I'd say no, but I'm a layman. I think the situation you describe is "just" an interaction between different systems which, together, make the whole open macrosystem which is your body. If I can push myself to go even further, I'm probably triggering something in my nervous system (via a high-level cognitive process - motivating myself, thinking "positive") which will in turn signal other systems which can then provide energy or stimulation to go on.

in the sense that you tend to consciously reinforce perceived limits, yes