Moving about frantically anxiously burns up energy.
Just think of a laptop.
High-performance settings will drain the battery very quickly.
Low-performance settings will allow the battery to go on for much longer.
But the difference for a human is that performance also suffers as our energy depletes.
We become more unproductive the more tired we get.
We become tired a lot quicker.
So conserve energy as much as you can.
“Nature does not hurry, yet everything is accomplished.”
– Lao Tzu