–  A former health care provider rep, Jill brings YEARS of experience to Hub City.  Holds certifications in Primary Group Fitness, TRX, Cycle, Kickboxing, Body Pump and Group power. Has been instructing at the corporate headquarters of the Boston Globe, Dunkin Donuts, Harvard Pilgrim Health Care and FM Global.  Avid participant in road races, tough mudder and spartan races.





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- Bachelor’s degree in Exercise Science.
- lifelong athlete with a passion for health and fitness
- experienced and able to work with people of all fitness levels.
- actively participates in all types of fitness activities including the PMC, obstacle races (The Spartan Race, Ruckus Race) as well as running road and trail races ranging from 5k to 25k.




CHRISTINE MACKIE –  A true veteran in the fitness industry.  A CPT for over 10 years, certified by the NCSF and also holds a BS in Psychology from the University of Massachusetts Boston with a minor in math. Other fitness certifications include: Crossfit Level One Coach, Certified Nutritionist, spinning, core board, physioball, and Reiki I therapy.  Experienced in group training, personal training, program design, fitness & nutrition consulting for all ages and fitness levels.


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MOLLY SIEGEL -completed a 100-hr yoga teacher training currently working towards RYT-200

–BS in Sports Biology from Springfield College

-introduces athletic sequences in a challenging yet welcoming class setting

-Exposes all participants to self- empowerment through education and motivation





KERI MANTIE - Keri is a Certified Strength and Conditioning Specialist through the National Strength and Conditioning Association (CSCS,NSCA). She received her Master’s Degree in Applied Exercise Science from Springfield College and her Bachelor’s in Exercise Physiology from UMass Boston. In over 15 years of training, she has worked as a strength coach for Mike Boyle’s Strength and Conditioning and has interned as a strength coach for the University of Tulsa, The College of the Holy Cross and Boston University. Since 2003, Keri has been a Master Trainer at Fitness Unlimited in Milton, MA. where she was also the Director of Personal Training until 2010 when she became a first time mom to twin boys. Keri most recently completed her coursework through Balance Body University to become a certified Pilates Instructor on both the reformer and mat apparatus.