2 things:
1) The scientific process behind the building up of muscles involves first the breaking down of your current muscles by acids followed by a recovery period where your muscles grow back in such a way that you end up with more muscles than you started with.
2) In taekwondo we always trained in continuous sessions with no breaks even for water. There were probably many reasons for this though I'm not informed enough on the theory involved in the training regime to explain it.
1) The scientific process behind the building up of muscles involves first the breaking down of your current muscles by acids followed by a recovery period where your muscles grow back in such a way that you end up with more muscles than you started with.
2) In taekwondo we always trained in continuous sessions with no breaks even for water. There were probably many reasons for this though I'm not informed enough on the theory involved in the training regime to explain it.