Meet our Founder
Pete Nelson II


Husband / Father
28x Ultrarunner

The Journey

Pete's journey embodies the very essence of SISU, the Finnish concept of determination, resilience, and grit in the face of challenges.

His personal transformation led him to discover the restorative power of sauna and contrast therapy. After experiencing firsthand how sauna heat and cold immersion could revolutionize recovery, he set out to share that gift with others. This was not a passing trend, but a lifestyle grounded in centuries of wisdom.

Pete’s commitment to wellness is deeply personal. He is a father of two and lives with his wife in Northeast Ohio, where SISU products are made. His approach to health is holistic, blending peak physical challenge with deeply restorative practices. Everything he does is rooted in a sense of community and purpose.

The idea for SISU took shape during one of his early morning runs with co-founder Nick Dadas. When the COVID pandemic disrupted the sauna wholesale market, they saw an opportunity. They imagined a product that was handcrafted, dependable, and inspired by Finnish tradition. Just two days later, they began conversations with a potential partner.

Pushing the Limits

  • Winner of the Antarctica 50K Ultra Marathon (March 2024)

  • Completed 28 ultramarathons


  • Founder of the Hell on Hogsback Endurance Race Series (benefiting cancer patients)


  • Lifelong athlete: basketball standout → CrossFit athlete → ultrarunner

Building SISU

  • March 2022: SISU co-founders Pete and Nick Dadas envision building their own sauna company during a trail run.

  • June 2022: The first working sauna is built — the “Edwin Barrel.”

  • August 1, 2022: SISU Sauna Co. launches to market.

  • Handcrafted in Ohio, using USA Western Red Cedar, Amish + Finnish craftsmanship, and industry-leading heaters.

  • SISU saunas now ship across the U.S. to elite athletes, families, and wellness-minded communities.

Recovery Mindset

Post Strength Training / Run:

195°F for 15-20 min.

(1/4 liter of water on the rocks) every 10 min.

Finish with 3 minutes of nasal breathing

Contrast Recovery Session:

3 Rounds: 190°F for 20 minutes

+1 min. outdoor shower & 2 min. cold plunge

Night Cap Session:

180°F for 15-20 Min (no phones)

Beyond Business

Pete’s mission with SISU extends beyond product innovation. He envisions a movement, a wellness-minded tribe that values performance, recovery, and connection. Through and his involvement in the endurance and fitness community, Pete is building a culture of resilience.

Social Media:

Instagram: @petenelsonii
LinkedIn: peter-nelson-ii
Email: info@sisulifestyle.com

Featured Podcast Appearances:

🎙️ The Nick Bare Podcast #077

🎙️ Bodybuilding.com Podcast Ep. 20

🎙️ Keep Hammering Collective Podcast

Checkout our SISU Origins Video

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