Dr. Stacy Sims

Yeah, for sure. I like to kind of start this conversation when we look at the sex differences that exist at birth. So that's like without our hormone fluctuations from our menstrual cycle and stuff. So when we look at XX versus XY, because that's the primary area of research that we have. Very binary, but that's all we have at the moment.

Yeah, for sure. I like to kind of start this conversation when we look at the sex differences that exist at birth. So that's like without our hormone fluctuations from our menstrual cycle and stuff. So when we look at XX versus XY, because that's the primary area of research that we have. Very binary, but that's all we have at the moment.

If you are born XX, then you have more endurant type fibers. So your slow twitch, your oxidative, very aerobic type fibers. And with that comes a lot of mitochondria work. So that means your body's really able to take fatty acids and use it, use oxygen and go long and slow.

If you are born XX, then you have more endurant type fibers. So your slow twitch, your oxidative, very aerobic type fibers. And with that comes a lot of mitochondria work. So that means your body's really able to take fatty acids and use it, use oxygen and go long and slow.

If you are born XX, then you have more endurant type fibers. So your slow twitch, your oxidative, very aerobic type fibers. And with that comes a lot of mitochondria work. So that means your body's really able to take fatty acids and use it, use oxygen and go long and slow.

When we look at XY, they're born with more of the fast-twitch glycolytic power-based fibers, so good at speed, good at quick reaction time, good at doing super high-intensity work, and they have to work on developing that aerobic system.

When we look at XY, they're born with more of the fast-twitch glycolytic power-based fibers, so good at speed, good at quick reaction time, good at doing super high-intensity work, and they have to work on developing that aerobic system.

When we look at XY, they're born with more of the fast-twitch glycolytic power-based fibers, so good at speed, good at quick reaction time, good at doing super high-intensity work, and they have to work on developing that aerobic system.

So as we feed forward and see at the onset of puberty what happens is there's another divergence where with what we call the epigenetic exposure or the situational change that happens with estrogen, progesterone, to some extent testosterone in girls, we have a change in all of our biomechanics. So our center of gravity goes from being up in the chest area down to the hip area.

So as we feed forward and see at the onset of puberty what happens is there's another divergence where with what we call the epigenetic exposure or the situational change that happens with estrogen, progesterone, to some extent testosterone in girls, we have a change in all of our biomechanics. So our center of gravity goes from being up in the chest area down to the hip area.

So as we feed forward and see at the onset of puberty what happens is there's another divergence where with what we call the epigenetic exposure or the situational change that happens with estrogen, progesterone, to some extent testosterone in girls, we have a change in all of our biomechanics. So our center of gravity goes from being up in the chest area down to the hip area.

Our hips widen, our shoulder girdle widens, but we're not told about this. So we feel ungangly in our bodies. We aren't taught how to run again, how to jump, how to swing, how to land or any of those things. They're just, well, you are at this point, you get your period. We know girls drop out of sport, but it has to do with the fact that the actual biomechanics of the body have changed.

Our hips widen, our shoulder girdle widens, but we're not told about this. So we feel ungangly in our bodies. We aren't taught how to run again, how to jump, how to swing, how to land or any of those things. They're just, well, you are at this point, you get your period. We know girls drop out of sport, but it has to do with the fact that the actual biomechanics of the body have changed.

Our hips widen, our shoulder girdle widens, but we're not told about this. So we feel ungangly in our bodies. We aren't taught how to run again, how to jump, how to swing, how to land or any of those things. They're just, well, you are at this point, you get your period. We know girls drop out of sport, but it has to do with the fact that the actual biomechanics of the body have changed.

So when we start looking at all of these trends that are out there and about doing like zone two work and improving our aerobic capacity and trying to do ketogenic diet for improving our fat burning capacity, all that's based on male data. Because being born that XX, you already have all of that capacity.

So when we start looking at all of these trends that are out there and about doing like zone two work and improving our aerobic capacity and trying to do ketogenic diet for improving our fat burning capacity, all that's based on male data. Because being born that XX, you already have all of that capacity.

So when we start looking at all of these trends that are out there and about doing like zone two work and improving our aerobic capacity and trying to do ketogenic diet for improving our fat burning capacity, all that's based on male data. Because being born that XX, you already have all of that capacity.

What we need to work on throughout our entire life is working on that power base and the fast twitch. And I say that because we want to be able to produce power. We want to be able to run fast, to jump, to land, to have good coordination. But more than that, when we look at longevity and we see this is really important in peri and postmenopausal that we keep producing lactate for brain health.

What we need to work on throughout our entire life is working on that power base and the fast twitch. And I say that because we want to be able to produce power. We want to be able to run fast, to jump, to land, to have good coordination. But more than that, when we look at longevity and we see this is really important in peri and postmenopausal that we keep producing lactate for brain health.

What we need to work on throughout our entire life is working on that power base and the fast twitch. And I say that because we want to be able to produce power. We want to be able to run fast, to jump, to land, to have good coordination. But more than that, when we look at longevity and we see this is really important in peri and postmenopausal that we keep producing lactate for brain health.