Dr. Stacy Sims

Yeah, yeah. And so when we're looking at girls whose bodies are changing, we see that by the age of 14, girls who previously were sporty, over 60% of them drop out of sport. Because they're not taught that their bodies are changing, so they don't feel comfortable running or swimming or jumping or landing. Because they have a new cue angle, they become quad dominant.

Yeah, yeah. And so when we're looking at girls whose bodies are changing, we see that by the age of 14, girls who previously were sporty, over 60% of them drop out of sport. Because they're not taught that their bodies are changing, so they don't feel comfortable running or swimming or jumping or landing. Because they have a new cue angle, they become quad dominant.

Their center of gravity is different. Their shoulders are wider, so they don't feel comfortable running because their whole running mechanics change. So, you know, when we're looking at girls who are eight, they can keep up with the boys, right? Their bodies haven't quite started changing yet. By the time they're 10... They're starting to see a discrepancy.

Their center of gravity is different. Their shoulders are wider, so they don't feel comfortable running because their whole running mechanics change. So, you know, when we're looking at girls who are eight, they can keep up with the boys, right? Their bodies haven't quite started changing yet. By the time they're 10... They're starting to see a discrepancy.

And I say that because my daughter's now 12, and I've seen it over the course of the elementary school years where they used to be on par with the boys playing soccer and rugby and stuff on the field. And then you start seeing a morph where the boys are... becoming more aggressive and they're kicking the balls faster and running faster.

And I say that because my daughter's now 12, and I've seen it over the course of the elementary school years where they used to be on par with the boys playing soccer and rugby and stuff on the field. And then you start seeing a morph where the boys are... becoming more aggressive and they're kicking the balls faster and running faster.

And the girls are starting to develop a little bit more, getting a little bit more body fat, feeling a little bit more comfortable running. They can't do the monkey bars anymore because their center of gravity is lower, so they can't get up and do the monkey bars as well. But no one explains this to them.

And the girls are starting to develop a little bit more, getting a little bit more body fat, feeling a little bit more comfortable running. They can't do the monkey bars anymore because their center of gravity is lower, so they can't get up and do the monkey bars as well. But no one explains this to them.

So then when we see this discrepancy of being sporty, not sporty, we see the changes in body composition. And all of this is in those early stages of the teen years, which is another knock because we also have brain changes where girls become more self-aware and boys don't. They're like, okay, you know what? You piss me off. I'm going to beat you up and we're going to get on with it.

So then when we see this discrepancy of being sporty, not sporty, we see the changes in body composition. And all of this is in those early stages of the teen years, which is another knock because we also have brain changes where girls become more self-aware and boys don't. They're like, okay, you know what? You piss me off. I'm going to beat you up and we're going to get on with it.

But girls are very self-aware and they hold on. things to themselves in a more negative fashion. And this creates a lot of mood changes. And this also creates a feeling of negative body positivity. So they don't feel that comfortable with how they look or who they are. And society doesn't help that either.

But girls are very self-aware and they hold on. things to themselves in a more negative fashion. And this creates a lot of mood changes. And this also creates a feeling of negative body positivity. So they don't feel that comfortable with how they look or who they are. And society doesn't help that either.

So this all perpetuates in a sociocultural as well as a biological change with regards to exercise.

So this all perpetuates in a sociocultural as well as a biological change with regards to exercise.

Yeah. So if we see essential fat for men is around 4% to 8%, so that means what we need for our nerves and just survival. For women, essential fat is around 12%. So this is for nerves and looking around our essential organs to survive.

Yeah. So if we see essential fat for men is around 4% to 8%, so that means what we need for our nerves and just survival. For women, essential fat is around 12%. So this is for nerves and looking around our essential organs to survive.

We look at body composition itself, we see that women tend to sit around 20% as a normal healthy individual, although the data's changed over the years, and men sit around 15%.

We look at body composition itself, we see that women tend to sit around 20% as a normal healthy individual, although the data's changed over the years, and men sit around 15%.

So women have smaller heart and lungs relative body size to men. We also have less hemoglobin. So that means our oxygen carrying capacity is lower. Because if we are looking at our red cells and we have four different what we call heme molecules in a red cell and each one carries oxygen. Our red cell count is lower as compared to men because the red cell count is driven by testosterone.

So women have smaller heart and lungs relative body size to men. We also have less hemoglobin. So that means our oxygen carrying capacity is lower. Because if we are looking at our red cells and we have four different what we call heme molecules in a red cell and each one carries oxygen. Our red cell count is lower as compared to men because the red cell count is driven by testosterone.