Anne Mahlum, Founder & CEO at Solid Core
4.9/5 Rating
Fitness, Health & Wellness, Technology
$100K–$500K/mo

Anne MahlumFounder & CEO

In this interview, entrepreneur Ann Malum shares how she transformed a single fitness studio into Solidcore, one of the most successful boutique fitness brands in the United States. She discusses the lessons she learned from building a nonprofit, scaling a business to more than 100 locations, raising capital, leading through uncertainty, and achieving a nine-figure exit. Ann also reveals her philosophy on leadership, investing, wealth creation, and why community, discipline, and self-belief are the foundations of long-term success.

Anne Mahlum

Anne Mahlum

Founder & CEO

Solid Core

Founder Stats

  • Fitness, Health & Wellness, Technology
  • Started 2013
  • $100K–$500K/mo
  • Solo Founder team
  • USA

About Anne Mahlum

Ann Malum is the founder of Solidcore, a boutique fitness company that grew from a single studio into a nationwide brand with more than 100 locations. Before entering the fitness industry, she founded Back on My Feet, a nonprofit that used running to help individuals experiencing homelessness rebuild their lives. Through a combination of community building, operational excellence, and relentless execution, Ann scaled Solidcore into a category-defining business and achieved a nine-figure exit. Today, she focuses on investing, advising entrepreneurs, and sharing lessons on business, leadership, and personal growth.

Interview

August 8, 2025

Q

What did it feel like to make $90 million in one day?

Question 1 of 17
Anne Mahlum

It felt earned. Honestly, it didn’t feel like an overnight success. It was the culmination of years of hard work, and it was part of my plan from day one to build an empire, not just one studio.

0
Q

What inspired you to build a nonprofit and help homeless people?

Question 2 of 17
Anne Mahlum

Growing up with a father who struggled with addiction deeply affected me. I saw how powerful self-respect and self worth were in changing lives, and that’s what I tried to instill in the homeless men I worked with through the running club.

0
Q

What did you learn about people that fascinated you from working with the homeless?

Question 3 of 17
Anne Mahlum

Everyone wants to be seen, respected, and celebrated. This is what kept people coming back to the shelters for the running club and later to Solid Core. It’s about making people feel good about themselves and giving them a sense of belonging.

0
Q

How did you manage the transition from nonprofit work to founding Solid Core?

Question 4 of 17
Anne Mahlum

It was scary, but I knew I had to trust myself and go all in. I wanted to do something bigger, and I saw fitness as a way to build that empire. It wasn’t just a hobby for me, it was a vision.

0
Q

How did you approach the first Solid Core studio?

Question 5 of 17
Anne Mahlum

It was all in. I didn’t have a backup plan. I put all my savings into the business and worked tirelessly to make it succeed. It was a constant hustle passing out flyers, doing guerrilla marketing, and making sure every detail was perfect.

0
Q

How did you scale the community aspect of Solid Core?

Question 6 of 17
Anne Mahlum

I made sure the environment felt welcoming and celebratory. It was important that people felt valued and seen. We fostered a sense of community by making sure every client felt like they belonged and were appreciated.

0
Q

What was your approach to momentum once you started scaling Solid Core?

Question 7 of 17
Anne Mahlum

Once the momentum started, it was easy to keep it going. We had a clear plan and stayed ahead of everyone. By focusing on operations, real estate, marketing, and training, we were able to expand rapidly, opening 32 studios in just one year.

0
Q

How did you ensure quality control across multiple locations?

Question 8 of 17
Anne Mahlum

Training was everything. I sent our corporate team to train coaches at new locations, making sure they understood the brand’s values and how to deliver the experience we promised. Quality control was about consistency in training and upholding our standards.

0
Q

How did you approach hiring at Solid Core?

Question 9 of 17
Anne Mahlum

We hired for personality first. Coaches had to be likable, funny, and good with people. That’s what made the community work. We were hiring from within our client base, people who already believed in the brand and could embody our values.

0
Q

What did you learn about opening new markets and choosing locations?

Question 10 of 17
Anne Mahlum

It was about creating a presence in a market. We wouldn’t open a studio unless we could open five within a 15 20 mile radius. This created brand equity, so every new location was instantly profitable, with a waitlist from day one.

0
Q

What advice would you give to entrepreneurs thinking about an exit strategy?

Question 11 of 17
Anne Mahlum

Plan for succession from the start. Your team needs to be able to run the business without you. When it came time for my exit, it was crucial that I had the right people in place and the business was ready for growth with or without me.

0
Q

How did you feel about selling Solid Core to Wix?

Question 12 of 17
Anne Mahlum

It wasn’t a decision I had to make quickly. I knew the business was profitable, but partnering with Wix allowed for faster scaling. The chemistry with their team felt right, and I saw it as the best way to grow the brand even further.

0
Q

What do you think is the key to scaling quickly and successfully?

Question 13 of 17
Anne Mahlum

Speed and focus. Once you have momentum, you can’t slow down. Keep pushing, keep optimizing your operations, and ensure your team is aligned with your vision.

0
Q

What was your primary tech stack at Solid Core?

Question 14 of 17
Anne Mahlum

We used Render.com for hosting, MongoDB for data storage, and Python for backend development. I kept the tech stack simple to keep it manageable, especially as we scaled rapidly.

0
Q

What kind of person did you hire first for Solid Core?

Question 15 of 17
Anne Mahlum

I hired a technical product person who could handle everything from analytics to scripts. The first person I hired was key to getting growth off the ground and taking ownership of critical functions.

0
Q

What’s the best piece of advice you’ve received as an entrepreneur?

Question 16 of 17
Anne Mahlum

The best advice was to focus on what you’re really good at and delegate the rest. Don’t waste time on areas where you’re not naturally strong. It’s important to build a team that complements your skills.

0
Q

What would you want your legacy to be when all is said and done?

Question 17 of 17
Anne Mahlum

I want to be remembered as someone who made people’s lives better, healthier, and happier. Building businesses that improve lives, build communities, and empower individuals that’s the ultimate goal.

0

Video Interviews with Anne Mahlum

She Built a $100M Fitness Empire From Nothing - Solidcore Founder Anne Mahlum

She Built a $100M Fitness Empire From Nothing - Solidcore Founder Anne Mahlum

She Built a $100M Fitness Empire From Nothing - Solidcore Founder Anne Mahlum

Anne Mahlum: Solid Core Founder On Fear, Identity, Masculine vs. Feminine Energy

Anne Mahlum: Solid Core Founder On Fear, Identity, Masculine vs. Feminine Energy

How Anne Mahlum Built and Sold a $98M Business: Lessons in Scaling, Leadership, and Culture

How Anne Mahlum Built and Sold a $98M Business: Lessons in Scaling, Leadership, and Culture

Cite This Interview

Use this interview in your research, article, or academic work

Related Interviews

Allison Ellsworth, Co-founder at Poppi
Retail

Allison Ellsworth

Co-founder at Poppi

Approx. $42 Million
250+

In this interview, Poppi co-founder Allison Ellsworth shares the journey of building a prebiotic soda brand from a kitchen counter experiment to a 1.95 billion…

Read Interview
Sam Altman, Co-founder & CEO at OpenAI
AI

Sam Altman

Co-founder & CEO at OpenAI

Approx. $2 Billion
8000+

In this interview, OpenAI co-founder and CEO Sam Altman discusses the shifting dynamics of startup creation, the trajectory of model scaling laws, and the geopolitical…

Read Interview
Jamie Dimon, Chairman & CEO at JPMorgan Chase
Finance

Jamie Dimon

Chairman & CEO at JPMorgan Chase

Approx. $15 Billion
32000+

In this interview, JPMorgan Chase Chairman and CEO Jamie Dimon discusses navigating macroeconomic tail risks, managing corporate bureaucracy, and building long-term financial resilience. Dimon addresses…

Read Interview
Jensen Huang, Co-founder & CEO at NVIDIA
Technology

Jensen Huang

Co-founder & CEO at NVIDIA

$1M+
50000+

In this interview, NVIDIA co-founder and CEO Jensen Huang discusses the geopolitical landscape of AI, the co-existence of open-source and closed models, and the massive…

Read Interview
Chris Best, Co-founder & CEO at Substack
Technology

Chris Best

Co-founder & CEO at Substack

Not Publicly Disclosed
100+

In this interview, Substack co-founder and CEO Chris Best discusses the challenge of AI slop, the premium on human attention, and Substack's new transparency tooling.…

Read Interview
Kiran Mazumdar-Shaw, Founder & Executive Chairperson at Biocon
Health & Wellness

Kiran Mazumdar-Shaw

Founder & Executive Chairperson at Biocon

Approx. $172 Million
15000+

In this interview, Biocon founder and executive chairperson Kiran Mazumdar-Shaw discusses the pioneering of India's biotechnology sector, from launching an enzyme startup to building a…

Read Interview