You can’t operate at top gear all the time. Even “Type A” people need some downtime or they will eventually burn out. I watch people all the time push themselves to the limit. You can see it in their eyes and read it in their body language when they are exhausted. And, tired people tend to underperform, make less than optimal decisions, allow their people skills to slip and if they are not careful begin to resent heir work. It’s very important for leaders to learn to pace themselves and set a good example for others to follow.