Dr. Stacy Sims

And for people who break their fast regularly, by around 8 a.m., and then they don't eat after 6 p.m., have all these great metabolic outcomes that you would expect from, quote, intermittent fasting. But we see that people who hold a fast till noon or after don't get any of that benefit. So if we look, well, why, why is that?

And for people who break their fast regularly, by around 8 a.m., and then they don't eat after 6 p.m., have all these great metabolic outcomes that you would expect from, quote, intermittent fasting. But we see that people who hold a fast till noon or after don't get any of that benefit. So if we look, well, why, why is that?

And for people who break their fast regularly, by around 8 a.m., and then they don't eat after 6 p.m., have all these great metabolic outcomes that you would expect from, quote, intermittent fasting. But we see that people who hold a fast till noon or after don't get any of that benefit. So if we look, well, why, why is that?

We have to understand that half an hour after a woman wakes up, we have a spike in cortisol. That's our stress hormone. If we don't have food to tell the brain to drop that, then we stay in this heightened stress state. And what cortisol is responsible for is that fight or flight, but also providing fuel for being able to fight or flight.

We have to understand that half an hour after a woman wakes up, we have a spike in cortisol. That's our stress hormone. If we don't have food to tell the brain to drop that, then we stay in this heightened stress state. And what cortisol is responsible for is that fight or flight, but also providing fuel for being able to fight or flight.

We have to understand that half an hour after a woman wakes up, we have a spike in cortisol. That's our stress hormone. If we don't have food to tell the brain to drop that, then we stay in this heightened stress state. And what cortisol is responsible for is that fight or flight, but also providing fuel for being able to fight or flight.

So the first thing that goes is we start chewing into our lean mass, which is bone and muscle, and a signal to keep our body fat, especially as we start to get older.

So the first thing that goes is we start chewing into our lean mass, which is bone and muscle, and a signal to keep our body fat, especially as we start to get older.

So the first thing that goes is we start chewing into our lean mass, which is bone and muscle, and a signal to keep our body fat, especially as we start to get older.

Are you kidding me? No. No. I mean, when we look at the trends of the fasted training, don't eat before... It's all on male data. And the difference between men and women in this situation is, again, it comes down to the brain. So a man can get by with the fasted training because...

Are you kidding me? No. No. I mean, when we look at the trends of the fasted training, don't eat before... It's all on male data. And the difference between men and women in this situation is, again, it comes down to the brain. So a man can get by with the fasted training because...

Are you kidding me? No. No. I mean, when we look at the trends of the fasted training, don't eat before... It's all on male data. And the difference between men and women in this situation is, again, it comes down to the brain. So a man can get by with the fasted training because...

When we're looking at getting up and holding a fast or going training without food, for a man's body, it stimulates the little molecular structures in the muscles to use more fat because their muscle structure and the types of fibers that they have are different than women's. So men have what we call more glycolytic or fibers that use glucose and not as many oxidative or the fibers that use...

When we're looking at getting up and holding a fast or going training without food, for a man's body, it stimulates the little molecular structures in the muscles to use more fat because their muscle structure and the types of fibers that they have are different than women's. So men have what we call more glycolytic or fibers that use glucose and not as many oxidative or the fibers that use...

When we're looking at getting up and holding a fast or going training without food, for a man's body, it stimulates the little molecular structures in the muscles to use more fat because their muscle structure and the types of fibers that they have are different than women's. So men have what we call more glycolytic or fibers that use glucose and not as many oxidative or the fibers that use...

fat as a fuel. Women, we're born with more of those oxidative fat burning fibers. So when we go and we don't provide fuel, the body's like, I'm going to store fat because I'm going to need it because that's the preferred fuel for your muscles. So men's bodies will start to adapt to be able to use more fat, which is why you see fasting and holding a fast working so well in men, but

fat as a fuel. Women, we're born with more of those oxidative fat burning fibers. So when we go and we don't provide fuel, the body's like, I'm going to store fat because I'm going to need it because that's the preferred fuel for your muscles. So men's bodies will start to adapt to be able to use more fat, which is why you see fasting and holding a fast working so well in men, but

fat as a fuel. Women, we're born with more of those oxidative fat burning fibers. So when we go and we don't provide fuel, the body's like, I'm going to store fat because I'm going to need it because that's the preferred fuel for your muscles. So men's bodies will start to adapt to be able to use more fat, which is why you see fasting and holding a fast working so well in men, but

But for women, it doesn't do the same because we have different feedback mechanisms from the brain. We have different muscle requirements because of different morphology, we call it, or different muscle fiber types.

But for women, it doesn't do the same because we have different feedback mechanisms from the brain. We have different muscle requirements because of different morphology, we call it, or different muscle fiber types.