Understanding the human body is a team effort. That's where the Yachtel group comes in.

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

Yachtold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

To learn more about Yachtolt, visit yawcult.co.com.

That's Y-A-K-U-L-T-C-O-J-P. When it comes to a guide for your gut, count on Yacolt.

For scientists, For Scientific American Science quickly, I'm Rachel Seltman. Just to give you a quick head-up, we'll be able to give you a quick heads up, we'll be talking about physical fitness today.

We'll touch on topics such as disordered eating and intentional weight loss.

Social media is full of fitness influencers promising bikini bodies and hawking fat-burning cardio routines, especially

for women and femme presenting people. But if you know where to look, you can find folks who are

doing things differently, exercising slowly, lifting heavy, and getting strong, a process that

often involves fewer workouts and a lot more calories.

One of the most popular figures in the femme lifting space is writer Casey Johnston.

Her book, A Physical Education, How I Escapeed Diet Culture and Gain the Power of Lifting,

just came out, and she's here to tell us more about how strength training can change our relationship with fitness, body image, and even our own minds.

Hey, thanks so much for coming on to chat. Hi, thanks for having me.

So I would love to start by asking, what misconceptions did you have about lifting and strength training before you got into it?

I think a lot of the same things that a lot of

people have. I thought that if I started lifting weights, it would make me bulky instantly.

And I thought it was only for people who really needed to be strong, like in a professional way.

Like if you were like an Olympic athlete or like an NFL running back or you have some sort of

strength oriented job. And the other misconception I had was that muscle is always just sort of there

on your body waiting for you to lose all of the body fat in order for the muscle to suddenly

...