13 photos that show how different women's bodies can look at the same weight

When it comes to fitness, many women are fixated on the number on the scale - and so, they modify their diet and exercise with the goal of losing weight.

But in reality, how much a person weighs doesn't actually reflect their level of fitness, according to Don Saladino, a New York City trainer known for sculpting the bodies of Blake Lively and Ryan Reynolds.

Fat and muscle weigh the same - though muscle is more dense and distributed differently on a person's body. So a woman who works out all the time might weigh the same as a woman who rarely hits the gym, but she'll also likely look completely different.

"It's like buying food in a bag or food in a can. You can weigh both items and they can weigh the exact same, but their structure is completely different because of what it's made of," Saladino told INSIDER.

Here are 13 images from MyBodyGallery that showcase just how different women can look at the same weight.