• * Under 18 must be accompanied by parent or legal guardian. First-time visitors and local residents only. Terms and conditions may vary and certain restrictions apply. No cash value; value may vary by market. Cannot be combined with any other offers or discounts. Valid at participating locations only. Each franchise location is independently owned and operated.
  • * Under 18 must be accompanied by parent or legal guardian.


7 Summer St Unit 5
Chelmsford, Massachusetts 01824


  • Each workout is different and challenging. I look forward to the next workout.
    - Jun 30, 2019 by R.B.
  • Good cardio workouts.
    - May 23, 2019 by K.H.
  • Hardest most efficient workout in 30 mins!!!
    - May 17, 2019 by E.W.
  • My favorite part of 9 round is the no class times. For my schedule, being able to jump in when it works for me is beyond amazing. Oh and the workouts are great!!!! I always feel amazing and accomplished after!!
    - May 8, 2019 by A.T.
  • A great workout in 30 minutes and individual training when needed!
    - May 8, 2019 by L.B.
  • Goes by fast, fun, love a couple of the trainers. First time I’ve really enjoyed working out
    - May 6, 2019 by K.S.D.
  • The workout is different each time. It's a big plus that you can go on your own schedule with no class times.
    - Apr 20, 2019 by D.W.
  • Great workout, great trainers!
    - Apr 19, 2019 by C.N.
  • The overall efficiency of it — quick, effective, variety.
    - Apr 18, 2019 by H.H.
  • I like everything about 9round.I feel really good in there.I enjoyed ever minute that I expend in there. Thanks 9Round
    - Apr 18, 2019 by M.D.

About the team

  • Michele <span class="nick-name">"Boss Lady"</span> Castellucci
    Michele "Boss Lady" Castellucci
    I am pleased to bring 9Round to people in the Chelmsford area in order to achieve my mission of improving health outcomes. My team and I will help our members realize that they are in charge of the direction of their health. Simply by becoming a 9Round member (aka. "9Rounder"), we will provide you with the best training sessions on the planet! Every human needs an exercise program that is efficient and sustainable, and that IS 9Round! Get your fitness done right in a lot less time than traditional ways of working out with the 9Round 30 minute fitness circuit! Our rates are much more affordable compared to "other" trainer led programs! A trainer is key if you want guaranteed results! All you need to do is show up for 3 training sessions (or more!) per week!
  • Felipe <span class="nick-name">"FM"</span> Masson
    Felipe "FM" Masson
    I am a student at UMASS Lowell studying biology. I plan to go to medical school afterward. I enjoy being a 9Round trainer because exercise is healthcare and I am helping our members improve their health.
  • Mauser <span class="nick-name">"Mow Wow"</span> Sencion
    Mauser "Mow Wow" Sencion
    Profile coming soon
  • Patricia  <span class="nick-name">"Patty"</span> Holly
    Patricia "Patty" Holly
    Bio coming soon
  • Brett <span class="nick-name">"Brett"</span> Pugh
    Brett "Brett" Pugh
    I'm a senior studying exercise physiology at UMASS Lowell with plans to pursue physical therapy after graduation. I love the workouts at 9Round! They are a fun and time efficient way to get into great shape and live a healthier life.

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