Serena Williams is embracing life after tennis with a renewed focus on health and fitness.

The 43-year-old retired tennis champion, now a mother of two, told People magazine she wants to run a half-marathon by the end of 2025.“I’ve gotten obsessed, more obsessed with diet and exercise,” Serena shared.

Though she retired from professional tennis two years ago, Serena admits she still misses the sport “like crazy.” Yet, her competitive spirit remains strong, motivating her to take on new challenges.

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“I’m trying to compete – not compete, rephrase – trying to do a half-marathon. That’s my new goal. So it’s just like I have to do something competitive,” she says.

Although she still enjoys comfort meals such as roast chicken and fries or spicy ramen noodles with her husband, Alexis Ohanian (41), and daughters, Olympia (7) and Adira (1), she keeps this for special treats and tries to be mindful about what she eats.

“I’m all about a healthy lifestyle,” Serena says.

Despite no longer competing professionally, Serena remains focused on maintaining her fitness.

“The more I don’t play sports professionally the more I think, ‘Okay, this is what I’ve done for literally my entire life and how do I optimise and keep it up?’” she says.

Beyond fitness Serena has also been active in business for the past 14 years, having invested in 85 companies, including a venture capital fund she founded in 2017. Impressively, 14 of these companies have achieved “unicorn” status, meaning they are each worth over $1 billion.

One of her investments includes MasterClass, an educational subscription platform.

“I remember finding that company with like eight people in a small room in a garage in San Francisco, and I just fell in love with what they were doing and what they were building,” she recalls.

While Serena has retired from tennis, her elder sister Venus (44) is still going strong.

Last month, after 30 years on the circuit and seven Grand Slam titles, Venus said she had no intention of retiring.

“I’m not done with the racket yet,” she said. “At this point it’s about picking and choosing places I want to be.”

“It’s nice to be in a place where I can pick and choose, but my game is always at a high level. Even if I’m not on tour I always keep my game quite high.”

She also revealed that people often make the mistake of assuming she’s also gone into retirement.

“Serena ruined it for me. Because as soon as she retired, everybody thought I retired,” Venus quipped.