled up in resisting something from happening, an anti movement intention, instead of efficiently directing their effort and intention into positive purpose.
Here’s the science: brains respond much more readily to “do” messages than “ don’t do” messages. Are you clear enough about the purpose, direction, impulse, sensory experience and intention of a task to cue it without falling back into the “don’t do”?