Chopper0080
2021 - Prove It
That they could run it better still has nothing to do with whether the no huddle fatigues players faster than a regular offense.
Defense is naturally more tiring than offense. It takes more energy to react than it does to move in a predetermined pattern. What the no huddles does is magnify this by preventing the defensive players from substituting and therefore tiring them faster than the offensive players. Why the no huddle is predominately used after a first down conversion is because key defensive personnel aren't fresh having played 2 or 3 downs already, and can't get their energy up. Once these smaller rushers are tired, they are easier for the larger linemen to block which gives the QB more time in the pocket to throw.