So if you walk from the very beginning, the first one to think about is what we'll just call skill. So this is improving anything from say a golf swing, to a squatting technique, to running. And this is just simply moving mechanically, how you want your body to move. I'm just going to globally call that skill. From there, we're going to get into speed. So this is moving as fast as possible. The next one is power, and power is a function of speed, but it is also a function of the next one, which is strength. So if you actually multiply strength by speed, you get power. ... Once you get past strength, and the next one kind of down the list is hypertrophy, this is muscle size, right? Growing muscle mass is one way to think about it. After hypertrophy, you get into these categories of, the next one is, these are all globally endurance-based issues. And the very first one is called muscular endurance. So this is your ability to do how many pushups can you do in one minute? You know, things like that. Past muscular endurance, you're now into more of an energetic or even cardiovascular fatigue. So you've left the local muscle, and you're now into the entire physiological system, and its ability to produce and sustain work. And we can get into a bunch of differentiations with an endurance, but just to keep it really simple right now, the very first one, think about this as, I call this anaerobic power, right? So this is your ability to produce a lot of work for say 30 seconds to maybe one minute, kind of two minutes like that. The next one down then is more closely aligned to what we'll call your VO2 max. So this is your ability to kind of do the same thing, but more of a time domain of say three to 12 minutes. So this is going to be a maximum heart rate, but it's going to be well past just max heart rate. Then after that we have what I call long duration endurance. So this is your ability to sustain work. The time domain doesn't matter in terms of how fast you're going. It's how long can you sustain work? This is 30 plus minutes of no break. Like that. So as just an high level overview, those are the different things you can target.