 Next question is from Kev Petreshen. Why is it that some PT certification companies focus significantly on the idea of VO2 Max as the greatest indicator of health and tool for program training? Because that's what the studies center around. So one of the challenges that I have with a lot of certification courses is also a lot of their strengths, which is they focus heavily on data. And when you look at the studies on physical performance and health, there's lots of studies done on VO2 Max in endurance, very little studies done on strength. And they're all athlete driven, which has no real relation to like everyday average people. Yeah, so. It's also very, it's one variable that you're looking at versus it was measuring strength and muscles. Sounds like cholesterol. Yeah. But there's a lot of moving parts when it comes to that. Like as far as somebody's, somebody's rest could have been good for a day. So their strength is down or up. Like, so things like that. Well, we do now have studies on strength and they are very simple. They use a grip strength test and it's actually a better predictor of all cause mortality than other single metrics. It's my favorite way to do it. But it's just, there were no tests. Like there were no studies. All the studies were done on stamina and endurance. If you were research in the 1990s or before and you wanted to study the correlation between physical fitness and longevity, you would almost always pick some type of an endurance metric. So there's a lot of studies that are done on that. There's very few done on flexibility or strength. Although now we're starting to see a lot on strength. They're starting to show that there's a huge connection between strength and longevity. So this is why they do that. Now, here's the flaw in that. You're training average everyday people and you're a new trainer and all you're looking at is VO2 max and you ignore mobility. You ignore strength. You ignore how well they are able to fire particular muscles and posture and movement because you're just focused on VO2 max. Plus training VO2 max is a bit inappropriate for a lot of clients, right? Like if I have a 60 year old client who's never exercised, like probably not a good idea to push them to max out their VO2. It's also really easy to manipulate and to improve. I don't know if you guys have read the stuff on, like you could improve your VO2 max every day. Every day you can improve it. It's a pretty fast adaptation. Yeah, it's a very fast adaptation. So it's like, I don't know. I'd rather focus on something that I think that's gonna take a little bit more skill, more time and better behaviors and get that in my client before. I mean, I could put them on two weeks of every day doing some intense cardio and by the end of two weeks we're gonna have a huge difference in their VO2 max. Well, I mean, what's the most protective? And we've seen multiple studies now coming out about muscle being one of the best things to pursue because of the strength and the protective qualities it has for all kinds of things, even with prevention of disease, it protects your organs. So many benefits to that. And then also just like eliminating aches and pains for the long haul versus like you focus on cardiovascular output, that repetitive stress, that oxidative stress, all that stuff accumulates. And if that's your only focus, like you're gonna end up in a bad position. Yeah, to be fair, improvements in any metric of physical health within a particular range, right? So we're not going extreme. So improve your endurance or improve your mobility or improve your strength. All those things are gonna improve your health and your longevity. So to be fair, they all contribute. But here's the part that gets very challenging is there's other things that they sometimes don't include in the studies. For example, if you get stronger, you're less likely to lose your balance and fall. So I'd like to see a study that shows the correlation or connection between strength and falling down and breaking your hip. Or how about pain? If you get stronger, you're less likely to have pain, which means you're less likely to take pain medications, which have their own negative side effects. Those are two major factors. That can cause issues, right? So it's much more complicated. And also if you really want a good indicator of health, you're never gonna use one metric anyway. Even strength is by itself is flawed. You wanna look at multiple metrics to give you like a whole picture and then look at behaviors and quality of life. One of the reasons why we work with NCI, for example, is NCI actually takes that into account. They really take into account behaviors and context of the client. They're not, they're very science focused, but then they're also like, but also look at the person. Also consider what they're gonna be consistent doing, what they enjoy, what their quality of life is and what it can potentially mean downstream. And then here's how you apply it to this particular individual. I think that's so important. And a lot of certifications miss that because they just go off of the research. Hey, if you enjoyed that clip, you can find the full episode here or you can find other clips over here. And be sure to subscribe.