Dr. Stacy Sims

And how does that improve people's longevity, wellbeing, but also for those who are trying to be parents who have a high performing job, who want to do well in their age group, race, whatever it is, how can we maximize some of the things we know from high performance with regards to sleep, heat, cold, and apply that to a person who's just trying to get everything done and what small things they can tweak to improve their own training and performance.

And how does that improve people's longevity, wellbeing, but also for those who are trying to be parents who have a high performing job, who want to do well in their age group, race, whatever it is, how can we maximize some of the things we know from high performance with regards to sleep, heat, cold, and apply that to a person who's just trying to get everything done and what small things they can tweak to improve their own training and performance.

Yeah.

Yeah.

I am a research scientist at AUT. It's where most of my PhD students are. And we have a women's health program. And then I also have an adjunct with the lifestyle medicine at Stanford. So that's where a lot of the public health research comes in.

I am a research scientist at AUT. It's where most of my PhD students are. And we have a women's health program. And then I also have an adjunct with the lifestyle medicine at Stanford. So that's where a lot of the public health research comes in.

There are sex differences in utero. I mean, when we look at... What does that mean? So sex differences when the baby's developing.

There are sex differences in utero. I mean, when we look at... What does that mean? So sex differences when the baby's developing.

So we look at stress and the mom under stress. We see that there's a higher incidence of a miscarriage if it's a developing boy fetus than a girl fetus. And it has to do with XX versus XY. Okay. Then after birth, we see that there's relatively little sex difference that is apparent until the onset of puberty.

So we look at stress and the mom under stress. We see that there's a higher incidence of a miscarriage if it's a developing boy fetus than a girl fetus. And it has to do with XX versus XY. Okay. Then after birth, we see that there's relatively little sex difference that is apparent until the onset of puberty.

But when we're looking at those sex differences that aren't that apparent, there are there. We see that there's a sex difference in what we call muscle morphology. So that means that men are born with more fast twitch fibers. So they have more anaerobic capacity as they get older. They have more ability to produce power. We see that girls are born with more endurant type fibers.

But when we're looking at those sex differences that aren't that apparent, there are there. We see that there's a sex difference in what we call muscle morphology. So that means that men are born with more fast twitch fibers. So they have more anaerobic capacity as they get older. They have more ability to produce power. We see that girls are born with more endurant type fibers.

So this means they have more mitochondria for oxygen consumption and oxidative stress and being able to go long and slow. Then when we get to the onset of puberty, we see an expansion of these sex differences with the exposure of the sex hormones. So what we're seeing is now the boys are getting leaner, they're getting faster, they're getting more aggressive.

So this means they have more mitochondria for oxygen consumption and oxidative stress and being able to go long and slow. Then when we get to the onset of puberty, we see an expansion of these sex differences with the exposure of the sex hormones. So what we're seeing is now the boys are getting leaner, they're getting faster, they're getting more aggressive.

But girls' bodies completely change because center of gravity drops from the chest down to the lower abdomen area because their hips widen. And their hips widen because, you know, being XX, they have to then accommodate for getting pregnant and eventually having a baby from a biological standpoint. Hips widen, shoulders widen. This changes the angle of the knee to the hip. So we then have a, yep.

But girls' bodies completely change because center of gravity drops from the chest down to the lower abdomen area because their hips widen. And their hips widen because, you know, being XX, they have to then accommodate for getting pregnant and eventually having a baby from a biological standpoint. Hips widen, shoulders widen. This changes the angle of the knee to the hip. So we then have a, yep.

The Q angle, yes.

The Q angle, yes.

Yep.

Yep.