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.
