Jack McDonald
Founder and Head Trainer
Jack has trained clients since 2014 and started FitU in a 400 sq ft garage in January 2020. He grew up overweight with a huge appetite, until an arm injury in high school sent him to a physical therapist who showed him he could change his body. Clients say he's best at helping them identify their gifts and find real food freedom. He and his wife, Olivia, have four kids.
"Your body is a gift worth caring for."
Justin
Head Trainer
Coaching at FitU since November 2021. Justin's greatest strength is building meaningful relationships and helping clients discover their personal reasons for training, so together they can make intentional decisions that line up with their goals. Outside the gym, he's blessed with a wonderful wife and three children, and he loves reading, writing and spending his Sundays watching the Philadelphia Eagles after church.
"There's always an opportunity to improve your health, even if what that improvement looks like changes through different seasons of life."
Mike
Head Trainer
Coaching at FitU since January 2023. Clients say Mike is best at motivating them to change for the better and challenging their mindset to match their goals. Outside the gym, he loves music and was once in a band.
"The roles we play in our lives are so impactful that when we excel in fitness, so does everyone in our lives."
Jason
Trainer
Coaching at FitU since April 2024, after starting his internship in December 2023. Clients say Jason is best at answering their questions. Outside the gym, he's happily married with two wonderful children.
"Be consistent, have faith in the process, and you'll earn the results you want."
Christian
Trainer
Coaching at FitU since November 2024. Clients say Christian is best at meeting them where they are and knowing when to push them, and he loves helping people work toward things they used to think were out of reach. Outside the gym, he's usually hoping for a Cowboys victory, teaching a fall prevention class, or hanging out with his wife.
"You're capable of more than you think, in the gym and in everyday life."
Peter
Trainer
Coaching at FitU since July 2025. Peter was heading into his 30s, overweight and having never trained, when he had a wake-up call. Once he got his nutrition in check and started lifting, he found he loved it. Clients say he's best at keeping the big-picture goals in mind and connecting today's work to the longer journey. He grew up in San Diego and lived in Chicago for 10 years.
"Wherever you are, there's a path forward toward your goals."
Tom
Trainer
Coaching at FitU since January 2026. Clients say Tom is best at listening to their concerns about an exercise and coaching them through it. Outside the gym, he loves watching football with his son, Knox.
"Leave stronger and more capable of handling life and anything you want to do outside the gym."
Brycen
Trainer
Coaching at FitU since August 2026. Full bio coming soon.
AJ
Trainer
Coaching at FitU since January 2026. Full bio coming soon.