The fitness star is letting her followers know that being thin doesn't equate to being fit and strong.

Being thin doesn't always equate to being happier OR healthier, and no one knows that better than fitness star Emily Skye. The Australian trainer, who's well known for her body-positive messages, recently shared a before and after picture of herself that isn't what you'd expect.

The side-by-side comparison shows the 29-year-old in 2008 at 47 kilograms (about 104 lbs.) and now at 60 kilograms (about 132 lbs.)

Skye explains that the photo on the left is from before she started strength training. "I was only doing cardio and I was obsessed with being as skinny as I could be," she shares in the caption. "I was starving myself and was really unhealthy and unhappy. I suffered depression and had terrible body image."

While addressing the second image, she says she weighs 13 kg (about 28 lbs.) more and explains how the weight gain has helped her experience better body image. "I lift heavy weights and do a little bit of HIIT," she says. "I don't do ANY long cardio sessions, and I eat more than I've ever eaten in my life."

"I'm also happier, healthier, stronger, and fitter than I have ever been. I no longer obsess over the way I look. I eat and train to feel my best, for overall health and longevity. "

She continues by encouraging her followers to focus on exercising and eating well - not for weight loss - but for overall health.

"Exercise and eat nutritious food because you love yourself and know that you deserve to be your best," she says. "Try not to focus on being 'skinny' and just focus on your overall health - mental and physical." Preach.