ᕦ(ò_óˇ) Day 5 of exercising everyday before the saloon opens

Oh, oh, I got late with posting this. Got too distracted with notifications and the Pay It Forward Initiative and then some more notifications.

I went for a run today. It took me 31:37 to run roughly 5km.

In German, we actually call it "joggen" not "rennen". I looked up if there is a better translation than "run" (since you don't really run if you try to "run" a long distance or for a long period of time). There is also "to jog" in English. But it feels like this is not used much? Is this more like a trap where you can notice if people use "to jog" that English is not their mother tongue?

Anyway. When I run, I don't try to run for a specific period of time. I try to run a specific route (with a specific distance) with checkpoints in mind.

I do this because I think it makes it easier to "not cheat" by just running very slowly. Anyone can "run" 30min+ if you just walk. Running a specific distance is therefore imo a good benchmark. This way, you can also make a competition out of this by measuring your time.

This always brings me to this question: What is the fastest way to travel a specific distance, therefore optimizing for least time? And what is the most efficient way to travel a specific distance; optimizing for least energy expended?

For example, if we keep the distance fixed, we can expend energy to travel the same distance in less time.

But when we start to target long enough distances (for example, 10km), it becomes obvious that we can't expend maximum energy all the time since we will get too exhausted. And then we will probably be a lot slower since we still have to travel a long distance even after all our energy is already depleted.

So what is the optimal speed for least energy expenditure? And at which point do you start to run as fast as you can to achieve your fastest time?