Is There a Difference Between a 72 Hour Fast and a Time Limit?

Fasting is like putting the fast forward button on your metabolism. It kind of runs parallel with just the same thought of a, what initionally kind of avoided any sort of time restricted feeding type strategies. So it kind of got me thinking about, if i were to start doing any sort of structured fasting during my training, do i want to be looking at from an energy output standpoint versus a time standpoint? And thent me almost. What i'm trying to do is a 72 o fast, but only do it in 24 hoursye, exactly, yes.