when do you know you have pushed your self to the limet in exersise

Question: when do you know you have pushed your self to the limet in exersise
- Keywords:
  exercise,
  limit
Asked by pc-plum at your rescue to Dan on 7 Mar 2018.
- Dan Gordon answered on 7 Mar 2018:
  
  Very nice question. Basically two things happen, either we slow down or we have to stop. The problem is that we are able to bypass the mechanisms in the brain that regulate this and this is where problems can occur:
  
  So in the clip I sent you to the link to you can see what happens when we bypass the signals that cause us to stop or slow down. They have been overridden and so we end up getting into this situation. Pacing is designed to try and prevent this from happening.

Question: when do you know you have pushed your self to the limet in exersise