Year 2 of the Caitlin Clark era is underway in Indiana, and she's looking to build upon one of the most impressive rookie seasons in WNBA history.
While Clark did not participate in any domestic or international leagues during the offseason, the work she has put in is well-documented. The proof is also evident through the results.
More than just on-court skill work, Clark went above and beyond in the weight room, resulting in a physical transformation that was a trending topic of discussion during the Fever's opening-day victory over the Sky.
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Here's what to know about Clark's transformation from her rookie to sophomore season in the league.
Caitlin Clark muscle transformation
Clark has notably added more muscle definition ahead of her second season in the WNBA. She detailed the focus of her transformation in interviews with ESPN and Women's Health Magazine.
Fever head athletic performance coach Sarah Kessler told ESPN's Alexa Philippou that Clark was in the weight room four to five times a week during the offseason, following through on her aspirations to add muscle mass ahead of her second season.
Among her focuses in the weight room were single-leg work to build explosiveness and single-arm exercises to improve Clark's upper-body strength.
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Many fans first noticed that Clark had added muscle when she was cheering for her alma mater courtside at the 2025 Big Ten women's basketball tournament. The added muscle definition was impossible to ignore, and the original post has amassed over three million views.
Well someone’s been in the weight room 👀😮💨 @CaitlinClark22 pic.twitter.com/yBU8p7tp31
— Bri Lewerke (@brilewerke) March 8, 2025
"That was the number one thing I knew I needed to improve, is just how strong I was,” Clark told Women's Health.
More than muscle mass, the strength component is what Clark was focused on to achieve more on the basketball court.
"It's just like, what basketball skills can we try to replicate in the weight room? Pushing off a certain leg, or things like that,” she said. “It's twofold—how are you getting better on the court, but how can the weight room help you get better at those things as well?”
However subtle — or drastic — differences may appear on first glance, Clark and the Fever hope that her focus on improvement in the weight room will pay dividends for the team's title hopes in the long run.
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