About - Leah Jantzen
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Meet Coach Leah Jantzen, M.S.

Leah Jantzen is a Life and Business Strategist who works with highly motivated, energetic, enthusiastic, creative individuals looking to make profound changes in their lives. She EMPOWERS her clients to reach new heights with their innate abilities and talents.

Leah dramatically expands her clients’ vision of what’s possible. Her clients live bigger and experience higher levels of personal and professional success.

Leah received her professional training through Coach University, a worldwide leader in coach training. Leah also holds a Masters Degree in Counseling and a graduate certificate in Educational Leadership and Supervision from Long Island University at C.W. Post College. Before starting her coaching business, she was a guidance counselor for 12 years in her hometown on the North Shore of Long Island.

Leah spends her “free time” driving her three elementary school-aged children to basketball, piano, soccer and baseball while traveling to club volleyball tournaments with her 16 year old daughter. She and her husband Michael enjoy watching sports together and can be found cheering on the local New York sports teams. Leah can also be found lifting weights at Real Deal Fitness or Orange Theory, swimming at the local pool, running in Old Field or on her bike at Heckscher Park—basically any form of exercise will do! Leah lives in Setauket, New York a small hamlet on the north shore of Long Island, and especially enjoys the beautiful summer months on the beach.

“If your actions inspire others to dream more, learn more, do more and become more, you are a leader.”

~John Quincy Adams

Hello Everybody - My Name is Leah

I’m Leah—mental performance coach, mother of four, elite athlete, speaker, and now a voice for midlife women who are ready to reclaim their power.

For years, I built a life around endurance. I’ve raced the Boston Marathon five times, finished top 10 overall in a 50K ultramarathon, and qualified for the Ironman World Championships in Kona, Hawaii—an honor earned by only the top 1% of athletes in my age group. I trained hard, competed fiercely, and proved that it’s never too late to go after big goals.

But reinvention is my real sport.

After decades working in public education, I created a first-of-its-kind position in my high school: a mental health and performance coach for student-athletes. I built programs that taught kids how to strengthen their mindset, manage pressure, and lead with confidence—not just in sports, but in life. That work lit a fire in me.

Eventually, I made the bold decision to retire from endurance racing—the very thing I was elite at—and trade long runs for heavy lifts and the joy of picking up my tennis racket again. I chose to explore strength in a new way. One that made space for growth, vitality, and longevity.

Now, I serve a new team: midlife women.

Women who are strong, but tired. Capable, but unsure of what’s next. Women raising kids, leading families, navigating career pivots, aging parents, and changing bodies. Women who know there’s more waiting for them—and are ready to go get it.

Through my coaching, speaking, and upcoming podcast Still in the Game, I help women rewrite the story of midlife. I believe we are just getting started. We deserve to live with intention, claim our space, and pursue what we’ve earned—without apology.

I’m also proud to serve as an ambassador for Youth, Inc. where I work to empower the next generation of athletes through mentorship, mindset, and mission.

Whether I’m on the sidelines, on stage, or behind the mic, my purpose is clear: to help people—especially women—see what they’re capable of and take the shot.

You’re still in the game. And so am I. Let’s go.

Leah Jantzen
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