Reviews

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  • Eric Thayer
    Aug 2025

    Eric is an amazing trainer and an even better person! He has dedicated himself to this profession and it shows. He listens, he cares and he is extremely knowledgeable. I have had such a great experience and would highly recommend this gym to anyone!

  • Jamie Kuzniar
    Feb 2024

    This gym is a great hidden gem! Eric, the trainer and owner is super knowledgeable. He will push you to help with your own goals and is very welcoming. Everyone I have met here has been friendly and have enjoyed every workout. Definitely check it out!

  • Thomas Gentile
    Feb 2024

    Fantastic one-on-one training! Knowledgeable, friendly, positive coach. Glad I decided to try it out!!

  • Cindy Demerino
    Jan 2020

    Rock City Fitness is the place to go! Owner/Trainer Eric Maust has a ton of knowledge and experience, and he tailors the workout to your individual needs. With a little bit of effort on your part, the results will keep you coming back for more. So even if you're like me and don't LOVE working out, you'll still find yourself circling back to Rock City for more. The gym is awesome and super clean, with everything you could possible need. Eric makes working out regularly as fun as it could possibly be ;)

  • Brenna Ballard
    Jan 2020

    This is the first time I've committed to work out consistently - and I attribute it to Eric as a trainer and the atmosphere of Rock City Fitness. Eric pays attention to my goals and works with me to achieve them. I highly recommend!

  • Cindy Demerino
    Jan 2020

    Eric knows how to do it! Highly recommended.

  • Janice Carlson
    Sep 2019

    Overall amazing, outgoing and friendly staff! The facility is kept super clean which includes tanning and massage areas! This location is convenient and reliable for my busy day to day schedule.

  • Andrew Bearre
    Mar 2019

    Eric is outstanding. Listens and custom tailors workouts and programs that for you not just a general spreadsheet from client prior.

  • Cam Underdown
    Feb 2019

    Eric is an incredible trainer. He will get the best from you!

  • Devin Moffett
    Jan 2019

    good customer service

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Rock City Fitness

2177 Avon Industrial Dr, Rochester Hills

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Hours

Monday: 6AM - 9PMTuesday: 6AM - 9PMWednesday: 6AM - 9PMThursday: 6AM - 9PMFriday: 6AM - 9PMSaturday: 7AM - 12PMSunday: Closed