Ashley Calhoun
Personal Trainer
NASM CPT
Strength and conditioning for everyday goals and everyday people.
Read full bioReal people, not stock models
Meet the ONE Boulder Fitness team — the people are the reason.
ONE Boulder Fitness is staffed by named, credentialed people — eight certified personal trainers (including owner Karie Kerner, who still trains members most days), a resident Doctor of Physical Therapy, a resident Registered Dietitian, co-owner Kyle, and Bucky, the three-legged club dog. Woman-owned, downtown Boulder, and nobody wears a uniform. Click “Read full bio” under any team member below for more.
Certified trainers
Your coaches.
Seven here, plus owner Karie Kerner below — eight certified trainers in total.
Julia Codling
Personal Trainer
NASM CPT
Women’s fitness and nutrition — confidence through real strength.
Read full bioCara Hoving
Personal Trainer
NASM CPT · Corrective Exercise
Kettlebell, TRX and Animal Flow; movement that carries into life.
Read full bioPeter McIntosh
Personal Trainer
NASM CPT
Boulder native who lost 50 lbs here — now coaches beginners with patience.
Read full bioJoe Robbins
Personal Trainer
NASM CPT · Nutrition
Powerlifting and anti-fragile, age-well strength.
Read full bioTammy Saurette
Personal Trainer & Group Fitness
AFAA CPT
35+ years teaching; cancer-survivor and all-levels fitness.
Read full bioResident experts, on-site
A physical therapist and a dietitian — down the hall.
Two credentialed practices operate inside the club: Atomic Physical Therapy and ActivEnergy Nutrition.
Dr. Emma Stevenson
Physical Therapist & Owner of Atomic Physical Therapy
DPT
On-site sports rehab — climbing and running injuries, dry needling.
Read full bioEmily Copeland
Registered Dietitian & Owner of ActivEnergy
MPH, RD
On-site sports nutrition, performance and healthy-aging counseling.
Read full bioOwnership & morale
The people who set the tone.
Both owners are in the building most days. It’s the reason there’s only one club.
Karie Kerner
Personal Trainer & Owner
NASM CPT · Feldenkrais
Woman-owned: Karie came in as Glen Marshman’s client, spent two decades on this floor, and now owns the place. Still training members most days.
Read full bioKyle Fittje
General Manager & Owner
On the floor, daily
Started at this front desk in 2010. Karie’s call brought him back — first to run the club, then to own it with her.
Read full bioBucky
Team Cheerleader
Three legs · One speed
She has three legs, she sleeps in physically improbable positions, and she greets you like you’ve been gone a year.
Read full bioCome meet us in person.
Book a free consult or claim a day pass — you’ll be greeted by name.