Keeping Your Marbles
When Sharea Clark opened Marbles Brain Body Fitness in Fishers, it wasn’t because she wanted to start another gym. It was because — after more than 27 years in the physical therapy world — she had seen what happens when people begin to lose confidence in their bodies and their minds.
Over her career, Clark worked with countless individuals navigating injury, aging, neurological challenges and recovery. She watched people make progress in therapy, only to feel lost once formal treatment ended. She also listened as patients and families voiced fears about brain fog, falling, memory loss and the possibility of dementia — often unsure where to turn next.
“I kept seeing the same gap,” Clark says. “People wanted to stay proactive, but traditional gyms felt intimidating, and therapy wasn’t always the right fit anymore. I wanted a space where people could safely work on both their brain and body—together.”
That vision became Marbles Brain Body Fitness, built on the belief that staying mentally sharp and physically capable should be accessible, supportive and life-changing, especially as we age.
Marbles combines functional fitness with dual-task brain training, challenging members to move while thinking, reacting and making decisions — just like real-life demands. Exercises focus on balance, coordination, strength and cognitive engagement at the same time, helping strengthen neuroplasticity, the brain’s ability to adapt and form new connections.
Members often arrive with limitations. Some feel unsteady or afraid of falling. Others notice memory slips or mental fatigue. Many come in carrying fear — of dementia, of losing independence or of not knowing where they belong in the fitness world. Caregivers, too, find their way to Marbles, often exhausted and putting their own needs last.
And then, something begins to shift.
Members share that they feel steadier on their feet. They’re remembering names more easily. They’re moving with greater confidence and less hesitation. Some talk about getting up from the floor without fear or keeping up with grandchildren again. Others say the biggest change is emotional—feeling hopeful, capable and in control once more.
“These are the moments that mean everything to me,” Clark says. “When someone walks out feeling stronger than when they walked in — physically and mentally — that’s why Marbles exists.”
The atmosphere at Marbles reflects that purpose. It’s calm, welcoming and encouraging — not intimidating or competitive. Progress is personal. Small victories are celebrated. And members are met exactly where they are, without judgment.
Starting Marbles meant stepping into a nontraditional space in fitness, but Clark believed then — and still believes now — that this work matters.
“Science shows that the choices we make today can protect our brains tomorrow,” she says. “And every time someone tells me they feel sharper, steadier or more confident, I’m reminded why I started this journey.”
Marbles Brain Body Fitness is more than a gym. It’s a community designed to support successful aging, recovery and resilience.
And most of all, it’s a place that says: We are here for you — to help you take back your health, mobility and independence, and continue living life with clarity, confidence and purpose.
