Simone Biles is looking within herself to continue advancing the sport of gymnastics. 

In an interview with TODAY's Hoda Kotb marking 100 days until the Tokyo Olympic Games, the four-time Olympic gold medalist broke down how she continues to motivate after years of topping podiums and pushing the boundaries of the sport. 

"It's more stressful whenever I go out and compete because I’m trying to be better than I was at the last meet," Biles said. "I’m trying to beat myself."

Biles, 24, added that she sometimes wonders if she can still outdo herself. 

"Sometimes you get caught up in the moment and it's just scary because I go out and I'm like, 'Can I do it again? Can I be this good?'" she said. 

Kotb later asked Biles, who considered retiring before Tokyo, why she decided to continue competing. Biles -- who has emerged as a powerful advocate for reform in gymnastics in the wake of the Larry Nassar scandal -- says she felt compelled to return to be a voice for the next generation.

"Gymnastics wasn't the only thing I was supposed to come back for," Biles said. "Because I feel like if there weren't a remaining survivor in the sport, they would've just brushed it to the side. But since I'm still here, and I have quite a social media presence and platform, they have to do something."

Watch the full interview below: