 Hey everybody, I'm Lance Coyke and today we're going to discuss all three energy systems that we've already talked about we've already defined But I want to talk about the pie that they share So if you think about a pie chart, there's this total area, which we might say is 100% and We can think about each of the three energy systems Supplying a proportion of this total hundred percent of energy and now This this changes based on the activity that you're doing But what I want to make very very clear here. I'm just gonna Start with a lead here All three of these systems are working at the same time all the time So I simplify the explanation of the aerobic system so that you can kind of pick up that it's slower than the other ones It doesn't create energy at the same rate But it's kind of starting right away. It's going right away even in you know a ten second Triple on the deadlift even in one of those long grueling triples on the deadlift It's starting and it's helping and it's working now We talk about weightlifting as an alactic anaerobic activity but that is not you know that it that itself is not an accurate description it is a Tri-energy system. I've never really used that term, but it's a three energy system activity The difference becomes in this pie. It's this proportion. Somebody's here It's this proportion of everything that is working so in something like a hundred meter sprint that Phosphogen system that a lactic anaerobic system might be using or might be given us about Half of your energy and then maybe a quarter of it comes from the lactic anaerobic system And then maybe another quarter of it comes from the aerobic energy system But again, we're sharing the pie now if I'm doing a Marathon maybe at the beginning of the marathon maybe about a quarter if I'm going slow enough Maybe a quarter of the energy comes from my A galactic anaerobic system Maybe a quarter of it comes from the lactic anaerobic system and then maybe half of it comes from the aerobic system But on you know our two of a marathon that proportion changes a little bit And what we see is as activities last for longer The slice of the pie that the aerobic energy system takes is bigger and bigger and bigger So this system the oxygen system the aerobic system is the one that fights off that fatigue It's the one that creates energy for long long periods of time. It's got all these steps Nothing really gasses out. Nothing really gets backed up in these biochemical pathways And I'm you know, I'm sure if you go for long enough something will happen especially if you impair blood flow And you know perhaps like electrolyte balance and a Limitation in your cardiac output in your heart. We will talk about cardiac output more later Just kind of tease in if you know some terms But that's that's the whole idea now those other systems. They haven't shut off I'm still trying to use that a lactic anaerobic system It's still you know putting that phosphate back on the ADP to make ATP It's still doing that. It's just not able to you know, it doesn't have a built-up store of everything So it's not able to do that, you know in perpetuity It just slows down. It can't can't do like a really really fast kind of thing But the upside is that you know now the aerobic energy system has had time to get going and it's you know it's a well-oiled machine and You know, we talked about this a little bit in a couple videos ago, but that lactic anaerobic system Most of that system is actually part of the aerobic system that glycolysis pathway is the first step of your aerobic pathway, so if I you know, I might at some point I go through all my glycolysis and I take my Pyruvate my end product and I continue on down the aerobic system But you know sometimes it might get a little backed up and there might be another enzyme Maybe called lactate dehydrogenase that says hey, buddy I can help you and it turns one of those pyruvate into a lactate and then it takes that over to the liver And then it stores that for later and it metabolizes that in the liver These processes all occur at the same time It's not a switch of on and off It is a dial of more and less and that's the major point that I want to get across here